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Freewheel Clutches

Freewheel Clutches

Product catalog summary

Overview: The document provides a comprehensive guide on freewheel clutches, detailing their functions, applications, and types. Freewheels are precision clutches that lock to transmit torque in one direction and release in the opposite direction, used in industries like agriculture, machinery, and packaging for overrunning, indexing, and backstopping.

Freewheel Functions and Applications: Freewheels allow the output to rotate faster than the input or continue rotating if the input stops. They are essential in starter drives, bi-motor drives, and preventing backdrive in high-speed drives. Indexing transforms reciprocating motion into unidirectional intermittent motion, useful in conveyors and packaging. Backstop clutches prevent reverse rotation, protecting machinery from damage.

Types of Freewheels: The document categorizes freewheels into four main types: Industrial Ratchet Freewheels, Sprag Clutches, Roller Ramp Clutches, and Contact Free Element Sprag Clutches, each with specific applications and operational characteristics.

Industrial Ratchet Freewheels: Basic yet robust, ideal for low-speed applications, consisting of inner and outer races, driving pawls, actuating springs, and support bearing balls. Not suitable for backstop applications.

Sprag Clutches: Use spring-loaded sprags to transmit torque through a wedging action, compact and suitable for overrunning, indexing, and backstop applications. Available in various designs to meet specific needs.

Roller Ramp Clutches: Use locking rollers between inner and outer races, providing accurate indexing and suitable for applications with long periods of overrunning. Available in designs with integral bearings and flexible couplings.

Contact Free Element Sprag Clutches: Designed for high-speed freewheeling, using centrifugal force to disengage sprag elements, minimizing wear. Suitable for backstop and overrunning applications.

Specifications: The document outlines specifications for various clutches, including metal seals, permissible operating temperatures (-40°C to 130°C, max 150°C for short periods), and torque transmission methods. Clutches are made with bearing clearance C5, with specific housing and shaft tolerances recommended.

Sprag Clutches: Designed for high torque transmission in confined spaces, featuring a double cage design for load sharing. Made from 52100 bearing steels, available in disengaging and engaging types, with dimensions and construction details provided.

Shaft Mount Backstop Clutches: Describes shaft-mounted sprag clutch assemblies for backstop applications, detailing dimensions, nominal torque, and maximum overrun speeds, with material and tolerance specifications.

Roller Ramp Clutches: Types CNAS and CNFS are light-duty clutches for precision indexing and overrunning applications, manufactured to standard bearing dimensions, with detailed specifications and installation guidelines.

High Torque Roller Ramp Clutches: Types AA, AE, ANF, and ANR are designed for applications within an encased lubrication system, featuring keyways for torque transmission and axial clearance for shaft temperature expansion, with detailed specifications provided.

Installation Guidelines: Emphasizes proper alignment and centering of inner and outer races using external bearing support, with specific shaft and housing tolerances and instructions for keyway usage and press-fit requirements.

Types and Features: Highlights AGF and AGFN clutches for their integrated bearings and adaptability, with end flanges and flexible couplings for complete units with lubrication systems.

Applications: Suitable for high-speed indexing, continuous overrun applications, and backstop applications, with rubber element flexible couplings for shaft-to-shaft drives to reduce vibration and compensate for alignment errors.

Lubrication and Maintenance: Clutches are supplied without lubrication and must be filled prior to operation, with guidelines for maintaining oil levels and selecting appropriate lubrication types.

Additional Notes: Includes contact information for CROSS+MORSE and instructions for ordering specific clutch configurations and components.

Key Features: Emphasizes compatibility with existing systems, torque capacities, and availability of sealed units for enhanced durability.

Catalog excerpts

Freewheels - their Functions and Applications2Freewheel Types4-5 Backstop Elements - B200 & B500 10 Backstops: - CR 21 - CR/BV 20 - CR/BW 20 - RSBF 21Combined Sprag and Bearing Units:- CKK& CSK 8 - GFK 17Contact Free Clutches:- RAZ&RIZ 21 - RSBI& RBI 21Couplings - AGF 16 Keyseated Outer Race Clutch - AGFN 13-14 Index Clutches - HT 7 Miniature Freewheels - KI 17 Ratchet Freewheels - IRF 19 Roller Ramp Clutches:- AA 12 - AEF 12 - ANF 12 - ANR 12 - CNAS 11 - CNFS 11 Roller Ramp Clutch with Bearing - ASK 17 Roller Ramp Clutch - AGF Self Contained 13-15 Single Rev Clutches: - BAT 18 - CTK 18Sprag Clutches:- M Series 5-6 - PB7Sprag Elements - BW 9-10 > Catalogue Selection INDEX EnquiryCD Contents > CROSS+MORSE Power Transmission Solutions Power Transmission Solutions size="-1">

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Power Transmission Solutions Tel +44 121 360 0155 Fax +44 121 325 1079 Email [email protected] As already described freewheels are used for three types ofoperation:- > Sprag Clutches consist of plain diameter concentric inner and outer races with individual spring loaded sprags between. A light spring ensures that the sprags always maintain contact with the races.Torque is transmitted by the wedging action of the sprags betweenthe races. The sprags are formed with the dimensions across one set ofdiametrically opposite corners "A", less than the radial gap betweenthe inner and outer races,...

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Power Transmission Solutions Tel +44 121 360 0155 Fax +44 121 325 1079 Email [email protected] Types RSBI and RBI backstop clutches consist of cylindrical innerand outer races between which are located individually spring loaded, special shape sprag elements contained in a cage. The cage is flexibly connected to the inner race to allow the sprags to engage easily during torque application. When the inner race rotates at high speed the off-centre weight of the elements causes them to rotate within the cage to produce a gap with outer race.These clutches are designed for backstop applications...

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Freewheel Clutches

Freewheel Clutches

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