Lubrication, Maintenance,and Installation for CSK Freewheels

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LUBRICATION, MAINTENANCE and INSTALLATION
INSTRUCTIONS for CSK FREEWHEELS.
(For Stieber Clutches)
LUBRICATION
The CSK freewheels are supplied filled with grease. This lubrication is adequate for normal
operating conditions and need not be re-greased.
MAINTENANCE
The CSK freewheels are grease filled at the factory and have a maintenance free for life design
that does not require lubrication. No attempt to re-grease this clutch should be made, as
additional grease in the sprag assembly can cause the clutch to fail, and will void the warranty.
INSTALLATION
The installation of the CSK freewheel is the same as a ball bearing.
Direct blows on the races or cages will damage the freewheel. When pressing into the housing,
pressure must only be exerted on the outer race. When pressing onto the shaft apply pressure
only on the inner race.
Important steps to remember:
A.) Check bore and shaft tolerances.
B.) Check clutch for proper rotation.
C.) To fit clutch in bore, apply pressure only to the end face of the outer race.
D.) To mount clutch on shaft, apply pressure only to the end face of the inner race.
E.) Freewheel the clutch by hand before subjecting to test operation.
F.) Clutches are greased for life and do not need re-greasing.

General Purpose Clutches
CSK, CSK..2RS
Overrunning, Indexing, Backstopping
Bearing Envelope (62 Series) Design, Sprag Clutches
Typical Mounting Arrangement
The Model CSK clutches must be mounted with a press fit on both the outer and inner races. The shaft diameter tolerance must be held to a n6. The bore of the housing for the outer race should be a N6 tolerance.

BB-Series Tsubaki Cam Clutches
Installation and Usage
1. The BB Series Cam Clutch was designed for press fit installation.
Correct interference dimensions must be maintained to obtain maximum bearing and clutch performance.
Always maintain correct installation dimensions at the shaft and housing.
(See the dimension table.)
2. The clutch should be mounted on the shaft by rotating it in the direction marked by the arrow shown on the
clutch plate.
3. To install the clutch, use a press tool of the appropriate diameter to apply even pressure over the entire face of
the inner or outer race.
4. Do not hammer or apply other shock to the clutch.
5. Make sure the housing has enough strength to withstand the pressure required for the press fitting installation of
the clutch.
6. If foreign objects get into the clutch mechanism, they may prevent the clutch from operating correctly. Prepare
a seal to protect against any possibility of foreign objects entering the clutch
mechanism.
Lubrication
1. Since grease is applied before delivery, there is no need to apply and grease before use.
2. If the ambient operational temperature is high or if the unit is operated continuously at high speed, there is the possibility that grease may leak from the unit. In this case, use a metal bearing seal to prevent leakage.
3. If the clutch is used with an oil lubricant, it can be installed normally.However, the oil lubrication should be applied inside the unit evenly.
4. Do not use greases or lubricants with EP additives.

Freewheel-Clutches - Examples

Important applications

	conveyers (back stopping)
	conveyers (speed compensation)
	copiers (paper feeding)
	furniture production (glue roller drive)
	high voltage switches
	mixers (safety clutch)
	motor bikes (automatic gear)

	packaging machines (overrunning clutch)
	paper handling (material feed)
	printing presses (ink roller drive)
	sowing machines (seed feeder)
	textile machines (material feed)
	winches (backstop)

Three basic applications of freewheel-clutches

	Indexing elements: Indexing elements change an oscillating to an intermittent rotary motion. An example could be a ratchet or a stock-feeding device.
	Backstops: Backstops prevent self reversing due to load condition when the machine is not activated.
	Overrunning clutch: Freehweel-clutches are also used as overrunning clutches to maintain driven unit activated even during slowdown, or in the case of two speed operation (by indepent motors) to switch to the higher speed by passing the slower. The most notorious application is the bycicle.

