SPRAG TYPE FREEWHEEL CLUTCHES SERIES 400 AND 8000
SPRAG TYPE FREEWHEEL CLUTCHES SERIES 400 AND 8000
Sprag clutches are mechanical components that allow rotation in one direction while preventing it in the opposite direction. They are used in applications such as backstops, indexing, and overrunning clutches. The sprags are spring-loaded to maintain friction contact with the rings, ensuring reliable torque transmission.
Choosing the right freewheel clutch involves considering the type, size, torque requirements, and mode of operation. GMN offers various series tailored for different applications, including those requiring hardened mating rings or integrated lubrication and sealing.
GMN provides a range of freewheel clutch units, including complete units with integrated bearings, ball bearing units, and insert elements with or without rings. Each type is designed for specific torque and operational requirements.
The main components of GMN freewheel clutches include sprags, cages, springs, mating rings, seals, and bearings. These components are made from high-quality materials to ensure durability and performance.
Sprags are critical for the clutch's performance, with their size and geometry affecting torque capacity and indexing frequency. GMN offers different sprag series, each designed for specific applications and performance characteristics.
The torque capacity of a clutch is determined by the density and size of the sprags, as well as the precision of the clamping curve geometry.
GMN provides detailed technical specifications for each clutch series, including dimensions, operating temperatures, and lubrication requirements.
Proper installation, including adherence to tolerances and lubrication guidelines, is crucial for optimal performance and service life. GMN clutches are designed for easy maintenance and long-term reliability.
GMN freewheel clutches are used in various industries for applications requiring precise torque control and reliable performance. The selection table helps in choosing the appropriate clutch based on specific application needs.
GMN emphasizes quality management to ensure that all products meet international standards and deliver consistent performance.
- Operating Temperature: Steel cage up to 170°C, Plastic cage up to 140°C.
- Spring Systems: Two types - Tension spring and Meander spring. Tension springs offer longer service life with a max indexing frequency of 10 Hz, while Meander springs provide higher torque transfer with a max frequency of 60 Hz.
- Materials: Rings made of hardened and ground ball bearing steel, with specific hardness and surface finish requirements.
- Rings: Designed for press fit installation to ensure maximum torque capacity. Keyway installation supports torque transfer but requires a press fit for optimal performance.
- Seals: GMN rubber seals and RS seals protect against contamination and maintain lubrication, with operating temperatures up to 100°C and 110°C respectively.
- Bearings: Integrated ball and roller bearings with specific clearance and material specifications.
- Torque Development: Describes how torque is transferred and the impact of gap height on torque capacity.
- Stress Limits: Discusses the permissible stresses on sprags and rings, and the calculation of torque capacity for multiple clutches in a row.
- Installation Tolerances: Specific tolerances for shaft and hub installations are provided, along with guidelines for cleaning and press fitting.
- Lubrication: Lifetime oil lubrication is recommended for optimal performance.
Catalog excerpts
Sprag Type Freewheel Clutches
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GMN Page 4-5 Sprag clutch technology Page 6-7 Freewheel clutch selection Page 9 GMN freewheel clutch types Page 10-13 Clutch Components Page 14-19 Sprags Page 16 Cage Page 17 Springs Page 17 Mating rings Page 18 Seals Page 18 Ball bearings Page 19 Roller bearings Page 19 Torque Capacity Page 20-23
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Technical data Page 24-55 GMN Complete freewheel clutch units Page 26-35 GMN Ball bearing freewheel clutch units Page 36-41 GMN Freewheel clutch insert elements with rings Page 42-45 GMN Freewheel clutch insert elements Page 46-53 GMN roller bearings (accessory) Page 54-55 Speed Limits Page 57 Installation Page 58 Tolerances Page 59 Lubrication Page 60-61 Service life Page 62 Applications Page 62-63 Selection Table Page 64-65 Internet Quality Management Page 66
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GMN Sprag type freewheel clutches
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Based on its many years of experience in the development and production of high-quality machine components, GMN has chosen to specialize, within the field of freewheel-clutches, in the production of efficient, long-life sprag type freewheel clutches. The standardized model series offer a large selection of feature options to furnish effective freewheel-clutch solutions for almost any field of application. Emphasis is placed on the highest precision in the development and production of GMN sprag type freewheel clutches. This ensures their certification to international standards and produces consistent,...
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Freewheel clutches are machine elements which permit rotation in one direction (idle) and stop rotation or transmit torque in the opposite direction. The sprags slide on the rotating raceway surfaces of the rings (sliding friction) in the idle direction. Torque is not transmitted from the driving side to the driven side under these conditions. Gap height The inner and outer rings define a constant gap height h0 (start gap) in which the sprags slide over the raceways in the idle direction. Spring system The sprags are spring-loaded to ensure constant friction contact between the sprags and the...
