INTRODUCTION

Features

Complete Freewheels FKh with hydrodynamic sprag lift-off are typically used in cases where an assembly can be driven from two or more motors or turbines at the same or similar high speed.

Complete Freewheels FKh are sealed sprag freewheels with ball bearings. They are supplied oil-filled and ready for installation.

The freewheels FKh are used as:

➧ Overrunning Clutches

if the speeds in freewheeling operation and in driving operation are the same or similarly high.Nominal torques up to 14 000 Nm.Bores up to 95 mm.
 

Application example

Two Complete Freewheels FKh 28 ATR as over-running clutches in the drive system of a fan.The fan can be driven either by an electric motor or by a turbine. The freewheels between the fan and the two drive assemblies automa-tically engage the working drive with the fan and in each case disengage the drive that is no longer giving power. The freewheels replace actuated clutches, which require an additional activation when changing over from one drive to another. The hydrodynamic sprag lift-off is the most suitable type for a wear-free freewhee-ling operation if the speeds in driving operation are the same or similarly high to those speeds in freewheeling operation.
 

The maximum transmissible torque is 2 times the specified nominal torque. See page 14 for determination of selection torque.

Keyway according to DIN 6885, page 1 • Tolerance of keyway width JS10.

* Keyway according to DIN 6885, page 3 • Tolerance of keyway width JS10.

** Z = Number of tapped holes G on pitch circle T.