Indications of lubrication for Sprag-Type Freewheel-Clutches

Proper lubrication with only qualified lubricants is the prerequisite for achievement of highest efficiency and long life of our high quality clutches. Only with use of oil or grease lubricants specified in the tables below, GMN will warrant their freewheel-clutches and their trouble free function. Whenever possible, use only oil or oil mist lubrication rather than grease lubrication. Please contact our technical staff if operating temperatures are in the upper or lower temperature tolerance range, if the clutch has to be mounted in vertical position or if there should be any other special conditions.

Oil
For oil mist lubrication please use hydraulic oil HM 10 or HM 32. The use of lubricants with additives that decrease the coefficient of friction, i.e. MoS₂ or graphite is not possible.

Oil Type	Operating Temperature Range
Oil Type	-15° C to 30° C 5° F to 86° F	15° C to 90° C 59° F to 194° F	60° C to 120° C 140° F to 248° F
Hydraulic Oil	Hydraulic Oil HM 10	Hydraulic Oil HM 32 D	Hydraulic Oil HM 100
Motor Oil		HD-Motor Oil SAE 10 W ATF-DEXRON III	HD-Motor Oil SAE 30

Oil lubricants described above - except hydraulic oil - are from the automotive sector. These lubricants can easily be obtained at automotive supply outlets and are excellent for the lubrication of our frewheel-clutches. Lubricant qualification: HD-motor oil SAE 10 W or SAE 30 is equal to "API-Service SE or CC" and MIL-L-46152B".

Important: Oils shown in the table are only to be mixed with oils of the same qualification.That means ATF oil with ATF oil, HD-motor oil with HD-motor oil etc. If there is any change of oil from one qualification to the other, it is necessary to clean the frewheel-clutch and mating parts with cleaning or test benzine. Never use trichloroethylene or perchloroethylene.

The oil level should be in relation to the size of the freewheel-clutch. In normal installation position, not operating, one third of the clutch should be submerged in oil.

For oil mist lubrication systems we recommend ample clean oil, free of moisture, be sprayed directly onto clutches. Open or unsealed housings should be inspected frequently - at least dayly - for proper lubrication level.

Our double sealed freewheel-clutches (series FND and FPD) are filled with an oil for operating temperature range 15?C to 90?C if not specially ordered.

　

Grease
Greases from different manufacturers may not be compatible. Consult with GMN for proper lubrication recommendations.

Please note: There is no universal grease for all service and operating conditions. The table below lists suitable grease types and characteristics for GMN freewheel-clutches.

　

Producer	Grease Type	Saponification	Oilbase	Operating Temperature at GMN Freewheel Clutches	Characteristics
Kl黚er Lubrication	ISOFLEX LDS18 Special A	Lithium	Ester/Mineral	-30?C....130?C -22?F....266?F	Deep temperature and longterm grease with high resistance to aging and corrosion.
Shell	Alvania RS	Lithium	Mineral	-10?C...120?C 14?F....248?F	Long term grease with high resistance to aging and corrosion.
Kl黚er Lubrication	Bio BM 72-50	Polyurea	Ester	-20?C...120?C -4?F....248?F	Biological grease especially for overrunning and backstopping
Kl黚er Lubrication	Synth HB 72-102	Polyurea	Ester	-40?C...180?C -40?F....356?F	Synthetic grease especially for overrunning and backstopping

First two grease types to be used in standard applications.

The amount of grease should cover approximately 60% of the free volume in the clutch. Please take care for homogene dispersion of the grease all over the clutch.

GMN uses ball and roller bearing grease which is continually monitored for maximum quality and maximum clutch life. Sealed ball bearing clutches "RS" and "2RS" are shipped grease lubricated with grease type Isoflex LDS 18 Special A, if not specially ordered.

