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Types GFR, GFRN are roller type freewheels. These units are part of the Stieber modular system. They are bearing supported, using two 160.. series bearings, and require oil lubrication. These units may be used in designs providing oil lubrication and sealing as on the example overleaf. The bearings must not be axially stressed. Typically, types GFR, GFRN are used with the F series covers that are designed to transmit torque, and provide oil lubrication and sealing. Usually these covers are used in pairs according to combinations shown on the following pages. The outer race of the GFR model is plain to receive and center any component bored to H7 tolerance. Torque is transmitted by bolts through the cover plate in this case. Types GFR, GFRN are identical except that type GFRN has a keyway on the outside diameter to transmit the torque. Two paper seals are delivered with each unit to be placed between the outer race and cover plates.


1) Tmax = 2 × TKN

2) Inner race overruns.

3) Outer race overruns.  Keyway to DIN 6885.1

Mounting Example

Using Notice

1.Installed Backstop anti-rotation cap can not bear the load pin axis direction,so this needs subject to the installation gap of 3-5 mm,Otherwise it will result backstop temperature rises drastically affect use.

2.Ambient temperature -20 ℃ - + 60 ℃

3.BackStop should be opened after working for a year to clean and inspect parts for wear, if have any defects should be replaced immediately,otherwise refueling along wear and continue using.

4.The grease required temperature range -40 ℃ ~ + 150 ℃.

5.Periodically check anti-rotation bearing mounting bolt fastening.

6.This installation instructions must handed operation to last users.

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