Installation and Operation Instruction
For Housing Freewheels FHD 1000 to FHD 18000
E 08.794e
Issue: 21.12.2021
Version : 03
drawn: KISR
checked: HEUT pages: 14
page: 4
1. General introduction
Housing Freewheels FHD
are machine elements with particular characteristics:
•
In one direction of rotation there is no contact between the inner and outer ring; the freewheel
is in freewheeling operation.
•
In the other direction of rotation there is contact between the inner and outer ring; in this direc-
tion it is possible to transmit high torque.
Housing Freewheels FHD
are used as:
•
Overrunning Clutches
Caution!
Freewheels can be used as safety components, it is important to observe these
installation and operating instructions carefully.
2. Applications of Freewheels
Application as Overrunning Clutch
The overrunning clutch engages machines or machine parts and automatically interrupts that
contact as soon as the driven part of the overrunning clutch is turned faster than the driving part.
In many cases, this can replace a more expensive externally actuated clutch.
With overrunning clutches the engagement take place in the driving operation (torque transmis-
sion), while in freewheeling operation the torque transmission between the inner and outer ring is
interrupted. In driving operation the speeds of the inner and outer ring are equal, while in free-
wheeling operation they are different.
