rollvis roller screws english

After its founding in 1970, ROLLVIS SA soon began to focus on the manufactureand marketing of satellite roller screws under the trademark « Rollvis swiss ».

Now a benchmark in this highly specialised field, ROLLVIS SA has investedin the most powerful machines for the production of screws with low tolerancemargins designed to individual specifications.

A fast-growing company with a young and highly qualified workforce, ROLLVIS SA recently moved into new ultra-modern premises near to Geneva.

It is structured to preserve its human scale and its capacity to listen and adaptperfectly to its customers’ requirements.

Three decades and more of skills and experience combined with the latesthigh-end techniques ensure its products comply with the most stringent anddemanding standards, notably in the following applications:

To ensure its satellite roller screws always gain by the latest progress in technologyto make them ever more reliable, ROLLVIS SA has set up its own « Researchand Development » department where its highly qualified engineers andtechnicians use the most recent and most powerful design software availablein their unceasing quest for the control of avant-garde technologies. New processes are constantly reviewed to optimise the product, productionsystem, quality control, tests and trials for individual requirements.

Even the most exacting customers swear by the outstanding reliability andquality of ROLLVIS products.

Present on all the continents, over time ROLLVIS SA has built up an excellentsales network, so that wherever you are in the world, there are experts to giveyou answers and advice.

Who is ROLLVIS ?

aeronautics, space

defence, car industry

moulding, injection(plastics and metal)

optical, graphics

special machine tools

medical

electrical cylinders

measuring machinesand laser machines

robotics, chemicals,

and all other fields of high technology

- 1 -

Introduction - Satellite roller screws compared to ball screws 2

Types of roller screws 3 and 4

Identification system 5

Accuracy - Efficiency 6

Geometry 7

Preloading 8

Preloading examples 9

Mean speed and axial load 10

Nominal lifespan 11

Rigidity 12

Rotation speed 13

Driving torque 14 and 15

Calculation example 16 and 17

Lubrication 18 and 19

Handling advice 20 and 21

Type RV ........ diameters of 3.5 to 12 22

Type RV ......... diameters of 15 to 23 23




Type RV ...... diameters of 80 to 150 27

Type BRV ......... diameters of 8 to 44 28

Type RVR ...... diameters of 8 to 125 29

Applications 30 to 32

contents

Preference program

No liability can be accepted for any errors or omissions. We reserve the right to make changes in the interest of technical progress.

- 2 -

ROLLVIS satellite roller screws are used to transform rotary movementsinto linear movements and vice versa. The bearing elements are threaded rollers between the screw and the nut. The high number of points of contactenables satellite roller screws to support very heavy loads.

The ROLLVIS manufacturing programme comprises satellite roller screwswithout roller recycling (types RV and BRV) and with roller recycling (type RVR),in a range of accuracy classes.

The ROLLVIS range also includes other types such as the reverse roller screw(type RVI) and the differential screw (type RVD).

Introduction

Satellite roller screws compared to ball screws

The satellite roller screw is similar to the ball screw with the differencethat the load transfer elements are threaded rollers.

The main advantage of satellite roller screws is that they have a highnumber of points of contact to support the load.

Load capacity and lifespanThe main advantage of roller screws compared to ball screws is that theiradmissible static and dynamic load capacities are higher.

The bearing function is ensured by threaded rollers instead of balls andthe load is spread over a higher number of points of contact.

Satellite roller screws like ball screws use Hertz’s law.The admissible Hertz pressure is the same for satellite roller screws andball screws. Satellite roller screws thus have a static load 3 times greaterthan that of ball screws and their lifespan is 15 times longer.

Speed & accelerationSatellite roller screws can rotate much faster and support much greateracceleration.

RV and BRV satellite roller screws are designed so that the rollers are notrecycled. This means the mechanism can support twice the rotation speedof a ball screw. Acceleration can reach up to 3g.

Lead & pitchPlanetary roller screw can be achieved with smaller leads comparedto ball screws.As the lead is a function of the pitch of the planetary roller screw, the leadcan be very small (0.5mm and even less).Planetary roller screws can be achieved with entire or real numbers (i.e. lead of 3.32mm per revolution), which avoid reduction gears. This is an advantage compared to ball screws. The lead can be chosen andrealised without any geometrical changes of both the screw shaft and thenut body, which allows updates with minor changes.In a ball screw the lead is limited by the dimension (OD) of the bearingball, which is a standard feature.

Rigidity & strengthThe many points of contact give a satellite roller screw greater rigidity andshock tolerance than a ball screw.

- 3 -

Types of roller screws

RVR satellite roller screws have very fine threads and are used whenvery great positioning accuracy is required along with high rigidity andload-carrying capacity.

The main elements of RVR satellite roller screws are the screw, the nutand the rollers which are guided and maintained at the correct distancein a cage.

The screw has a single- or two-start thread with a triangular profile. Theangle between the flanks is 90°. The nut has the same internal thread asthe screw. The rollers are not threaded but have grooves perpendicular

to the screw axis. The distance between the grooves matches the exposedthread of the screw and nut. The flanks are convex and the angle between them is 90°.

When the screw or nut rotates, the rollers are axially displaced in the nut.After a complete revolution, each roller is returned to its initial position bytwo cams at the end of each nut. They can be recycled this way becausethere is a groove the length of the nut.

The cage pockets are slightly longer than the rollers to enable them to move axially within the nut.

RVR screws

The main elements of RV and BRV satellite roller screws are thescrew, the nut and satellite rollers.

The screw has a multiple-start thread. The angle between the flanks is90° and the profile is triangular. The nut has an internal thread identicalto that of the screw. The rollers have a single-start thread with an anglethe same as that of the nut. This ensures there is no axial movement between the nut and the rollers. The rollers do not therefore need to be recycled.

The flanks of the roller thread are convex. At each end of the rollers thereis a cylindrical pivot and gear teeth. The pivots are mounted in the holesof the end rings, thus ensuring the rollers are equidistant. The end ringsare floated in the nut body and axially secured with circlips.

The gear teeth engage in gear wheels fixed in the nut. This guides therollers parallel to the axis to ensure perfect functioning.

RV and BRV screws

RV and

BRV

RVR

- 4 -

Types of roller screws (ctd.)

RVI satellite roller screws work on the same principle as RV and BRV screws except that theirnut system is reversed.

This means the rollers themselves rotate around the screw (instead of the nut in RV and BRVscrews) and move axially within the nut.

Apart from the screw threading where the rollers orbit, the journal is smooth and can have a specialshape (e.g.: antirotation).

The nut is threaded along its entire length and is much longer than on RV and BRV screws. It governs the overall travel of the complete screw and therefore limits it if needed.

RVI screws

The RVD differential screw is actually a variant of the RV and BRV screws.

Its components, expertly calculated and adjusted, are used to produce extremely fine threads(less than 0.02 mm).

The movement of the rollers in this somewhat complex mechanism does however prevent a wide range of travel.

The nuts are larger than on the RV and BRV types.

