Plastoform screws are used in polymer components. These screws form a permanent thread when
they are installed for the first time. They can be removed and installed as often as necessary without
detrimentally affecting the strength of the screwed assembly, providing the specified tightening torque
is observed.
For this reason always use a torque wrench.
Fastener Thread For component Torque Remarks
size Nm lbf.ft
Self-tapping screw IS-B6.3x32 LH hand guard/motor housing 4.5 3.3
Slotted nut M5 L Drive pinion/rotor shaft 8.0 5.9 1)
Plastoform screw IS-P3x10 Cover plate/sprocket cover 1.0 0.75
Plastoform screw IS-P4.5x25 Commutator cover/motor housing 3.0 2.2
Plastoform screw IS-P4.5x45 Stator/motor housing (1200 W) 3.0 3.0
Plastoform screw IS-P4.5x55 Stator/motor housing (1400, 1600 W) 3.0 3.0
Plastoform screw IS-P4x19 Oil pump/gear housing 2.5 1.8
Plastoform screw IS-P4x19 Handle housing/motor housing 2.0 1.5
Plastoform screw IS-P4x19 Cable clamp/motor housing 1.5 1.1
Plastoform screw IS-P5x20 Spiked bumper/handle housing 4.0 3.0
Plastoform screw IS-P5x20 Gear housing/motor housing 3.0 2.2
Spline screw IS-M6x25 Brake band/gear housing 6.0 4.4
Use the following procedure to fit a ’P’ screw in an existing thread:
–PlacethePscrewintheholeandrotateitcounterclockwiseuntilitdropsdownslightly.
–Tightenthescrewclockwisetothespecifiedtorque.
This procedure ensures that the screw engages properly in the existing thread and does not form a new thread.
1) Secure slotted nut with Loctite 242.
Note: Screws/nuts secured with adhesive are easier to release if they are heated beforehand with a hot air blo-
wer (hairdryer).
Be careful with polymer components!
Power screwdriver speed settings for polymer: Plastoform screws max. 600 rpm,
DG screws max. 500 rpm
2.4 Tightening Torques
4
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