disc coupling - reijay.com · disc coupling 1. no need for lubrication and coupling maintenance 2....

Transmission Engineering . Hydraulic-Components . Oil-coolers

Tel: +0086-21-5888 3649 Shanghai Reijay Email: [email protected] www.reijay.com

1

Disc Coupling

1. No need for lubrication and coupling maintenance

2. No wearing parts

3. The condition of the disc packs can be inspected by a strobe light while the machine runs

4. High torsional rigidity with no rotation

5. High power density (higher torque for a given outside diameter)

6. Resistance to harsh environment



2

Technical data for the diaphragm

Style Rated

torque (Nm)

Peak torque

(Nm)

Torsional

stiffness×106

(Nm/rad)

Permissible axial

misalignment (±Δka mm)

Permissible

angular misalignment

（°）

90-6 240 480 0.3 1.5 1.5°

110-6 575 150 0.4 2.1 1.5°

132-6 1100 2200 0.5 2.6 1.5°

158-6 2000 4000 0.7 3.1 1.5°

185-6 3300 6600 1.3 3.7 1.5°

202-6 4600 9200 1.5 3.8 1°

228-6 7000 14000 2.6 4.2 1°

255-6 10200 20400 4.7 4.7 1°

278-6 14200 28400 7.1 5.2 1°

302-6 20000 40000 9.5 5.7 1°

325-6 25000 50000 13 6.5 1°

345-6 31000 62000 17 6.9 1°

380-6 42300 84600 22 7.6 1°

410-6 57100 114200 28 8.2 1°

440-6 73500 147000 35 8.8 1°

278-8 20000 40000 9.5 3.7 0.5°

302-8 30000 60000 14.9 4 0.5°

325-8 37000 74000 20.4 4.3 0.5°

345-8 46000 92000 25 4.6 0.5°

380-8 63000 126000 34 5 0.5°

410-8 86000 172000 40 5.4 0.5°

440-8 110000 220000 49 5.8 0.5°

Standard structure

Structure

Configuration

SU

1. Composed of a pair of flexible diaphragmand two shaft

sleeves.

2. For compensation to the angular and axial misalignment

only

3. Two SU couplings are often combined with a shaft to

make a floating shaft coupling, and the shaft can be



3

hollowed for light weight use

Configuration

SX

1. Two flexible diaphragm accommodates the parallel,

angular, and axial misalignment

2. It is available in 4, 6 and bolts design, and the bore sizes

are up to 13 inches (330mm)

3. Custom spacer lengths and overload bushing are available

Configuration

SXCST

1. The split spacer couplings, where disc packs can be

serviced or removed without moving hubs

2. Connection boots are installed from inside the spacer

outward, pointing towards the hubs

Other structure according to clients request

Configuration DI 1. “Drop-in” spacer assembly coupling; two hubs and a

spacer assembly

2. Hubs are piloted ensures proper centering, as an anti-fail

feature

3. Meets the API-610 balance and anti-fail requirements

4. Over sized hubs available, and allows for the use of

smaller coupling where applicable

Configuration

SXC

1. Close coupled variation of the SX type coupling

2. Used with one or both hubs turned outward for different

shaft separations

Configuration

SXCS

1. Split spacer couplings, where disc packs can be serviced

or removed without moving hubs

2. SXCS type connection bolts are installed from the end

of the hubs inward, pointing towards the spacer

Configuration

SX6C-composite

disc coupling

1. Lightweight composite material ensures strength and

endurance

2. Stainless steel hubs protect against aggressive

environments

3. Theoretical infinite fatigue life

Model selection steps

1. Select the coupling type

2. Select the driven machine service factor SFA from table 1 and for the driving machine SFD from table 2. The

summation of the service factors SFA and SFD are SF.



