freewheel types cross+morse roller ramp clutches outer race locking roller inner race spring loaded plunger contact free element sprag clutches these clutches are basically similar to conventional sprag clutches however in the overrunning mode the sprag elements are thrown out of contact with the stationary race by centrifugal force there are two basic types of clutch internally disengaging clutches where the sprag elements lift-off from the inner race types cr and rs/bf and externally disengaging clutches where the sprag elements break contact from the outer race and inner race types raz riz rbi and rsbi these clutches are intended for applications involving long periods of high speed freewheeling as no wear occurs in this mode internally-disengaging clutches consist basically of cylindrical inner and outer races with a complement of specially designed sprag elements contained in a cage which is connected to the outer race outer race overrunning spring loaded plunger power transmiss
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m series clutch couplings and stub shaft adaptors standard flexible couplings the m series clutch couplings are for shaft to shaft connection on high speed overrunning applications such as motor to large fan shaft couplings c3 to c7 use morse silent chain flexible couplings couplings c7.5 to c10 are morse gear couplings all couplings are fully sealed for grease lubrication it is preferred to overrun on clutch shaft as this permits removal of driving machinery by disconnection at flexible coupling without driven equipment being stopped for clutch shaft overrunning select coupling with mg or mo clutch if shaft diameters dictate that coupling will overrun select mr clutch clutch couplings accommodate up to 1/2 degree angular and 0.25mm parallel misalignment plus end float as indicated in table · specify direction of rotation of couplings · as viewed from clutch end left hand is inner race driving ccw · right hand is inner race driving cw · cross+morse power transmission solutions te l +
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types ckk csk sprag clutches clutch types ckk and csk combine individually sprung sprags with a deep groove ball bearing to provide a compact low cost high torque freewheel used for backstop and overrun applications these clutches provide the ideal low cost solution where space is restricted type ckk clutches are manufactured to the same specification as 62 series ball bearings except ckk 8 enabling direct interchange type ckkn clutches have inner race keyseated to din 6885 sht 3 except ckkn 40 to enable torque transmission by key clutches can also be provided to order with keyseat on outer race type ckknn type ckk-rs and ckkn-rs are fitted with metal shields and `o rings to retain lubricant and exclude dust for applications where relubrication is impractical or units running at higher temperatures type csk-rs has extended width races to enable fitting full rubber sealing discs making them ideal for dusty applications these units can also be supplied to order with inner race keyseat
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shaft mount backstop clutches and standard races for sprag elements shaft mounted sprag clutch assemblies for backstop applications cross+morse power transmission solutions te l +44 121 360 0155 types b200 500 dimensions clutch size b 203a b 204a b 205a b 206a b 207a b 208a b210a b 501a b 502 b 506 b 507a b 509a b 510a b 511a b 512a b 513 nominal torque 1 nm 53 68 108 237 373 550 780 82 82 217 217 339 339 712 882 1695 max shaft overrun rpm 2500 2500 2500 2000 2000 1800 1800 2500 2500 2000 2000 2000 2000 2000 2000 1800 b200 series plain outer race dimensions a mm 39.99/39.95 46.99/46.95 51.98/51.94 61.98/61.95 71.99/71.95 79.99/79.95 89.99/89 95 39.99/39.97 46.96/46.94 61.96/61.94 61.96/61.94 71.96/71.94 79.97/79.94 79.97/79.94 89.97/89.94 120.65/120.62 b mm 25.4 25.4 25.4 28.6 28.6 31.8 31.8 25.4 22.2 25.4 28.6 31.8 34.9 41.3 41.3 44.4 c2 mm 16.51/16.49 18.80/18.77 23.62/23.60 32.77/32.74 42.09/42.06 46.76/46.74 56.11/56.08 16.51/16.50 18.75/18.74 28.79/28.77 24.65/24.63 28.79/28.77 3
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types cnas and cnfs roller ramp clutches types cnas and cnfs freewheels are light duty roller ramp clutches manufactured to standard bearing dimensions cnas type as 62 series ball bearings and cnfs type as nu 23 roller bearings the clutches are mainly used for precision indexing and overrunning applications torque transmission is via a key on the shaft and for type cnas a press fit of outer into housing and type cnfs via two keys in the end face of the outer race cnfs only cross+morse power transmission solutions te l +44 121 360 0155 dimensions type cnas clutch size bore mm dh7 cnas 6 cnas 8 cnas 10 cnas 12 cnas 15 cnas 20 cnas 25 cnas 30 cnas 35 cnas 40 cnas 45 cnas 50 cnas 55 cnas 60 cnas 80 6 8 10 12 15 20 25 30 35 40 45 50 55 60 80 nominal torque 1 nm 1.7 3.0 5.4 10 11 32 45 72 114 148 174 184 246 406 850 max overrun 2 speed rpm inner race 5000 4300 3500 3200 2800 2200 1900 1600 1300 1200 1000 950 800 700 600 outer race 7500 6500 5200 4800 4300 3300 2900 2400 2000 1800 1600 1500 1