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Clamping direction Applications Backstop A Backstop application is where rotation is allowed in one direction and stopped in the opposite. When rotating the clutch in the driving direction, the sprags will instantaneously engage to drive the races/rings in the desired direction. This instantaneous engagement is a result of static friction contact with the raceways because of the specifically designed clamping curve. Torque could be transmitted through the sprags now. Angle of twist and torque transfer As the force transfer increases, the sprags become more upright and expand the distance between...
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| GMN^pragTypT Freewheel Clutches OMN Sprag Type Freewheel Clutches Products
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Freewheel selection Complete freewheel clutch units + Freewheel clutch insert element + Inner and outer ring + Ball bearing + Roller bearing + Seals (optional) Ball bearing freewheel clutch units + Freewheel clutch insert element + Inner and outer ring + Ball bearing + Seals (optional) Freewheel clutch insert elements with rings + Freewheel clutch insert element + Inner and outer ring Freewheel clutch insert elements + Freewheel clutch insert element GMN offers highly effective, long-life freewheel solutions for many applications. All GMN Freewheel clutches can be used as backstop, indexing or...
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GMN Complete freewheel clutch units Powerful and compact complete clutch solutions with integrated fixed and floating bearings for high torque requirements. Components: Insert element FE 400 Z / FE 400 M + Raceway rings Inner ring press fit Outer ring press fit + Ball bearing + Roller bearing + Oil lubrication + GMN rubber seals Width: 34 mm Operating temperature: max. 100oC (Pg. 26-27) Components: Insert element FE 400 Z / FE 400 M + Raceway rings Inner ring keyway Outer ring press fit + Ball bearing + Roller bearing + Oil lubrication + GMN rubber seals Width: 34 mm Operating temperature: max....
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GMN Ball bearing freewheel clutch units Economical freewheel-clutch solutions with integrated ball bearings for small to medium torque requirements in standardized dimensions of ball bearing series 62 (DIN 625). Components: Insert element FE 400 Z / FE 400 M + Raceway rings Inner ring keyway Outer ring press fit + Ball bearing + Roller bearing Lubrication: Oil or grease Width: 27 mm Operating temperature: max. 140oC Higher temp. on request (Pg. 34-35) Components: Insert element FE 400 Z2 + Raceway rings Inner ring press fit Outer ring press fit + Ball bearing + Grease lubrication1 + RS seals1...
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GMN Freewheel clutch insert elements GMN Freewheel clutch insert elements with rings Series FR and FRN consist of a freewheel clutch insert element A freewheel clutch insert element consists of a cage, a and hardened and ground thrust rings. spring and a size dependent number of sprags. Components: Insert element FE 400 Z / FE 400 M + Raceway rings Inner ring press fit Outer ring press fit Lubrication: Oil or grease Width: 12 mm Components: Insert element FE 400 Z / FE 400 M + Raceway rings Inner ring keyway Outer ring press fit Lubrication: Oil or grease Width: 12 mm All GMN Freewheel clutch...
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Components: ■ Sprags ■ Spring: tension spring ■ Cage: steel / plastic Lubrication: Oil or grease Width/installed width: 11 mm / 12 mm Components: ■ Sprags ■ Spring: meander spring ■ Cage: steel Lubrication: Oil or grease Width/installed width: 11 mm / 12 mm Components: ■ Sprags ■ Spring: tension spring ■ Cage: steel / plastic Lubrication: Oil or grease Width/installed width: 6.3 mm / 7 mm Components: ■ Sprags ■ Spring: tension spring ■ Cage: steel Lubrication: Oil or grease Width/installed width: 16 mm / 16.5—18 mm 19 mm / 19.5—21 mm 25 mm / 25.5-27 mm Operating temperature: max. 170oC (steel...
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GMN Sprag Type Freewheel Clutches Freewheel Clutch Components
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GMN Freewheel Clutch Components Components Performance features Use of the highest quality components is the basis for the outstanding performance and the long service life exhibited by GMN sprag type freewheel clutches. outer ring sprag spring ball bearing roller bearing seal inner ring Freewheel clutch insert elements GMN series FE 400 Z, FE 400 M, FE 400 Z2 and FE 8000 have, as their basic components, sprags, sprag cage and spring. GMN series FR and FRN additionally include inner and outer rings which are intended for press-fit or key way connect to the mating parts. GMN Sprag type freewheel...
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