4

3. Calculate the selection torque by the formula:

TKNerf(Nm): minimum required selection torque

PAN(KW): nominal input power at operation speed

nAn(1/min): operating speed

4. The coupling selected must have an equal or greater rated torque capability than the selection torque calculated in

step 3. Check the peak or starting torque capability of the selected coupling. For system where frequently utilized the

peak torque of the power source, verify that magnitude of the peak torque does not exceed the rated nominal torque of

the selected coupling.

The nominal torque mentioned in the catalogs refer to a hub with cylindrical bore and key-way. For other shaft hub

joint, please contact us.

5. Check the maximum hub bores, speed, so as to ensure if it could transmit required torque.

6. Check if the axial, angular and radial misalignment meets the permissible value in this book. The permissible vale

of the axial misalignment and torque are obtained by the angular misalignment of figure 1 and figure 2.

It is suggested to make the misalignment within 20% of the permissible misalignment.



5

angular and radial misalignment axial misalignment

Driven machine service factor SFA

Blowers, fans 1.0 Frequency converters 1.5 Rolling mills

Centrifugal 1.25 Welding generators 2.0 Billet shears

Turbo blowers 1.5 Machine tools Gold rolling mills 2.0

Forced draught fans 1.5 Main drives 2.0 Continuous casting plants 2.5

Induc. Draught 2.0 Auxiliary and transverse drives 1.5 Cooling beds 1.5

Induc. Draught without control

2.0

Metal work Cropping shears 2.0

Cooling towers 2.0 Presses/Hammers 2.0 Chain transfers 1.5

Chemical industry Straighteners 2.0 Descaling machines 2.0

Agitators (thin liquid) 1.0 Bending machines/shears 1.5 Heavy and medium duty mills 3.0

Agitators (viscous liquid) 1.5 Punching machines 2.0 Ingot and blooming mills 2.5

Centrifuges (light) 1.25 Marine applications 2.5 Ingot handling machinery 2.5

Centrifuges (heavy) 1.75 Mining and stones Intot pusher 2.5

Mixers 1.75 Crushers, mills 2.5 Manipulators 2.0

compressors Mine ventilators 2.0 Plate shears 2.0

Centrifugal 1.0 Vibrators 1.5 Roller adjustment drives 1.5

Lobe/rotary 1.5 Oil industry Roller straighteners 1.5

Turbo compressors Pipeline pumps 1.5 Roller tables(heavy) 2.5

Reciprocating air compressor Rotary drilling equipment 2.0 Roller tables(light) 1.5

1 to 3 cylinders 3.0 Paper industry Sheet mills 2.5

4 or more cylinders 1.75 Calendars 2.0 Trimming shears 1.5

Conveyor, hoists, elevators Wet presses 2.0 Tube and welding machines 2.0

conveyors Drying cylinders 2.25 Winding machines 1.5

Screw/apron/belt/chain 1.25 Pulpers 2.0 Wire drawing benches 1.5

Bucket/rotary/lifts 1.5 Pulp grinders 2.0 Rubber industry

Reciprocating 3.0 Suction rolls 2.0 Extruder 1.75

hoists Presses 2.0 Calendar 2.0

Medium duty 2.5 Reels, agitators 2.0 Mixing mill/refiner/crusher 2.5

Heavy duty 3.0 Food industry Steel plants

Elevators: centrifugal and

gravity disch 1.25

Calendars, crushers, mixers 1.75 Blast furnace blowers 1.5

Dredgers 2.0 pumps Converters 2.5



6

Food industry Centrifugal, general feed or boiler

feed 1.0

Inclined blast furnace elevators

2.0

Packing machines and fillers

1.25

Centrifugal, slurry 1.5 Crushers 2.0

Kneading machines 1.5 Centrifugal, dredge 2.0 Steel plants

Cane crushers, cane cutters 1.5 Rotary/gear/lobe or vane 1.5 Printing and drying machines 1.5

Can mills 2.0 Reciprocating pumps Tanning vats, calenders, looms 1.5

Sugar beet washing machines

1.5

1 cylinder 3.0 Water and waste industry

Sugar beet cutters 1.5 2 cylinders, single acting 2.0 Aerators, screw pumps, screens