RVD screws

RVI

- 5 -

Identification system

RV 210 / 30. 5. R3. 6-- ---

Design RV = ground thread, non-recycling rollersBRV = rolled thread, non-recycling rollersRVR = ground thread, recycling rollersRVI = ground thread – reverse systemRVD = ground thread – differential screw

Nut types 1 = single nut2 = split nut3 = double nut

Seal 0 = without wipers1 = with wipers

Thread direction R = rightB = right/leftL = left

Thread accuracy G1 = 6 µm/300 mmG3 = 12 µm/300 mmG5 = 23 µm/300 mmG9 = 200 µm/1000 mm (BRV only)

Screw diameter d0 in mm

Nominal lead P in mm

6-digit number to identify customer’s specification

Nut design 1 = cylindrical nut6 = nut with flange at one end7 = nut with central flange8 = special nut design

Example

- 6 -

Accuracy

Efficiency

AdvantagesHigh axial load capacityLong lifespanHigh efficiencyNo backlashExtremely high rigidity

Accuracy greater than 6 µm/300 mmHigh rotation speed (RV and BRV systems)Small leads (from 0.25 mm)with wide diameters (system RVR)Fast acceleration and deceleration

Rollvis satellite roller screws achieve high rates of mechanical efficiency. The figure opposite shows efficiency rates η1 for the ascent and η2 for the descent,according to the helix angle. The efficiency of a trapezoidal thread screw is shownfor comparison. Satellite roller screws, unlike friction screws, are not self-locking.

Machine toolsMeasuring machinesSpecific machines (benders)RoboticsAeronautics (aeroplanes and helicopters)Space (rockets and satellites)

Defence (tanks, cannons, missiles, etc.)Oil industryNuclear industryMedicalChemical industryOptical

TelescopesGraphicsLaser machinesInjection moulding machinesCar industry

Positioning satellite roller screws are supplied in tolerance classes G1, G3and G5 and transport satellite roller screws (type BRV) in tolerance class G9.

Satellite roller screws are divided into tolerance classes based on DIN69051, part 3 (ball screws). The determining factor is the lead error V300p

referred to a thread length of 300 mm.

The table oppositeshows the tolerance classes:

Tolerance Cl

G1G3G5G9

V300p

6 µm/300 mm

12 µm/300 mm

23 µm/300 mm

200 µm/1000 mm

Lead errorThe lead error ep relative to effective travel Lu is calculated for the transportsatellite roller screw by the following formula:

Lead errors ep for positioning satellite roller screws are shown in the tableopposite. For tolerance classes G1 and G3, the lead and torque diagramsare supplied with the screws.

Lead is checked by a 3D measuring machine or on a measuring benchequipped with a laser interferometer.

ep = 2 . Lu . V300p1000

more than

315 mm400 mm500 mm630 mm800 mm1000 mm1250 mm1600 mm2000 mm2500 mm

315 mm400 mm500 mm630 mm800 mm1000 mm1250 mm1600 mm2000 mm2500 mm3150 mm

G1 G3 G5

LuEp in microns

for tolerance class up to

678910111315

1213151618212429

2325273035404654657793

Lead accuracy symbols according to DIN 69051/3

P nominal lead

e0 difference between required lead and nominal lead

V300p difference between actual and nominal lead over 300 mm

ep difference between actual and nominal lead over a length Lu

Vup travel variation over a length Lu

V2πp travel variation over one revolution

Lu effective travel

ApplicationsRollvis satellite roller screws have proved their superior worth in many fields of applications such as:

100

90

80

70

60

50

40

30

20

10

1 2 3 4 5 6 7 8 9 10

η1

η2

Satellite roller screw

Trapezoidal thread screw

Effic

ienc

y in

%

Helix angle ϕ in deg.

- 7 -

Geometry

Nut geometry and shape

SINGLE NUTS

• Nuts in one piece with axial backlash

• Wipers (if requested by the customer)

SPLIT NUTS:• Nuts in two pieces, preloaded,

without backlash• Same dimensions as single nuts• Reduced load capacities• Wipers

(if requested by the customer)

DOUBLE NUTS:• Two single nuts, preloaded,

without backlash• Same load capacities as single nuts• About twice as long as single nuts• Wipers

(if requested by the customer)

Shape A Shape B

60° 60°45° 30°

FLANGE SHAPES

Standard satellite roller screws are available with 3 nut designs:• single nut (ES)• split nut (EF)• double nut (ED)

Single nuts have low axial backlash of 0.01 to 0.03 mm. The split cylindrical nut is preloaded by clamping the two halves of the nut in a housing. A precision spacer ring is mounted between the two halves to maintainthe required level of preloading. Split nuts with a flange at one end have a spacer ring designed to hold thehalves apart. The halves are aligned by a parallel key. Double nuts are preloaded in the same way as split nuts.

- 8 -

Preloaded nuts are used to eliminate backlash and increase rigidity.

Preloading should be carefully calculated to achieve the highest rate of efficiency and thelongest possible lifespan (see figure above).

For preloaded nuts, in addition to the individual loads F1…Fn, preload Fv must also be taken into account to determine the mean load Fm. This yields new individual loads F1v…Fnv.

If for example an absence of backlash is required for all operational loads, preload Fv mustbe selected according to the maximum load Fmax.

If a satellite roller screw only needs to be backlash-free for a specific load, preload Fv

should be selected according to the corresponding load Fn.

Resulting load depending on preload Fv

An axial load on a preloaded nut system increases the load of one of the halves and relieves the other fromthe preloading force. The resulting load can be estimatedby the following equations:

Loaded half of nut:

Fnv(1) = Fv + 0.65 . Fn [N] if Fn < 2.83 . Fv [N]Fnv(1) = Fn [N] if Fn ≥ 2.83 . Fv [N]

Relieved half of nut:

Fnv(2) = Fv - 0.35 . Fn [N] if Fn < 2.83 . Fv [N]Fnv(2) = 0 [N] if Fn ≥ 2.83 . Fv [N]

Unless the customer otherwise requests, split and double nuts are preloaded in the standardversion to a maximum of 5% of the dynamic load capacity.

Fv =Fmax [N]2.83

Fv = Fn [N]2.83

Preloading

F1…Fn [N] : individual loadsFv [N] : preloading forceFnv [N] : load resulting from the individual load and preloadingFma [N] : mean load taking into account preloading

F1

FV

F2

- 9 -

Preloading examples

Flange nut Cylindrical nut

Preloading with rigid spacer (thickness calibrated by Rollvis SA)

Flange nut Cylindrical nut

Preloading with elastic washers

Elastic washers

- 10 -

Mean speed and axial load

For variable speed and load, lifespan should be calculated with meanvalues nm and Fm.

For variable speed and constant load with speed n, the mean speednm is used (figure below).

For a variable load at constant speed, the mean load Fm is used (figure below).

For a variable load at variable speed, the mean load Fm is used.

nm =q1 .n1 + q2 .n2 + …[min-1]

100 100

Fm = F13. q1 + F2

3. q2 + …[N]

100 100

3

Fm = F13. q1 . n1 + F2

3. q2 . n2 + …[N]

100 nm 100 nm

3

For a variable linear load at constant speed, the mean load Fm is used(figure below).

Fm =Fmin + 2 . Fmax [N]

3

nm [min-1] : mean speed n1…nn [min-1] : individual speedsq1…qn [%] : time percentageFm [N] : mean loadF ; F1…Fn ; Fmin; Fmax [N] : actual forces

- 11 -

Nominal lifespan

The nominal lifespan L10 or Lh of a satellite roller screw is attained with a probability of 90%.

If greater reliability is required, the nominal lifespan L10 or Lh must be multiplied by the reliability factor fr(table opposite).

