RINGSPANN FRS Series Manual

Bulletin E 8.733
Installation, Lubrication, Maintenance Instructions
Ringspann Freewheel Clutches
FRS 300 thru 1000
FRZ 300 thru 1000
FRSG 300 thru 1000
RINGSPANN Tel: [phone]
CORPORATION Fax: [phone]
10550 Anderson Place Web: www.ringspanncorp.com
Franklin Park, IL 60131 Email: [e-mail]

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.

Oil Lubrication
Use oils selected from the following table according to
the application and ambient temperature existing at the
freewheel.
Note: FRS and FRZ-300 thru 1000 freewheels are
shipped from Ringspann half full of Dexron III Automatic
Transmission Fluid.
For applications where the ambient temperature
exceeds +150°F (+65°C) consult Ringspann.
Do not use lubricants of the EP type
(extreme pressure characteristics) or those
containing slippery additives such as sulfur
phosphate, graphite, or molybdenum disulphide.
Temp. Range Recommended Oil Lubricant
0°F to 150°F MOBIL Multi-Purpose ATF (Dexron III)
TEXACO Havoline ATF (Dexron III)
CHEVRON ATF (Dexron III)
-20°F to 60°F MOBIL DTE-15M
TEXACO Rando-HDZ 46
CHEVRON Hydraulic Oil AW MV 46
-50°F to 32°F MOBIL Aero HF
TEXACO Aircraft Hydraulic Oil 5606G
CHEVRON Aviation Hydraulic Oil A
Important: Do not mix oils. When switching from one
brand or type to another, drain old oil and flush
freewheel with mineral spirits, such as MOBIL
SOLVASOL or equivalent. Do not use any solvent
containing Carbon Tetrachloride.
The use of lubricants in freewheel
assemblies, other than shown, can compromise proper
function that may cause personal injury or property
damage and will automatically void any warranty.
Ringspann is not responsible for any lubrication changes
made after the freewheel leaves our factory.
Oil Lubrication Maintenance
1. Inspect the oil level once a month or every 160
hours of operation, whichever occurs first. Indexing
applications that operate in excess of 150 strokes
per minute and severe duty applications may require
more frequent oil level inspection.
2. Add oil if necessary to maintain the proper level.
Overrunning, Backstopping....... 1/2 full
Indexing.................................... 7/8 full
3. To assure continued efficiency of operation, flush
freewheel every 6 months with mineral spirits.
Do not use any solvent containing Carbon
Tetrachloride as seal damage may occur.
Important: Under severe operating conditions, such
as heavy dust or twenty-four hours per day
operation, flushing may be required at shorter
intervals.
Flushing will remove waxes and gums formed by
vaporization of the oil and helps assure continued
efficiency of operation. See “Flushing Procedure”.
4. Flush with mineral spirits and relubricate before use
if freewheel has been out of service or in storage for
six months or more. Use recommended oils only.
In cases of dirty or abrasive environment or severe
operating conditions (24 hours per day), it is
recommended that oil be changed every month.
5. If the freewheel is out of service or in storage for two
years or more, new seals should be installed before
freewheel is put into service.
Oil Lubrication – Filling Procedure
Overrunning and Backstopping Applications
1. Rotate freewheel outer ring as shown in Figure A.
2. Remove (A) and (B) plugs and add oil through (A)
until oil flows from (B). The freewheel is now 1/2 full.
3. Reinstall (A) and (B) plugs with sealing washers and
tighten to prevent leakage.
Indexing Applications (up to 150 strokes per minute)
Note: Contact Ringspann for indexing applications in
excess of 150 strokes per minute
1. Rotate freewheel outer ring as shown in Figure B.
2. Remove (A) and (C) plugs and add oil through (A)
until oil flows from (C). The freewheel is now 7/8 full.
3. Reinstall (A) and (C) plugs with sealing washers and
tighten to prevent leakage.
Flushing Procedure
1. Rotate freewheel outer ring to locate plug (B) in the
6 o’clock position.
2. Remove plug (B) and drain oil from freewheel.
Remove plug (C) for better drainage.
3. Reinstall plug (B) and completely fill freewheel with
mineral spirits. Reinstall plug (C).