1.5

generators 2 cylinders, double acting 1.75 Wood working machinery

Even 1.0 3 cylinders or more 1.5 Trimmers, barkers, saws, planes

1.5

Fig.2 Service factor for driving equipment

Driven machine service factor SFD table 2

Driving equipment SFD 6 1.0 Variable speed motors 0.8

Multi-cylinder engine 4 or 5 1.5 Electric motors and turbines 0

8 or more 0.5 Less than 4 ( refer to us)

SU type

diaphragm

Sleeve Hub



7

Size

Rated

torque

Peak

torque

Maximum rotation

rate

Weight④Moment of

inertia⑤

Permissible

peak axial

disalignment⑥

Permissible

peak

angular

disalignmen

t⑦⑧⑨

d1/d2

maximum

diameter of

hole③

L P L1/L2 A BWithout

dynamic

balance①

with

dynamic

balance②

Nm Tkmax

Nm l/min l/min Kg Kg*m2 mm （°） mm mm mm mm mm mm

90-6 240 480 9100 22700 1.4 0.001 0.75 1.5° 38 88 7.5 40 90 58

110-6 575 150 7200 18000 2.3 0.001 1 1.5° 46 108 8.4 50 110 65

132-6 1100 2200 5840 14600 3.8 0.001 1.3 1.5° 60 128 8.4 60 132 84

158-6 2000 4000 4920 12300 6.4 0.001 1.5 1.5° 70 151 11.2 70 158 98

185-6 3300 6600 4200 10500 9.9 0.001 1.8 1.5° 80 174 14 80 185 112

202-6 4600 9200 3840 9600 13.5 0.001 1.9 1° 90 196 15.5 90 202 125

228-6 7000 14000 3400 8500 19 0.001 2.1 1° 100 218 17.5 100 228 140

255-6 10200 20400 3080 7700 29 0.001 2.3 1° 110 251 20.5 115 255 155

278-6 14200 28400 2800 7000 37 0.001 2.6 1° 124 271 21.2 125 278 174

302-6 20000 40000 2560 6400 49 0.001 2.8 1° 135 294 24.4 135 302 190

325-6 25000 50000 2400 6000 60.5 0.001 3.2 1° 145 316 26 145 325 205

345-6 31000 62000 2200 5500 73 0.001 3.4 1° 155 338 28.2 155 345 217

380-6 42300 84600 2040 5100 96 0.001 3.8 1° 170 372 32 170 380 238

410-6 57100 114200 1880 4700 124 0.001 4.1 1° 180 403 33.2 185 410 255

440-6 73500 147000 1740 4350 151 0.001 4.4 1° 195 426 36.4 195 440 273

1. Balanced as manufactured; meet the requirements in line with AGMA 9000-C90, class 9.

2. Balanced, meets the requirements according to AGMA 9000-C90 class 10.

3. The maximum bores shown are for cylindrical or taper shafts with keys. For splines and other bore types, please

contact our technical support.

