ripp lock washers
DESCRIPTION
RIPP LOCK Washers prevent fasteners from loosening in conditions of extreme vibration or dynamic stress. Due to their high hardness, they can be used with screws of all property classes up to 12.9.TRANSCRIPT
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Efficient and secure
8210/10.02
RIPP LOCK lock washerFor lo
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2RIPP LOCK lock washers
RIPP LOCK lock washers ribbed on both sides
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3The systemRIPP LOCK lock washers have radial ribs on both sides. The pitch angle of the ribs is larger than the thread pitch.
When the screw or nut is assembled, the radial ribs of RIPP LOCK lock washers form-closedly emboss in the counter-surface and in the underside of the screw head. Therefore, there can only be relative movement in the separation gap between screw head and washer. RIPP LOCK is a reliable screw lock even under extreme vibration or dynamic stress. Due to their high hardness, the washers can be used with screws of all propertyclasses up to 12.9.
The following must applyfor locking: >
Prior to assembly
After assembly
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4RIPP LOCK lock washers
Benefits
Excellent locking against self-unscrewing even under high dynamic stress
0
5000
10000
15000
20000
25000
30000
0 50 100 150 200 250 300 350
load change
RIPP LOCK
lock washers Ssafety washerDIN 127 (spring washer)
Junkers vibrationtest according toDIN 651151
Screw M10 (8.8) galvanically zinccoated
Gentle to contact surface even to coated or powder coated surfaces
Perfectly suitable also for slotted-hole applications
RIPP LOCK
Aluminium
DIN 127For lo
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5Benefits
Very low fluctuation in preload-force at defined tightening torque
Universal use outside diameter = DIN 125 / ISO 7089
100%tightening torque
with RIPP LOCK
without RIPP LOCK
tightening torque
pre
load
-for
ce
50% lower-head friction
30% thread friction
10% other losses
10% preload-force
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6Possible applications
RIPP LOCK lock washers
RIPP LOCK shall not be used on loose plain washers
RIPP LOCK screw fastening in tapped holes
Through screw joints with two RIPP LOCK washers
With RIPP LOCK, adhesion of studs is not required anymore
Further benefits Easy assembly and removal multiple reuse
Economic benefits due to reduction and standardisation of assortment
Small space requirements
Not affected by contact with lubricants or greases
Perfectly suitable for low-strength metals (aluminium, copper, aluminium and magnesium casting alloys, etc.)
Suitable for all property classes up to 12.9
Particularly suitable for sensitive surfaces such as zinc coated, chromium-plated, coated or powder coated surfaces
Immediate effect no curing
Same temperature range as used screws
Longevity no ageing, no embrittling or weathering
Almost no mechanical abrasion no chip formation
Retrofitting into almost every construction
Effective in adjustable fastenings of components (e. g. prestressing of belt drive)
Very small relaxation
CAD data available on request
The RIPP LOCK defines friction values of most diverse materials and surfaces
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7RIPP LOCK lock washers
Tightening torques
Technical information
B
d2
d1
A
s
A0,36
A A
To minimise creep and relaxation, screws with a large head support are used in many applications. However, particularly for light metals, friction values often are so high that the desired preload-forces are not achieved (seered lines in diagram). With the use of RIPP LOCK lock washers which only allow a relative movement betweenscrew head and washer, defined friction values and thus defined clamping forces are always achieved even formost diverse materials and surfaces (see blue lines in diagram).
Tightening torques determined in accordance with VDI guideline 2230 (Association of German Engineers VDI) can thus be applied to almost all other applications.
Tested on aluminium
All RIPP LOCK lock washers comply with ELV, RoHS and WEEE directives and are thus chrome(VI)-free.
Size(nominal
dimension)
68
101216
Order No
53065STZL653065STZL853065STZL1053065STZL1253065STZL16
Diameter of holed2
min.
6.48.4
10.512.516.5
Outside diameterd1
max.
1216202430
Thicknesss
nominal dimension
2.02.52.53.04.0
Bmax.
8.0010.0012.1014.1018.10
Material steelHardness 350500 HV
Surface zinc flake480 h
0
20
40
60
80
100
0 10 20 30 40
preload force in kN
tight
enin
g to
rque
in N
m
EN 1665 10.9flange screw
DIN 931 10.9with RIPP LOCK
VDI guideline 2230
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Subject to technical change.Reprinting, even in extract form, only permitted with express consent.Observe protective note according to DIN 34.
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