Modified lifespan Ln = L10 . fr [revolutions]

or Lhn = Lh . fr [h]

Reliability %

909596979899

fr

10.620.530.440.330.21

Nominal lifespan of single nuts (with backlash)

The nominal lifespan of single nuts is calculated by the following formula:

or

L10 = (C )3.106 [revolutions]

fm

Lh =L10 [h]

nm . 60

If the lifespan is predetermined, the dynamic load capacity is calculated as follows: C = Fm . L10 [N]106

3

The lifespan in actual hours LhN is calculated by the following formula:

FN = Lifespan of satellite roller screwsExpected lifespan of the machine

The utilisation factor fN is calculated as follows:

LhN =Lh [h]fN

Ln [revolutions] : modified lifespan (revolutions)Lhn [h] : modified lifespan (hours)L10 [revolutions] : nominal lifespan (revolutions)Lh [h] : nominal lifespan (hours)LhN [h] : lifetime in actual hoursfr [-] : reliability factor

C [N] : dynamic load capacityFm [N] : mean load (single nut with backlash)Fma [N] : mean load (preloaded nut)nm [min-1] : mean speedfN [-] : utilisation factor

L10(1) = ( C )3.106 [revolutions]

Nominal lifespan of preloaded nutsFor preloaded nuts, it is first necessary to calculate the lifespan of each half of the nutwith the corresponding dynamic load capacity C and the mean axial load Fma

(including preload). The total lifespan L10 of the preloaded nut is obtained with the two lifespan values L10(1) and L10(2) (in revolutions).

Fma(1)

L10(2) = ( C )3.106 [revolutions]

Fma(2)

L10 = (L10(1)-10/9 + L10(2)

-10/9)-9/10

[revolutions]

- 12 -

Rigidity

Case 1 : fkn = 0.25 Case 3 : fkn = 2.0

Case 2 : fkn = 1.0 Case 4 : fkn = 4.0

Satellite roller screw rigidityThe overall rigidity Cges of a satellite roller screw is made up of thefollowing individual rigidity values:Cme nut rigidityCSp screw rigidity

CL bearing rigidityCu rigidity of the surrounding

construction

Nut rigidity Cme

The rigidity Cme of a complete satellite roller screw nut can be approximatedwith the following formula:

Cme = fm . fK . Fn1/3 [N/µm]

fm for single nut ES = 0.75fm for split nut EF = 1fm for double nut ED = 1.5

The following condition is set for Fn for the Cme values shown in thetable for standard preloading:

Fn = 2.83 . FV [N]

Nut rigidity CS

Nut rigidity CS can be determined by the following simplified formula:

CS = 164 . d02

[N/µm]L

Permissible buckling force Fknzul at rotation speed n = 0Permissible buckling force can be calculated by the following formula:

Fknzul = 0.8 . 101.6 . fkn . d04

[kN]L2

Fv [N] : preloading forceFn [N] : axial loadCme [N/µm] : nut rigidityCs [N/µm] : screw rigidity fk [N2/3/µm] : rigidity factor

fm [-] : correction factorL [mm] : free screw lengthd0 [mm] : nominal diameter of screwFknzul [N] : permissible buckling force fkn [-] : correction factor for bearing type

- 13 -

Rotation speed

Case 1 : fkr = 0,32 Case 3 : fkr = 1,55

Case 2 : fkr = 1,0 Case 4 : fkr = 2,24

Permissible rotation speed and axial load Satellite roller screws are restricted by the inter-nal configuration of the nut, the bearings at theend of the screw and the critical number of revo-lutions nkr due to flexural vibration.

The value of the permissible speed applied can be:

RV : d0 . n ≤ 140'000RVR : d0 . n ≤ 32'000

Critical speed nkr with axial load Fn = 0Critical speed is influenced by the axial load. It can be calculated on request for every satellite roller screw configuration.

When the correct screw end bearings are chosen, their maximum speed will have no effect on thedesired speed. All that needs to be determined is the critical speed nkr for flexural vibration.

The critical speed nkr for flexural vibration can be calculated by the formula below. The correctionfactor fkr depends on the type of bearing and the clamping conditions (figure above).

The calculation is based on the assumption that satellite roller screw nuts provide no guidanceand the bearings at the screw end are considered rigid in the radial direction.

n [min-1] : rotation speednkr [min-1] : critical rotation speednkrzul [min-1] : permissible critical rotation speedL [mm] : free screw length

d0 [mm] : nominal diameter of screw fkr [-] : correction factor for bearing type0,8 [-] : safety factor

The permissible critical speed can be calculated by taking the bearing type into account:

nkrzul = 0.8 . nkr . fkr [min-1]

nkr = 108 . 106 . d0 . 1 [min-1]L2

L L

L L

- 14 -

Driving torqueAll the values for motor rating can be calculated by the formulas below.Note that the load-free torque Mv must be taken into account for preloaded nuts (based on preloading Fv). For single nuts with backlash, the formula is: Mv = 0 [Nm]

Load-free torque

Motor driving torque MM at constant speed

Mv = Fv . P . i . c [Nm]2000 . π

« Ascent » load torque ML1 = P . i . F [Nm]2000 . π . η1

Motor driving torque MM = (MV + ML1,2 + MR . i) [Nm]

« Descent » load torque ML2 = P . i . F . η2 [Nm]2000 . π

Motor driving power PM = MM . nM [W]9.55

The frictional forces of the guide slideway must be taken into account in feed force F.

If, as is possible in « Descent » mode, the motor driving torque is negative, the motor must have a brake.

Driving torque

d [mm] : external diameter of screwd2 [mm] : core diameter of screwP [mm] : screw leadL [mm] : length of satellite roller screwmT [kg] : mass to moveD1 [mm] : diameter of driving wheelD2 [mm] : diameter of driven wheeli [-] : reduction ratioF [N] : feed forceFv [N] : preloading force

Fa [N] : acceleration forceMv [Nm] : load-free torqueML1 [Nm] : « ascent » load torque at constant speedML2 [Nm] : « descent » load torque at constant speedMM [Nm] : motor driving torqueMLa [Nm] : load torque on acceleration MB [Nm] : acceleration torqueMMa [Nm] : motor driving torque on accelerationMR [Nm] : frictional torque of screw bearingsJM [kgm2] : moment of inertia of motor

nM

JM

J1

MM

v

F

J2

i = D1D2

Screw lead P

- 15 -

JR [kgm2] : rotary moment of inertia of screwJT [kgm2] : translatory moment of inertia of screwJ [kgm2] : moment of inertia J1 [kgm2] : moment of inertia of driving wheelJ2 [kgm2] : moment of inertia of driven wheelPM [W] : driving power of motor at constant speedPMa [W] : driving power of motor on accelerationsB [mm] : acceleration pathtB [s] : acceleration timev [m/s] : speed rate

nM [min-1] : rotation speed of motorη [-] : mechanical efficiency of gearingη1 [-] : mechanical efficiency of satellite roller screw

for « ascent » η1 = 0,71…0,89η2 [-] : mechanical efficiency of satellite roller screw

for « descent » η2 = 0,61…0,85c [-] : coefficient of friction referred to preloading

c = 0,1…0,5(for efficiencies η1 + η1 see page 6)

The rotary moment of inertia of screw JR is a rough estimate.We shall be happy to calculate the exact value on request.