4. The weight is given for a complete coupling with maximum bores.

5. The moment of inertia is given for a complete coupling with maximum bores.

6. The axial misalignment is provided for coupling with one disc pack

7. The angular misalignment is provided per single disc pack.

8. There is no parallel misalignment for SU type.



8

SX-6 type

Specification

Size

Normina

l torque

Rated

torque

Maximum rotation

rate

weight④Moment of

intertia⑤

Permissible

Axial

Misaligment

⑥

Permissible

Axial

Misaligmen

t ⑦⑧

Max.Bore

③ L Z P L1/L2 S⑨ A BWithout

dynamic

balance①

with

dynamic

balance②

Nm Tkmax

Nm l/min l/min Kg Kg*m2 mm （°） mm mm mm mm mm mm mm mm

90-6 240 480 9100 22700 2.1 0.002 1.5 1.5° 38 134 45 7.5 40 60 90 58

110-6 575 150 7200 18000 2.1 0.004 2.1 1.5° 46 189 72 8.4 50 89 110 65

132-6 1100 2200 5840 14600 2.1 0.012 2.6 1.5° 60 228 91 8.4 60 108 132 84

158-6 2000 4000 4920 12300 2.1 0.025 3.1 1.5° 70 264 102 11.2 70 124 158 98

185-6 3300 6600 4200 10500 2.1 0.063 3.7 1.5° 80 300 112 14 80 140 185 112

202-6 4600 9200 3840 9600 2.1 0.11 3.8 1° 90 339 128 15.5 90 159 202 125

228-6 7000 14000 3400 8500 2.1 0.2 4.2 1° 100 375 140 17.5 100 175 228 140

255-6 10200 20400 3080 7700 2.1 0.32 4.7 1° 110 427 156 20.5 115 197 255 155

278-6 14200 28400 2800 7000 2.1 0.56 5.2 1° 124 469 177 21.2 125 219 278 174

302-6 20000 40000 2560 6400 2.1 0.86 5.7 1° 135 505 186 24.4 135 235 302 190

325-6 25000 50000 2400 6000 2.1 1.17 6.5 1° 145 544 202 26 145 254 325 205

345-6 31000 62000 2200 5500 2.1 1.63 6.9 1° 155 580 214 28.2 155 270 345 217

380-6 42300 84600 2040 5100 2.1 2.64 7.6 1° 170 637 233 32 170 297 380 238

410-6 57100 114200 1880 4700 2.1 4.04 8.2 1° 180 690 254 33.2 185 321 410 255

440-6 73500 147000 1740 4350 2.1 5.45 8.8 1° 195 725 262 36.4 195 335 440 273

Intermediates Diaphragm

Sleeve



9

1. Balanced as manufactured; meet the requirements in line with AGMA 9000-C90 class 9.

2. Balanced, meet the requirements according to AGMA class 10.

3. The maximum bores shown are for cylindrical or taper shafts with keys. For splines and other bore types, please




6. The axial misalignment is provided for coupling with one disc pack.


SX-8 type

Intermediates Diaphragm

Sleeve Hub



10

Size

Rated

torque

Peak

Torque

Maximum rotation

rate

weigh

t④

Moment of

intertia⑤

Permissibl

e Axial

Misaligme

nt⑥

Permiss

ible

Axial

Misalig

ment

⑦⑧

Max.Bore

③ L Z P L1/L2 S⑨ A B

Without

dynami

c

balance

①

With

dynamic

balance②

Nm Tkmax

Nm l/min l/min Kg Kg*m2 mm （°） mm mm mm mm mm mm mm mm

278-8 20000 40000 2800 7000 59 0.573 3.7 0.5° 124 469 177 21.2 125 219 278 174

302-8 30000 60000 2560 6400 77 0.878 4 0.5° 135 505 186 24.4 135 235 302 190

325-8 37000 74000 2400 6000 92 1.199 4.3 0.5° 145 544 202 26 145 254 325 205

345-8 46000 92000 2200 5500 112 1.66 4.6 0.5° 155 580 214 28.2 155 270 345 217

380-8 63000 126000 2040 5100 150 2.715 5 0.5° 170 637 233 32 170 297 380 238

410-8 86000 172000 1880 4700 195 4.11 5.4 0.5° 180 690 254 33.2 185 321 410 255

440-8 110000 220000 1740 4350 230 5.54 5.8 0.5° 195 725 262 36.4 195 335 440 273

SXCST-6 type

Intermediates

axial direction

Sleeve Diaphragm

Sleeve Hub



11

Specification

Size

Rated

torqu

e

Peak

Torque

Max Speed

weight④

Mom

ent of

intert

ia⑤

Permissibl

e Axial

Misaligme

nt⑥

Permissible

Axial

Misaligme

nt ⑦⑧

Max.

