One Way Clutches Bearing, Clutch Bearings, Lubrication, Maintenance,and Installation for CSK Freewheels

Designing and Manufacturing Overrunning Clutches, Sprag Clutch, One Way Bearing

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Lubrication, Maintenance, and Installation
Instructions for CSK Freewheels.
(For Stieber type 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. 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 -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