Motor driving torque MMa with acceleration

Load torque MLa = P . i . (F + F2) [Nm]2000 . π . η1

Motor speed nM = v . 6 . 104

[Min-1]P . i

Rotation speed reached after acceleration nM = 120 . sB [Min-1]P . i . tB

Path travelled during acceleration sB = nM . tB . P . i [mm]120

Motor driving power PMa = Mma . nM [W]9.55

Acceleration torque MB = f (nM) MB = nM . J [Nm]9.55 . tB . η

Acceleration torque MB = f (sB) MB = 4 . π . sB . J [Nm]P . i . tB2 . η

Acceleration time tB = f (nM) tB = nM . J [s]9.55 . MB . η

Acceleration time tB = f (sB) tB = 4 . π . sB . J [s]P . i . MB . η

Rotary moment of inertia (screw) JR = 4.8 . (d1 + d2)4 . L . 10-14 [kgm2] (for steel)

Motor driving torque MMa = (Mv + MLa + MR . i + MB) [Nm]

Sum of reduced moments of inertia J = JM + J1 + i2 (JR + JT + J2) [kgm2]

Translatory moment of inertia JT = mT .( P )2

. 106 [kgm2]2 . π

- 16 -

Calculation example

Satellite roller screws RV 20 x 5

Nominal diameter : d0 = 20 mmLead : P = 5 mmNut : split nut (EF), preloadedMounting position : horizontalLoad direction : both sidesRapid mode : one side, opposite to working load

Operating mode

Peak load

Roughing feed

Finishing feed

Rapid

Time percentageq [%]

q1 = 5

q2 = 40

q3 = 50

q4 = 5

Rotation speedn [min-1]

n1 = 15

n2 = 110

n3 = 70

n4 = 1700

Axial load Fn [N]

F1 = 8300

F2 = 4500

F3 = 4200

F4 = 1150

N°

1

2

3

4

Mean speed nm = 5 . 15 + 40 . 110 + 50 . 70 + 5 . 1700 = 165 min-1

100 100 100 100

PreloadingPreloading is defined for the « finishing feed » operating mode (F3 = 4200 N).

Fv = 4200 = 1484 N2.83

Load on nut half 1Nut half 1 is loaded in operating modes 1, 2 and 3.

As F1, F2 eand F3 ≥ 2,83 Fv:

Nut half 1 is only partly loaded in operating mode 4.

As F4 = 1150 N < 2,83 FV:

Fnv = Fn hence F1V = 8300 NF2V = 4500 NF3V = 4200 N

F4v = 1484 - 0,35 . 1150 = 1082 N

Mean load

Nut 1

Nut 2

Load on nut half 2Half nut 2 is loaded in operating mode 4.Half nut 2 is not loaded in operating modes 1, 2 and 3.

As F4 < 2,83 . Fv:

F1v = F2v = F3v = 0

F4v = 1484 + 0.65 . 1150 = 2232 N

Fma(1) = 83003. 15 . 5 + 45003 . 110 . 40 + 42003. 70 . 50 + 10823 . 1700 . 5 = 3511 N165 100 165 100 165 100 165 100

3

Fma(2) = 22323. 1700 . 5 = 1789 N165 100

3

LifespanDynamic load capacity of a nut C = 23 400 NHalf nut 1

Half nut 2

L10(1) = (23400)3.106 = 296 . 106 revolutions

3511

L10(2) = (23400)3.106 = 2237 . 106 revolutions

1789

- 17 -

Nut rigidity Cme = 1 . 42.5 . 42001/3 = 686 N/µm

Bearing rigidity C1 = 850 N/µm (assumed value)

Driving torque MM is calculated for the peak load of F1 = 8300 N.The screw is directly driven by the motor (i = 1).

Load-free torque:

Load torque:

Frictional torque of bearings:

Peak driving torque of motor at constant speed:

Motor driving power reaches its peak in rapid mode with F4 = 1150 N.

Load torque:

Peak driving power of motor at constant speed:

Driving torque

Mv = 1484 . 5 . 1 . 0.43 = 0.5 Nm2000 . π

PMmax = (1.05 + 0,5 + 0.2) . 1700

= 312 W9.55

ML1 = 5 . 1 . 8300 = 7.6 Nm2000 . π . 0.87

ML4 = 5 . 1 . 1150 = 1,05 Nm2000 . π . 0.87

MR = 0.2 Nm (assumed)

MMmax = 0.5 + 7.6 + 0.2 = 8.3 Nm

Total lifespan

Lifespan in hours (with utilisation factor fN = 0,6)

L10 = [(296 . 106)-10/9 + (2237 . 106)-10/9)]-9/10

L10 = 270 . 106 revolutions

LhN = 270 . 106

= 45 450 h165 . 0.6 . 60

Satellite roller screw rigidity

Free length between fixed bearing and nut 1 = 1000 mmNominal diameter of screw d1 = 20 mm

CS = 164 . 202

= 66 N/µm1000

Total rigidity of satellite roller screw system 1 = 1 + 1 + 1 Cges = 56 N/µmCges 686 66 850

- 18 -

Lubrication

Circulating mineral oils with EP additives to enhance resistance to agingand corrosion in compliance with CL based on DIN 51517, part 2, areespecially suitable for the lubrication of satellite roller screws. Speed,ambient temperature and operating temperature are determining factorsin the choice of viscosity.

The amount of oil required depends on the screw diameter, the numberof supporting rollers and the amount of heat to dissipate. 1 cm3/h (for small screw diameters) to 30 cm3/h (for large screw diameters) canbe used as reference values.

The shortest possible lubrication intervals (…5 minutes) are recommendedfor high loads and longer intervals (5 minutes to 1 hr) for low loads.Automatic lubrication is recommended for high loads and speeds.

For immersion lubrication, the oil level should be such that the bottommostroller is completely submerged in the oil. The amount of oil and the oil-change intervals depend on the loading and installation.

The viscosity of the oil should be chosen to enable an adequate film oflubricant to form on the contact surfaces.

Figure a shows the operating viscosity νκ to achieve for the mean speedof the satellite roller screw and screw diameter.

Viscosity νκ ensures a state of lubrication to fulfil the nominal lifespanprovided the lubrication system is free of foreign bodies.

Nominal viscosity can be calculated on the basis of viscosity νκ with the viscosity-temperature diagram (diagram ν-t, figure b) and the operatingtemperature. Nominal viscosity is the viscosity of oil at 40°C. Viscosity classes ISO VG (DIN 51519) are plotted in diagram ν-t.

Oil lubricationFigure a shows the nominal diameters of RV satellite roller screws. Thediameters of RVR satellite roller screws are slightly different. The requisiteoperating viscosity values can be obtained by interpolation.

Intermediate values can be obtained from the steps. These must be roundedup to the nearest viscosity value.

The operating temperature must be known or estimated to calculatenominal viscosity. The operating temperature must be measured on thenut after stabilisation. A suitable oil can be found in oil suppliers’ lists withthe nominal viscosity at 40°C. In general, an operating temperature of30°C can be taken as a basis for selecting a lubricant.

Example: Satellite roller screw RV 39 x 10Mean operating speed: nm = 1400 min-1

Operating temperature (estimated): t = 25 °C

In figure a, for a number of revolutions nm = 1400 min-1 and a nominal diameter of 39mm, the nominal viscosity is νκ= 33 mm2/s. In diagram ν-t (figure b), the 25°C temperature and 34 mm2/s viscositylines intersect between ISO VG 15 and ISO VG 22. The oil to choose willbe in viscosity class VG 22.

A suitable CLP (DIN 51517) or HLP (DIN 51525) oil can be selectedfrom this class.

Grease lubricationThe best grease lubricants to use are KP (DIN 51825, part 3) with a consistency factor of 2.

Lubrication intervals depend on the screw arrangement, size and operating conditions. Rollvis can provide recommendations for any type of application.

As a general rule, the same lubricants are used for satellite roller screws as for roller bearings, i.e. either oil or grease. The type of lubricant used mostlydepends on operating and maintenance conditions. Unless the customer explicitly instructs otherwise, standard Rollvis grease is applied at the factory.