Bore

③

L LF P Z L1/L

2 S⑨ M A B F

Without

dynami

c

balance

①

with

dynami

c

balance

②

Nm Tkmax

Nm l/min l/min Kg

Kg*m

2 mm （°） mm mm mm mm mm mm mm mm mm mm mm

90-6 240 480 9100 22700 3.1 0.003 1.5 1.5° 31 99.6 91.4 7.5 46.5 40 11.6 45 89.9 42.4 94

110-6 575 150 7200 18000 5.9 0.009 2.1 1.5° 39 128.5 117.3 8.4 57.5 50 17.2 45 110 54.1 121.2

132-6 1100 2200 5840 14600 9.4 0.019 2.6 1.5° 50 140.7 129.7 8.4 69.9 60 9.7 45 132.1 70.9 138.9

158-6 2000 4000 4920 12300 16.3 0.047 3.1 1.5° 60 167 152.9 11.2 76.7 70 12.7 55 158 84.1 165.1

185-6 3300 6600 4200 10500 25.5 0.101 3.7 1.5° 68 207.2 191.2 14 98.5 80 31.2 65 184.9 95 193

202-6 4600 9200 3840 9600 35 0.165 3.8 1° 75 222.5 204.7 15.5 101.9 90 25.4 75 201.9 108 210.1

228-6 7000 14000 3400 8500 52.7 0.324 4.2 1° 85 255.6 235.7 17.5 118.9 100 35.6 85 228.1 122.9 236

255-6 10200 20400 3080 7700 77.7 0.605 4.7 1° 95 312.2 286.3 20.5 141.5 115 56.6 100 255 134.6 262.9

278-6 14200 28400 2800 7000 95.9 0.864 5.2 1° 105 312.7 286.8 21.2 140.5 125 37.3 105 278.1 152.1 286

302-6 20000 40000 2560 6400 127.5 1.38 5.7 1° 115 353.8 325.6 24.4 162.6 135 55.6 115 301.8 164.8 309.9

325-6 25000 50000 2400 6000 138.3 1.612 6.5 1° 125 346 318 26 222 145 28 115 325 14 333

345-6 31000 62000 2200 5500 168.7 2.231 6.9 1° 130 370 340 28.2 235.6 155 30 125 345 186 345

380-6 42300 84600 2040 5100 232.4 3.801 7.6 1° 145 408 374 32 256 170 34 140 380 204 390

410-6 57100 114200 1880 4700 297.9 5.709 8.2 1° 160 443 405 33.2 278.6 185 35 150 410 232 410

440-6 73500 147000 1740 4350 355.4 7.761 8.8 1° 165 470 428 36.4 289.2 195 38 165 440 233 440

1. Balanced as manufactured; meet the requirements in line with AGMA 9000-C90 class 9.

2. Balanced, meet the requirements according to AGMA 9000-C90 class 10.

3. The maximum bores shown are for cylindrical or taper shafts with keys. For splines and other bores, please




6. The axial misalignment is provided for coupling with one disc pack.




12

SXFA flange type SX with SLD shaft locking device type

SXV type for vertical mounting DIEI electrical insulation type

DISP with safety pin type SXLEF type for axial shift limited



13

R-VQG Disc coupling standard

Technical data

Size Rated

torque

Peak

Torque

Max

Speed

Moment of

intertia

Permissible

Axial

Misaligment⑥

Permissible Axial

Misaligment ⑦⑧

Max.