GMN can not endorse or guarantee the quality of lubricants, purchased by their customers to be used with GMN clutches. Last update of the qualifications:

[Keywords]
Clutch Functions and Applications
All Formsprag/Stieber clutches described
in this catalog are “overrunning” clutches,
i.e., they will drive in one direction but
overrun (freewheel) in the other direction.
The preparation of a catalog such as this
can be undertaken only by a company
having very broad experience in all
aspects of the use and application of
overrunning clutches.
Formsprag/Stieber is such a company,
and the information given in this catalog
is based on the accumulation of many
years of experience in the design, construction
and application of overrunning
clutches. In physical appearance, the
Formsprag/Stieber catalog overrunning
clutches are all very much alike. However,
different types of applications will involve
differing load characteristics and will call
for variations in the technical details of
clutch construction. For this reason the
clutches are divided into three basic
types of applications for which they are
intended.
The three basic applications are:
• Overrunning
• Indexing
• Holdbacks or Backstops
These three categories are described in
greater detail under those headings in this
catalog.
This class of applications is typified by
standby and compound drives. For example,
a steam turbine and a standby electric
motor may be connected to a single
driven shaft through overrunning clutches.
The shaft can then be driven by either
the turbine or the motor or both with no
further modification of the installation.
The turbine drive clutch automatically
engages when the turbine starts to drive,
but automatically overruns when the load
is transferred to the electric motor.
Considerations
• Type of motor
• Max starting torque
• Internal combustion engines,
please consult Formsprag
• Nominal driving torque
• Range of driving speed
• Inertia (WR2) of the driven masses
• Range of overrunning speed
• Number of starts during service life
• Shaft diameter
Applications
• Dual motor/engine drives
• Conveyor belts
• Creep and starter drives
• Disengagement of centrifugal masses
In backstopping or holdback* applications,
one race is always fixed to a stationary
ground member. The function of the
clutch is to permit rotation of the mechanism,
connected to the other race, in one
direction only, and to prevent any rotation
in the reverse direction at all times.
Although the clutch normally overruns
most of the time, it is referred to as a
holdback or backstop in conveyors, gear
reducers and similar equipment because
its function is to prevent reverse rotation.
*“Holdback” is a name given to a backstop
clutch when mounted on an inclined conveyor
head shaft.
Considerations
• Motor breakdown torque
• Maximum dynamic reverse torque
due to elasticity of the locked parts:
elastic belts, shafts of more than 9 feet
(3 meters) long
• Range of overrunning speed
• Number of torque applications
during service life
• Shaft diameter
Applications
• Inclined conveyors
• Escalators
• Pumps
• Gear drives
• Fans
In this type of application, reciprocating
motion applied to the driving race is transformed
into intermittent motion in only one
direction at the driven race. For example,
if a pinion is connected to the driving race,
a rack meshing with the pinion can give
reciprocating motion to the driving race.
The clutch will then advance or “index”
the work (driven race) on each forward
stroke of the rack, but will not return or
back-up on the return stroke of the rack.
Considerations
• Number of cycles/min
• Index angle
• Nominal torque
• Inertia (WR2) of the driven masses
• Accelerations of the driving
member
• Number of indexes during
service life
• Shaft diameter
Applications
• Metal stamping
• Pressworking
• Packing machines
• Indexing tables
• Assembling machines
• Printing machines
Overrunning clutch Backstopping clutch Indexing clutch
Clutch Functions and Applications
Overrunning
The clutch allows overrunning of large inertia loads upon stopping
and prevents backdriving damage to the drive system.
Clutch Models: FS/FSO, AL, GFR
Backstopping
The overrunning clutch is used to backstop (prevent
reverse rotation) the drive rollers in a material feed and
check indexing application.
Clutch Models: FSO, AL, GFR, RSBW
Clutch-Couplings
Clutch Couplings are used for dual drive of a pump or
fan, and when there is a need to connect inline shafts.
The clutch coupling prevents backdriving of the other
drive source when operating at motor speeds. Clutch
couplings allow for the transition from one drive source
to another without controls.
Clutch Models: FW, FWW, ALKMS, RIZEL,AL..KMSD2,
RIZ..ELG2
Dual Drive
FSO clutches are used in
dual drive applications to provide
instantaneous clutching from
one drive to the other in case of the
failure of either.
Backstopping
The LLH Holdback clutch is used to backstop (prevent
reverse rotation) the incline conveyor in a material
handling application.
Indexing
Indexing clutches are used to convert reciprocating linear
motion to incremental rotary motion for conveyor or material
feed applications.
Clutch Models: HPI, AL