- 19 -

10

15

20

30

40

50

60708090

100

150

200

10 12 15 20 23 27 30 36 39 48 60 80 100 120

Nominal diameter d0 [mm]

νκ

oper

atin

g vi

scos

itym

m2

s[

]

Mean screw rotatio

n speed nm [min

-1 ] 300

200

150

100008000

6000

5000 4000

30002000

14001000

900800 700

600500

400

Figure a

10

20

30

40

50

60

70

80

90

100

110

120

4 6 8 10 20 30 40 60 100 200 300

Ope

ratin

g te

mpe

ratu

re t

[°C

]

mm2

s[ ]νκ operating viscosity

10006804603202201501006846

3222

15

10

1500

Figure b

- 20 -

AssemblyIf possible, the nut and screw should not be dismantled. However,should this be necessary, an assembly sleeve must be used.External diameter d3 of assembly sleeve:

0

d3 = d2- 0,05

(d2 = screw core diameter)

RV screws always have a multiple-start thread. If the friction torque is dif-ferent after the nut is reassembled, the nut must be taken off again andrefitted on the next thread start until friction torque is correct!

CAUTION

Screw assemblyThe following points must be followed when assembling the screw:1 • Align the screw and slide guideways axially parallel.2 • Fix the nut in housing.3 • Run the nut along the entire length of the thread and check the screw

for ease of movement.

HandlingPlease read the following handling instructions carefully.

To ensure optimal operation and a long lifespan for satellite roller screws, the following points must be scrupulously complied with.

If in doubt, please contact Rollvis.

Satellite roller screws are greased prior to shipment (unless oil lubrication is requested).

Do not remove this grease. Only use this type of grease for relubrication.

Handle screws with care: do not drop them or damage the thread.

Do not unscrew the nut (or only with an assembly sleeve).Carefully align satellite roller screws parallel to the guideways.Alignment errors will damage satellite roller screws.

Only remove satellite roller screws from their original packing just before installation.

Avoid applying radial forces to the nut.

Lubrication

Transport

Installation

Storage

Bending

Handling advice

- 21 -

Type RV ........ diameters of 3.5 to 12 22





Type RV ...... diameters of 80 to 150 27

Type BRV ......... diameters of 8 to 44 28

Type RVR ...... diameters of 8 to 125 29

Preferenceprogram

- 22 -

D2 L4

[mm

]

[mm

]

L1

[mm

]W

itho

utw

iper

s

L1

[mm

]W

ith

wip

ers

L2

[mm

]

L3

[mm

]

Type D X P d0 d1 d2

[mm

]

[mm

]

[mm

]

C Co FK

[kN

]

[kN

]

[N2/

3 /µm

]

C Co

[kN

]

Single nut, with backlash

and double nut

Split nut,preloaded,

without backlash

Fv Mv

[N]

[Ncm

]

Split nuts,preloaded,preloading

torque

[kN

]

FK

[N2/

3 /µm

]

D1

[mm

]

Effi

cien

cy

Maximum backlash of single nuts: 0.03mm (can be less on request).If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).

Type RV - Ground screws

P ---------- LeadD --------- Reference diameterN --------- Number of startsd0 ------- Nominal diameter

d1 ------- External diameterd2 ------- Thread bottom diameterC --------- Dynamic load capacityCo ------- Static load capacity

Fk -------- Rigidity factorFv -------- Preloading forceMv ------ Load-free torque due to preloading

Terms used in tables

N

RVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRV

0.860.850.880.880.840.880.890.890.900.830.870.890.890.890.900.800.860.880.890.890.790.850.870.890.890.90

3.5 x 15 x 15 x 25 x 37 x 17 x 27 x 37 x 47 x 58 x 18 x 28 x 38 x 48 x 58 x 610 x 110 x 210 x 310 x 410 x 512 x 112 x 212 x 312 x 412 x 512 x 8

3.54.54.54.577777888888

10.510.510.510.510.5121212121212

3.624.624.714.787.097.167.237.287.338.098.178.248.308.358.3810.5910.6410.7010.7510.7912.0912.1412.2212.2512.3212.42

3.354.354.173.976.896.766.626.476.327.897.767.637.497.337.34

10.3810.3110.2110.109.9811.8911.8111.7411.6511.5611.13

5.26.54.53.47.45.94.84.23.47.25.84.74.23.73.211.88.37.16.66.012.08.17.16.36.65.2

3.23.93.93.75.55.75.65.55.05.45.75.55.65.35.18.89.19.09.19.08.69.09.18.99.17.8

20.520.814.511.829.220.316.514.412.427.619.115.213.511.910.834.829.223.320.518.332.527.422.018.817.212.8

1519191919191919192121212121212624242424302626262626

3539393941414141414141414141414846464646504646464646

3131313131313131313131313131313131313131313131313131

4141414141414141414141414141414141414141414141414141

16.020.320.320.320.320.320.320.320.322.322.322.322.322.322.327.325.325.325.325.331.327.327.327.327.327.3

1010101010101010101010101010101010101010101010101010

23333333333333333333333333

410520300210480300210170140570360260210170140600410300240200760520390310260170

3.04.04.04.04.04.04.04.04.05.05.05.05.05.05.06.06.06.06.06.08.08.08.08.08.08.0

8.310.37.25.311.79.37.66.65.411.59.27.56.75.85.018.713.111.310.59.619.012.811.210.010.58.3

6.57.87.87.5

10.911.411.111.010.010.711.411.011.110.710.217.618.117.918.217.917.218.018.117.818.115.7

32.633.023.018.846.332.326.222.919.643.830.424.121.418.917.155.346.436.932.629.151.643.534.929.927.320.4

33334444444444445555455555

- 23 -


D2 L4

[mm

]

[mm

]

L1

[mm

]W

itho

utw

iper

s

L1

[mm

]W

ith

wip

ers

L2

[mm

]

L3

[mm

]

Type ND X P d0 d1 d2

[mm

]

[mm

]

[mm

]

C Co FK

[kN

]

[kN

]

[N2/

3 /µm

]

C Co

[kN

]


and double nut


without backlash

Fv Mv

[N]

[Ncm

]


torque

[kN

]

FK

[N2/

3 /µm

]

RVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRV

0.840.860.880.890.890.900.820.850.870.880.880.890.900.810.840.860.870.880.890.890.800.840.860.870.880.890.89

15 x 215 x 315 x 415 x 515 x 615 x 820 x 220 x 320 x 420 x 520 x 620 x 820 x 1021 x 221 x 321 x 421 x 521 x 621 x 821 x 1023 x 223 x 323 x 423 x 523 x 623 x 823 x 10

151515151515

19.519.519.519.519.519.519.521212121212121

22.522.522.522.522.522.522.5

15.1415.2215.2515.3215.3715.4619.6519.7119.8019.8319.9419.9820.0421.1421.2121.2821.3321.3921.4921.5822.6522.7222.7922.8722.8923.0023.12

14.8114.7414.6514.5614.4714.1619.3219.2219.1519.0218.9718.6918.6220.8220.7220.6220.5220.4220.1919.9622.3222.2422.1522.0621.9721.7121.62

12.210.910.09.49.68.730.127.625.323.424.224.127.032.229.627.225.226.126.129.434.331.529.126.928.028.131.7

13.213.613.813.913.612.629.831.732.232.032.032.030.931.833.834.534.434.534.633.633.636.036.836.836.937.236.2