BoreL P Z L1/L2 S M A B

R-VQG Nm Tkmax

Nm min-1 Kg*m2 Δka（mm） Δkw（°） mm mm mm mm mm mm mm mm mm

53-6 55 100 10000 0.184

0.8 2 20 79

6.9 16.2

24.5 30

M5x24.5 53 30 0.312 90 25.2 39

72-6 125 225 8400

0.786

1 2 30

109

7.2

15.6

39.5

30

M5x24.5 72 42 1.518 139 45.6 60

1.915 179 85.6 100

2.313 219 125.6 140

89-6 250 450 6800

3.01

1.2 2 40

127

8.5

20

45

37

M6x31.5 89 55

5.542 160 53 70

5.785 170 63 80

6.273 190 83 100

7.248 230 123 140

118-6 570 1000 5400

12.577

1.6 2 55

156

10.1

25.8

55

46

M8x40 118 76 20.043 210 79.8 100

23.008 250 119.8 140



14

25.973 290 159.8 180

142-6 1075 1900 4600

29.206

2 2 65

175

11.7

31.6

60

55

M10x47 142 90 46.664 220 76.6 100

53.041 260 116.6 140

59.419 300 156.6 180

168-6 1900 3400 3800

107.564

2.4 2 80

250

12.7

74.6

75

100

M12x55 168 110120.418 290 114.6 140

133.271 330 154.6 180

200-6 2800 5000 3400

163.536

2.8 2 100

251

14.6

41.8

90

71

M14x64 200 132262.721 320 110.8 140

287.783 360 150.8 180

238-6 5500 9900 3000

483

4 2 115

251

20.8

51.4

125

93

M16x80 238 162621.69 320 98.4 140

675.22 360 138.4 180

Other structure for R-VQG Disc coupling



15

客户名称(Client Name)：_____________ 联系人(Contact)：___________________

电话(Tel)： _______________________ 邮箱(Email)：___________________

1.驱动类型（电机、内燃机、减速机等）：_______________________________________

Driver Type ( Motor, internal combustion engine,reducer etc...)

内燃机类型( Type of internal combustion engine)

汽油(gasoline)、柴油(diesel)、天然气等(natural gas)：_________

汽缸数(Number of cylinders )__________________

2. 驱动功率(driving power)：_______________

3. 驱动转速或减速机输出转速(Driving speed or reducer’s output speed)：_____________

应用使用系数（application usage coefficient)：____________________

选型扭矩(selected torque)= kw * 9550*使用系数（use-coefficient）= Nm

RPM

4.驱动轴轴径(Actuating shaft diameter)：_________

键槽尺寸(Keyway size) 宽(width)_________ 高(height)_________

要求: 间隙配合，过盈配合，涨套锁紧装置，固定螺丝 (Requirement: clearance fit, interference fit, locking

assemblies equipment,set screws)



16

5..驱动轴有效长度(Actuating shaft effective length)：_________（从轴端至轴的台阶 From axle head to axis

sidesteps)

6.轴间距（BSE）(Distance between axles)：_____________________________

7.从动设备类型(Driven equipment type)：___________________________

8.从动轴轴径和键槽尺寸(Driven shaft diameter and keyway dimension) ：

宽(width)________ 高(height)________

要求：间隙配合，过盈配合，涨套锁紧装置，固定螺丝

Requirement: (clearance fit, interference fit, locking assemblies equipment,set screws)

9.从动轴有效长度(Driven shaft effective length):___________________ （从轴端至轴的台阶 From axle head to

axis sidesteps）

10.总安装长度(Total installation length)：___________________（告知所有障碍物、墙、梁、防护罩、管路等 All

obstacles include walls,bridges, protective covers, pipelines etc should be informed.）

11.锥轴信息(cone axis info)：

最小或最大的锥轴直径(Minium or maximal Cone shaft diameter)：

锥轴长度( Cone axis length)：_______________ T（锥度 Taper）：________________

间隙或轴套悬臂量(Clearance or axle sleeve cantilever length)：_____________________

锁紧螺母宽度( Locknut width):________ 锁紧螺母规格(Locknut specification)：_______

螺纹规格(Thread specification)：________ 螺纹长度(Thread length)：__________

弹簧垫圈直径（如使用）( Spring washer diameter ( if applicable))： ____________

弹簧垫圈宽度(Spring washer width)：______________________

disc coupling - reijay.com · disc coupling 1. no need for lubrication and coupling maintenance 2....

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