4. Rotate freewheel slowly for several minutes to break
up and dissolve any oily residue.
5. Remove plug (B) from 6 o’clock position and drain
mineral spirits. Remove plug (C) for better drainage.
6. Reinstall and tighten plug (B).
7. Relubricate the freewheel according to Oil
Lubrication Filling Procedure.
8. Reinstall and tighten open plugs to prevent leakage.
Grease Lubrication
Use greases selected from the following table:
FISKE BROS. Lubriplate “Aero”
Lubriplate “Low-Temp”
MOBIL Mobilith SHC-100
Mobilgrease XHP 221
Note: FRSG-300 thru 1000 freewheels are shipped from
Ringspann packed with FISKE BROS. Lubricate “Aero”
Do not use lubricants containing EP (extreme
pressure) additives such as sulfur phosphate,
graphite or molybdenum disulfide.
Use no other greases unless a specific
recommendation has been made by Ringspann.
If ambient temperature of freewheel application is
below +20°F/-7°C or above +120°F/ + 55°C, consult
Ringspann for special lubricant recommendations.
Grease lubrication may be used if:
oThe freewheel is inaccessible for frequent
lubrication maintenance.
oConditions do not permit maintenance frequency
required for oil lubricated freewheels.
oThe freewheel orientation is vertical (or greater
than 5 degrees from horizontal).
oThe freewheel is operated in the presence of
severe abrasive dust.
Do not attempt to convert oil lubricated freewheels to
grease lubrication. Any such conversion may result
in malfunction and will void any warranty.
Grease Lubrication Maintenance
Add grease to freewheel once per month under normal
operating conditions. Under severe operating conditions,
such as heavy dust or twenty-four hours per day
operation, grease should be added every 2 weeks
Grease Lubrication Procedure
1. Wipe all grease fittings clean and then pump new
grease into all fittings until clean grease flows out
around the seals on both sides of the freewheel.
2.
Lubrication should be done with the freewheel at
normal operating temperature.
Note: Freewheels are designed to purge excess grease
during operation. Purge will stop as soon as internal
temperatures and pressures stabilize.
Use Recommended Greases Only
Freewheel Rebuilding Service
Disassembly and repair of Ringspann
freewheels in the field is not recommended and will void
any warranty.
Ringspann freewheels are precision devices
manufactured under careful controls to meet exacting
standards. When reconditioning is required, freewheels
should be returned to Ringspann for service
Rotating Equipment
Rotating equipment is potentially
dangerous and should be properly guarded. The user
should comply with all applicable safety codes to guard
rotating equipment.
Warranty
Ringspann Corporation “seller” agrees to repair or
replace (at its sole option), defective materials or
workmanship for a period of one year from the date of
delivery. Seller must be notified of such a defect within a
reasonable time after discovery (not to exceed thirty (30)
days), and the defective product must be delivered,
prepaid to the seller’s factory with evidence that, it has
been properly installed, maintained and operated in
accordance with the seller’s instructions. Seller’s limited
warranty excludes remedy for damage or defect caused
by abuse; failure to resist corrosion or erosion from any
corrosive agent or fluid, due to deposits of foreign
material from any fluid; modifications not executed by
Seller; improper installation or operation; defects or
failures arising out of, in any way related to, or as a
result either direct or indirect, of the Buyer’s failure to
properly advise Seller of all normal and special operating
conditions, known to or suspected by Buyer, when Seller
is manufacturing the Equipment for a specific operation;
or normal wear and tear under usage. This remedy is
exclusive and is given in lieu of any warranty of
merchantability, fitness, for a particular purpose or any
other warranty, whether express or implied. Seller shall
not be liable for consequential damages (including but
not limited to, loss of use, lost profits, business
interruption and the like), incidental damages, indirect
damages, whether the claim for such damage is based
upon warranty, contract, tort, strict liability or any other
theory of recovery.
RINGSPANN Tel: [phone]
CORPORATION Fax: [phone]
10550 Anderson Place Web: www.ringspanncorp.com
Franklin Park, IL 60131 Email: [e-mail]