32.226.122.520.318.415.450.640.935.131.028.224.721.951.441.435.631.428.625.022.152.141.936.131.828.925.322.4

D1

[mm

]

343434343434424242424242424545454545454545454545454545

565656565656646464646464646868686868686867676767676767

353535353535555555555555555454545454545455555555555555

515151515151656565656565656464646464646465656565656565

35.735.735.735.735.735.743.743.743.743.743.743.743.747474747474747

46.746.746.746.746.746.746.7

141414141414202020202020202020202020202020202020202020

444444444444455555554444444

600460370310270210107084070059052041034012901030850730630500420149012001000860750600500

101010101010202020202020202525252525252530303030303030

19.317.415.915.015.213.947.843.740.237.138.438.242.951.146.943.239.941.541.446.754.450.046.242.744.444.650.3

26.327.327.627.827.325.359.763.364.364.064.064.061.963.567.768.968.869.069.367.267.271.973.573.573.974.572.4

51.141.535.732.229.224.480.364.955.749.144.839.234.781.565.756.549.845.339.735.182.766.557.250.445.940.235.6

555555555555555555555555555

Effi

cien

cy

Maximum backlash of single nuts: 0.03mm (can be reduced on request).If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).





- 24 -

D2 L4

[mm

]

[mm

]

L1

[mm

]W

itho

utw

iper

s

L1

[mm

]W

ith

wip

ers

L2

[mm

]

L3

[mm

]


[mm

]

[mm

]

[mm

]

C Co FK

[kN

]

[kN

]

[N2/

3 /µm

]

C Co

[kN

]


and double nut


without backlash

Fv Mv

[N]

[Ncm

]


torque

[kN

]

FK

[N2/

3 /µm

]

D1

[mm

]

Effi

cien

cy







RVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRV

0.800.850.870.870.890.890.780.850.860.870.880.890.770.840.850.860.880.890.900.900.900.750.820.840.850.870.880.890.90

25 x 225 x 425 x 525 x 625 x 825 x 1027 x 227 x 427 x 527 x 627 x 827 x 1030 x 230 x 430 x 530 x 630 x 830 x 1030 x 1530 x 2030 x 3036 x 236 x 436 x 536 x 636 x 836 x 1036 x 1536 x 20

2424242424242727272727273030303030303030303636363636363636

24.1424.2824.3424.4024.5124.6027.1427.2927.3727.4027.5127.6230.1530.2930.3730.4030.5230.6330.8731.0531.2736.1536.2836.3736.4136.5436.6536.8037.12

23.8223.6323.5323.4223.2122.9826.8226.6526.5626.4326.2226.0029.8229.6529.5629.4329.2229.0128.4427.8126.4135.8335.6335.5635.4435.2435.1234.4833.88

49.141.939.440.647.553.055.346.944.345.753.860.370.861.057.253.950.455.557.767.231.067.557.956.052.548.544.759.766.2

46.651.352.151.952.451.851.757.158.258.259.158.764.572.773.874.176.275.371.676.942.862.170.573.773.975.374.975.777.9

63.343.839.035.230.727.565.244.739.936.031.228.073.250.344.640.435.231.325.122.213.267.446.141.237.232.028.323.619.9

5353535353535353535353536262626262626262627474747474747474

848484848484838383838383929292929292929258110110110110110110110110

6464646464646565656565657171717171717171717070707070707070

7878787878787979797979798585858585858585858484848484848484

55.555.555.555.555.555.555.255.255.255.255.255.264.764.764.764.764.764.764.764.764.776.776.776.776.776.776.776.776.7

2525252525252020202020202020202020202020202828282828282828

66666655555566666666666666666

16901140980860690570181012501080950770640213015001300115094079056044029524901800158014101160980710560

3535353535354040404040405050505050505050506565656565656565

78.066.562.564.475.384.187.874.570.372.685.395.7112.496.990.785.580.088.191.6106.749.1107.291.988.983.376.970.994.8105.1

93.2102.6104.2103.9104.8103.6103.5114.2116.4116.4118.2117.4129.1145.4147.5148.2152.3150.6143.2153.885.5124.1140.9147.4147.8150.5149.8151.4155.8

100.569.561.955.948.743.6103.471.063.357.149.644.5116.279.870.964.155.849.639.935.220.9107.173.165.559.150.845.037.431.6

55555555555555555555555555555

- 25 -

D2 L4

[mm

]

[mm

]

L1

[mm

]W

itho

utw

iper

s

L1

[mm

]W

ith

wip

ers

L2

[mm

]

L3

[mm

]


[mm

]

[mm

]

[mm

]

C Co FK

[kN

]

[kN

]

[N2/

3 /µm

]

C Co

[kN

]


and double nut


without backlash

Fv Mv

[N]

[Ncm

]


torque

[kN

]

FK

[N2/

3 /µm

]

RVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRV

0.730.820.840.850.870.880.890.900.900.840.880.890.900.900.820.870.880.890.900.890.820.840.860.870.880.880.890.890.90

39 x 239 x 439 x 539 x 639 x 839 x 1039 x 1539 x 2039 x 2544 x 644 x 1244 x 1844 x 2444 x 3048 x 548 x 1048 x 1548 x 2048 x 2548 x 3048 x 548 x 648 x 848 x 1048 x 1248 x 1548 x 1848 x 2048 x 24

3939393939393939394444444444484848484848484848484848484848

39.1539.2939.3539.4239.5439.7439.9240.1540.5044.3544.6544.9045.1245.2848.3548.6748.9949.2149.4349.6248.3048.3548.4648.5648.6648.7948.9249.0049.15

38.8238.6538.5438.4438.2438.1237.4936.9036.8043.5443.0342.4741.8841.2347.5447.0546.5345.9745.3844.7547.6347.5447.3847.2147.0446.7646.4946.3045.91

114.398.894.689.883.178.386.890.689.776.884.385.987.786.5155.6130.8138.1140.7151.5108.1153.5148.7139.0130.2137.1141.3142.0143.0164.1

98.5113.1117.6119.2121.8123.7120.5132.8125.9115.6120.3118.3114.9118.7191.9206.4207.9236.7224.2203.7209.2215.8221.4221.8224.0225.0219.2247.9242.5

89.561.554.549.542.738.130.827.024.055.739.031.827.624.570.348.839.635.231.027.289.581.670.261.956.650.745.844.340.5

D1

[mm

]

8080808080808080808080808080100100100100100100868686868686868686

116116116116116116116116116118118118118118150150150150150150122122122122122122122122122

9090909090909090908080808080113113113113113113113113113113113113113113113

1001001001001001001001001009090909090127127127127127127127127127127127127127127127

82.782.782.782.782.782.782.782.782.782.782.782.782.782.710310310310310310388.788.788.788.788.788.788.788.788.7

2828282828282828282828282828454545454545454545454545454545

66666666666666888888666666666

2910214018901690139011908606805502030127092072059025801680124098081069026002350197017001490126010901000850

808080808080808080100100100100100120120120120120120120120120120120120120120120

181.4156.8150.2142.5131.9124.4137.8143.7142.3122.0133.8136.3139.2137.3247.0207.6219.3223.3240.5171.7243.6236.1220.7206.6217.6224.2225.4226.9260.4

197.0226.2235.2238.4243.7247.4241.1265.5251.7231.2240.5236.7229.8237.4383.8412.7415.7473.4448.4407..5418.4431.7442.7443.6447.9450.1438.3495.7485.0

142.197.586.478.567.760.548.942.938.288.461.850.543.938.9111.677.562.955.949.243.1142.0129.5111.498.389.880.672.770.364.2

55555555566666555555666666666

Effi

cien

cy







- 26 -

D2 L4

[mm

]

[mm

]

L1

[mm

]W

itho

utw

iper

s

L1

[mm

]W

ith

wip

ers

L2

[mm

]

L3

[mm

]


[mm

]

[mm

]

[mm

]

C Co FK

[kN

]

[kN

]

[N2/

3 /µm

]

C Co

[kN

]


and double nut


without backlash

Fv Mv

[N]

[Ncm

]


torque

[kN

]

FK

[N2/

3 /µm

]

D1

[mm

]

Effi

cien

cy

Maximum backlash of single nuts: 0.03mm for RV 51 and 0.04mm for RV 60 to RV 75 (can be less on request).If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).





