Introduction
FRS, FRZ and FRSG models are general purpose ball
bearing freewheels suitable for overrunning,
backstopping and light duty indexing applications.
Ringspann FR_ Series freewheels mount on a
through-shaft with the inner race driven by a key.
The O.D. of the outer ring is designed as a mounting
surface or pilot for attaching the driven member.
The O.D. of the outer ring is ground concentric with
the bore to provide proper alignment and installation.
Failure to follow these instructions
may result in product damage, equipment damage,
and serious or fatal injury to personnel.
Pre-installation Check
Before installing, check:
1.
Shaft to Bore fit:
Freewheel Bore
Shaft Fit Guide
0 to 2 inches dia.
Line fit to .002 inches loose
2 to 4 inches dia.
Line fit to .0025 inches loose
4 to 7 inches dia.
Line fit to .003 inches loose
Note:
Machine builders may use non-standard shaft fits
to mount Ringspann freewheels. In this event, direct any
questions concerning shaft fit to the machine builder.
2.
Key and keyseat
Hardness:
Use a hardened key, from 30 to 40
Rockwell “C” scale. Use materials AISI 1141, 1045
or 4130
Overrunning & Backstopping
Fit:
Break edges of the key before installing, to
prevent any bearing at these points. Install with a
push fit. Be sure the key seats squarely. Do not use
force fit.
Length:
The key must be equal to the length of the
inner ring for proper engagement.
Indexing
Fit:
Fit the key up to .001 inch interference on Width
dimension to prevent loosening in indexing service.
Do no exceed .001 inch tight.
3.
Rotation
Determine proper direction of free rotation for
application and orientate the freewheel to match
based on the directional arrows marked freewheel.
Installation
1.
Mount the freewheel and key on the shaft.
Note:
Oil lubricated freewheels may only be used on
applications with mounting orientations within 5
degrees of horizontal. Grease lubricated freewheels
may be used on applications with non-horizontal
orientations.
Apply pressure only to face of freewheel inner ring.
2.
Application of pressure to the outer ring could
damage the bearings. For ease of mounting, it is
permissible for oil lubricated freewheels to be
immersed in hot, clean oil (not exceeding
200°F/93°C) for ten to fifteen minutes prior to
mounting.
3.
Secure the axial position of the freewheel inner ring
onto the shaft. Approved methods of axial retention
include the use of shaft collars, keeper plates,
retention rings, or retention keys.
4.
Mount attaching parts to the freewheel outer ring as
required by the application.
If a torque arm is to be mounted to the freewheel,
allow 1/4 to 1/2 inch clearance between stops and
torque arm.
Tapped mounting holes are provided in each end of
the outer ring. Center the gear, pulley or sheave on
the outer ring. Avoid excessive over-hung loads.
Check with Ringspann Corporation if the freewheel
must support large side loads during overrunning
cycle of operation as damage may occur.
5.
All Ringspann freewheels are lubricated before
leaving the factory. However, check the following
Lubricant table for the proper lubricant and fill level
for each type application and ambient operating
temperature range. Change the lubricant or add oil
to proper level, if required.
6.
Check for proper rotation by spinning the freewheel
by hand.
Lubrication
Proper lubrication and lubricant maintenance are the
most important single maintenance factors for long,
effective, trouble-free operation of freewheels. Read the
following instructions and follow them carefully for
maximum performance and utilization of Ringspann
freewheels.
Always recheck oil level in freewheel after
installation and before start up.