High capacity definition


RVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRV

0.810.860.880.890.900.870.880.890.890.820.860.870.880.890.900.900.810.860.880.890.900.900.800.860.880.890.770.840.860.860.880.870.880.89

51 x 551 x 1051 x 1551 x 2051 x 2560 x 1560 x 2060 x 2560 x 3060 x 660 x 1060 x 1260 x 1860 x 2060 x 3060 x 4264 x 664 x 1264 x 1864 x 2464 x 3064 x 3670 x 670 x 1270 x 1870 x 2475 x 575 x 1075 x 1575 x 1575 x 2075 x 2075 x 2575 x 30

51515151516060606060606060606060646464646464696969697575757575757575

51.3651.7451.9652.2352.4660.9961.2661.5161.7460.3760.6160.6760.9661.0461.4361.7864.3664.6864.9765.2365.4665.6569.3669.6869.9870.2575.3675.7076.0176.0176.3176.3176.5876.83

50.5550.1249.5348.9948.4158.5558.0257.4656.8759.5659.2759.0558.5358.3457.3856.1063.5563.0662.5461.9961.4160.7968.5568.0667.5567.0174.5574.0873.5873.5873.0773.0772.5371.97

172.0143.0153.9185.3186.5

----

162.3145.6139.4135.4167.2179.2154.5193.6166.8150.0169.9167.1174.3

------------

210.3224.6230.3252.9257.3

----

237.5252.3255.4253.6297.4265.3250.4279.3302.4306.1341.4329.2333.7

----------- -

73.250.341.135.632.7

----

80.061.355.644.844.134.429.387.260.649.142.938.235.9

------------

102102102102102122122122122110110110110110110110115115115115115115130130130130150150150150150150150150

147147147147147166166166166150150150150150150150180180180180180180172172172172210210210195195195195195

125125125125125

----

106106106106106106106118118118118118118140140140140175175175

-175

---

139139139139139189189189189124124124124124124124129129129129129129170170170170191191191233191233233233

105105105105105

----

113.2113.2113.2113.2113.2113.2113.2118118118118118118

133.7133.7133.7133.7153153153

-153

---

5050505050----

4040404040404045454545454550505050636363-

63---

88888----888888888888810101010101010-

10---

2930192014301140940

----

31902360209015501430102076034302280170013601130960

------------

140140140140140

----

180180180180180180180200200200200200200

------------

273.1227.0244.2294.1296.1497.3444.4402.3367.2257.7231.1221.3214.9265.4284.5245.2307.3264.7238.1269.6265.3276.7406.6347.6310.1338.1568.4525.3469.6643.8492.3569.8525.3481.1

420.6449.2460.6505.8514.61211.81191.01163.91134.5474.9504.7510.8507.3594.7530.5500.8558.6604.9612.3682.8658.5667.3724.0781.9786.9773.9918.01227.01261.01862.31265.01812.81798.91754.3

116.279.865.256.552.097.2

184.175.369.1127.097.288.371.270.054.646.4138.596.278.068.260.757.0

160.5110.589.076.5171.8121.097.9

115.384.698.788.580.6

5555555556666666666666666655555555

- 27 -

D2 L4

[mm

]

[mm

]

L1

[mm

]W

itho

utw

iper

s

L1

[mm

]W

ith

wip

ers

L2

[mm

]

L3

[mm

]


[mm

]

[mm

]

[mm

]

C Co FK

[kN

]

[kN

]

[N2/

3 /µm

]

C Co

[kN

]Single nut,

with backlashand double nut


without backlash

Fv Mv

[N]

[Ncm

]


torque[k

N]

FK

[N2/

3 /µm

]

D1

[mm

]

Effi

cien

cy

Maximum backlash of single nuts: 0.04mm for RV 80 to RV 92 and 0.05mm for RV 100 to RV 150 (can be less on request).If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).





High capacity definition


RVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRVRV

0.790.820.840.850.870.880.880.890.890.840.860.880.850.840.870.860.880.890.860.870.880.830.830.850.850.870.870.870.850.870.880.820.840.860.860.810.830.850.86

80 x 680 x 880 x 1080 x 1280 x 1880 x 2080 x 2480 x 3080 x 3692 x 1292 x 1892 x 24100 x 15100 x 15100 x 20100 x 20100 x 25100 x 35100 x 18100 x 24100 x 30120 x 15120 x 15120 x 20120 x 20120 x 25120 x 25120 x 30120 x 18120 x 24120 x 30135 x 15135 x 20135 x 25135 x 30150 x 15150 x 20150 x 25150 x 30

808080808080808080929292999999999999100100100120120120120120120120120120120135135135135150150150150

80.3780.4980.6180.7481.0081.0981.2881.5381.7792.6993.0193.30100.04100.04100.35100.35100.65101.23101.02101.32101.60121.00121.00121.37121.37121.68121.68121.98121.04121.30121.64136.06126.38136.70137.00151.06151.39151.71152.02

79.5679.4179.2779.1278.5678.3978.0477.4876.9191.0890.5890.0797.6197.6197.1197.1196.6095.5298.6098.0897.55

118.62118.62118.13118.13117.63117.63117.11118.61118.10117.59133.62133.14132.65132.14148.63148.15147.66147.10

---------------------------------------

---------------------------------------

---------------------------------------

138138138138138138138138138160160160200200200200200200185185185240240240240240240240220220220280280280280320320320320

180180180180180180180180180220220220245245245245245245260260260300300300300300300300260260260345345345345385385385385

130130130130130130130130130210210210260

-260

-260260230230230280

-280

-280

--

230230230

--------

158158158158158158158158158234234234281304281304281281260260260300354300354300354354260260260393393393393437437437437

141.7141.7141.7141.7141.7141.7141.7141.7141.7163.7163.7163.7203

-203

-203203188188188243

-243

-243

--

223223223

--------

50505050505050505063636363-

63-

6363636363100

-100

-100

--

100100100

--------

10101010101010101010101010-

10-

101010101010-

10-

10--

101010--------

---------------------------------------

---------------------------------------

399.8375.3384.8374.0394.5411.3423.1426.9399.4751.0817.0879.0904.0983.3829.0895.8858.0893.0751.0793.0814.01135.01172.01042.01071.0986.01011.0945.0778.0786.0818.0

1393.01284.01214.01122.01536.01426.01337.01263.0

738.9771.9942.1968.5962.3954.6957.0954.6860.21791.01844.01850.02581.03533.02609.03545.02646.02598.01921.01891.01923.03414.04645.03466.04683.03535.04764.04726.02534.02537.02577.06033.06145.06264.06154.07285.07481.07571.07601.0

154.2131.7119.3109.587.482.475.768.259.0169.8137.2118.0139.9155.5119.8133.5107.690.8124.8106.096.4155.2171.7133.1146.7119.1132.0120.4138.6118.4106.5194.3167.0149.8134.9210.5181.9161.7147.3

666666666666555555666555555566655555555

- 28 -

D2 L4

[mm

]

[mm

]

L1

[mm

]W

itho

utw

iper

s

L1

[mm

]W

ith

wip

ers

L2

[mm

]

L3

[mm

]


[mm

]

[mm

]

[mm

]

C Co FK

[kN

]

[kN

]

[N2/

3 /µm

]

C Co

[kN

]


and double nut


without backlash

Fv Mv[N

]

[Ncm

]


torque

[kN

]

FK

[N2/

3 /µm

]

D1

[mm

]

Effi

cien

cy

Maximum backlash of single nuts: 0.03mm for BRV 8 and 0.04mm for BRV 12 and BRV 44 (can be less on request).If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).

Type BRV - Rolled screws





BRVBRVBRVBRVBRVBRVBRVBRVBRVBRVBRVBRVBRVBRVBRVBRV

0.890.890.890.880.890.880.890.860.870.890.860.890.890.880.900.90

8 x 512 x 412 x 515 x 415 x 520 x 520 x 1023 x 423 x 523 x 1027 x 527 x 1030 x 1039 x 1039 x 2544 x 30

812121515

19.519.522.522.522.5272730393944

8.312.2512.3215.2515.3219.8320.0422.7922.8723.1227.3727.6230.6339.7440.5045.28

7.4511.6511.5615.6515.5619.0218.6222.1522.0621.6226.5626.0029.0138.1236.8041.23

2.64.44.67.06.616.312.620.318.814.730.942.2238.854.862.760.5

3.76.26.39.69.722.321.725.725.725.340.741.052.786.588.183.0

9.414.813.517.716.024.421.928.425.117.731.522.124.630.119.024.5

21262634344242454545535362808080

41464656566464676767838392116116118

31313135355555555555656571909080

4141415151656565656579798510010090

22.327.327.335.735.743.743.746.746.746.755.255.264.782.782.782.7

10101014142020202020202020282828

3334444444556666

170310260370310590340100086050010806407901190550590

588101020203030304040508080100

4.17.07.3

11.210.525.920.032.329.923.549.267.061.787.199.696.1

7.512.512.719.319.544.843.351.551.550.781.582.2105.4173.2176.2166.2

14,923.621.528.225.438.734.745.139.828.049.935.139.147.730.138.9

4555555555555556

- 29 -

D2 L4

[mm

]

[mm

]

L1

[mm

]W

itho

utw

iper

s

L1

[mm

]W

ith

wip

ers

L2

[mm

]

L3

[mm

]


[mm

]

[mm

]

[mm

]

C Co FK

[kN

]

[kN

]

[N2/

3 /µm

]C Co

[kN

]


and double nut


without backlash

Fv Mv

[N]

[Ncm

]


torque

[kN

]

FK

[N2/

3 /µm

]

D1

[mm

]

Effi

cien

cy

Maximum backlash of single nuts: 0.03mm for RVR 8 to RVR 40 and 0.04mm for RVR 50 to RVR 125 (can be less on request).If possible, provide a lubrication hole in the nut (contact Rollvis for feasibility and position).

Type RVR - Ground screws - System with rollers’ recycling





RVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVRRVR

0.660.770.840.880.740.820.870.710.800.860.770.770.840.610.740.820.700.800.650.770.610.740.560.700.760.800.660.730.770.610.690.740.650.700.740.70

8 x 0.258 x 0.58 X 18 X 2

10 x 0.510 X 110 X 2

12 x 0.512 X 112 X 2

16 x 0.516 X 116 X 2

20 X 0.520 X 120 X 225 X 125 X 232 X 132 X 240 X 140 X 250 X 150 X 250 X 350 X 463 X 263 X 363 X 480 X 280 X 380 X 4100 X 3100 X 4100 X 5125 x 5

7.807.807.637.639.639.639.6311.9811.6311.6315.6616.0016.0019.3619.6319.6325.0025.0032.0032.0039.6339.6349.6349.6349.4549.2662.2662.0062.2679.2679.0078.5298.8998.5298.15123.15

8.008.008.008.0010.0010.0010.0012.0012.0012.0016.0316.3716.3719.5520.0020.0025.3725.3732.3732.3740.0040.0050.0050.0050.0050.0063.0063.0063.0080.0080.0080.00100.00100.00100.00125.00

7.697.587.197.199.419.199.1911.5811.1911.1915.2215.5615.5619.1419.1919.1924.5624.5631.5631.5639.1939.1949.1949.1948.7948.3861.3860.6861.3878.3877.6876.7697.5796.7695.95120.95

7.96.45.15.17.15.65.66.66.36.37.37.07.0

15.711.111.119.219.241.041.052.652.6102.0101.989.983.4124.6107.2124.6

-------

6.16.46.06.07.57.27.26.88.78.710.910.510.518.918.118.135.035.060.760.690.390.3163.0163.0165.6167.0243.1235.1243.0

-------

30.221.014.714.722.515.815.820.417.217.218.818.718.735.925.925.933.833.842.242.249.349.363.863.851.544.850.140.050.1

-------

1919202022222224242429292934343442425353707082828282105105105138138138170170170220

4242434343434346464653535356565667678383104104124124124124148148148195195195230230230260

3131313131313131313131313137373744445555666680808080110110110175175175180180195262

4141414141414141414141414147474754546767808094949494124124124189189189196196215282

19.819.820.820.822.822.822.825.325.325.332.732.732.735.735.735.743.743.755.255.272.772.784.784.784.784.7105.2105.2105.2141.7141.7141.7173.7173.7173.7223

1010121212121210101014141414141414142020282828282828404040505050565656100

2222222333444444445566666688810101012121212

12501000730460120088057013001000670127012508901800147010801870144026002080309025503320282024602180319028402540

-------

666688810101015151520202030305050707090909090120120120

-------

12.510.28.08.011.38.98.910.510.110.111.711.111.124.817.617.630.430.465.165.183.583.5161.8161.8142.7132.4197.8170.2197.8360.7320.7360.9492.0447.7485.6856

12.112.812.112.115.114.414.413.617.417.321.721.021.037.936.136.170.070.0121.3121.3180.7180.7326.1326.1331.1333.9486.2470.1486.1835.6844.2834.41276125814313102

47.933.323.323.335.725.025.032.327.427.429.929.629.657.041.241.253.653.667.067.078.378.3101.3101.381.871.079.563.579.5121.098.2121.0101.187.186.1126.2

111211211211211212121212221121121111

- 30 -

Applications

The great flexibility of Rollvis SA means it can make all types of screws and nuts as shown in the examples below:

RV 26 x 4,5

RV 8 x 2

RV 15 x 10

RV 30 x 2

- 31 -

RVR 17 x 2

RV 40 x 5

RV 14 x 2

RV 20 x 8,5

- 32 -

Applications (ctd.)

RV 17 x 9

RV 45 x 9

RVR 32 x 1

Quality assurance

ROLLVIS SA is certifiedISO 9001/2000and ASD-EASE

according to EN9100

ROLLVIS SA136, ch. du Pont-du-CentenaireCH-1228 Plan-les-OuatesGENEVA - SWITZERLANDCorrespondence: CP 590CH - 1212 Grand-Lancy 1GENEVA - SWITZERLANDPhone: +41 (0)22 706 90 40Fax: +41 (0)22 706 90 49E-mail: [email protected]: www.rollvis.com

Your nearest agent

rollvis roller screws english

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