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types agf and agfn roller ramp clutches combined roller ramp clutch with ball bearings and outer race tapped to accept end flanges agf and agfn freewheels contain their own bearings to centre inner and outer races the outer race is tapped to enable fitting of a range of standard end flanges but can equally be adapted to fit gears or other driven equipment to suit special applications combination with standard end flanges or flexible couplings provides complete unit with its own lubrication enabling easy fitting to drive equipment cross+morse power transmission solutions te l +44 121 360 0155 fax +44 121 325 1079 type agfn incorporates a keyway in the outer race for torque transmission enabling simple connection of gears sprockets and pulleys clutches with the outer races having through drilled holes instead of tapped holes are available to order types alf alfn these clutches use v ring face contact seals for reduced overrun drag torque and also permits higher overrun speeds on outer
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type agf clutch assembled with torque arm end flange the combination of an agf series roller ramp clutch with f3 and f2/f4 flanges provide a unit complete with support bearing and its own integral lubrication system the units are primarily intended for backstop applications but can also be used as reciprocating arm on indexing applications when used as a backstop outer race rotation is prevented by cam bolt which by its shape compensates for misalignment the bolt must be radially free in its location to avoid loading the bearings so preferred location is with a slot of width 0.5mm above bolt dia c higher torque clutches for 25-35mm shafts can be supplied to special order cross+morse power transmission solutions te l +44 121 360 0155 fax +44 121 325 1079 agf-f2-f3 dimensions clutch size bore mm dh7 12 15 20 25 30 35 40 45 50 55 60 70 80 90 100 130 150 nom 1 torque nm 44 100 145 230 400 580 820 900 1700 2100 2800 4600 6800 11600 16000 25000 56000 maximum overrun speed 2 3100 2800 2400
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types agf and alf overrunning clutch couplings roller ramp clutch complete with one bearing support and lubrication system combined with rubber element flexible coupling for shaft-toshaft drives these clutch couplings consists of agf/alf type roller ramp clutches fitted with f2 end flange for lubricating combined with a high speed rubber element coupling dependent on torque requirements two sizes of coupling are available for most clutches these clutch couplings are to connect shafts used with overrun applications the rubber flexible element reduces vibration and compensates for alignment errors up to 0.7° angular 1.0mm axial and 0.5 coupling dia d7 parallel only maintenance of oil levels in the clutch including filling before use is required if required rubber elements can be replaced with coupling in situ except sizes 4sf 6.3sf two sizes of couplings are available the smaller es series being most popular with ks series used for higher torque applications two series of clutches are
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single revolution clutches cross+morse these clutches have rollers contained in a cage which is connected to the operating cam the cam is sprung loaded to push the rollers up the ramp to provide drive but if the cam is stopped by a trip pawl it fires the rollers out of engagement thereby disengaging the drive clutches can provide a single revolution multiple revolutions or a fraction of a revolution from a constantly rotating input extremely accurate positional control is provided with no accumulative error two types of clutch are offered the bat series for maximum torque capacity and ctk series for higher speed applications and replacement on existing machinery power transmission solutions te l +44 121 360 0155 fax +44 121 325 1079 dimensions bat series clutch size bat 12 bat 20 bat 25 bat 30 bat 40 bat 50 bat 60 bat 70 bat 80 bat 90 bat 100 bat 120 bore dh6 mm 12 20 25 30 40 50 60 70 80 90 100 120 rated max torque1 operating nm speed rpm 19 60 53 240 370 700 2750 2750 7000 7000 115
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types cr/bw and cr/bv backstop clutches most types of freewheels can be used for backstop applications but these clutches have been specially designed for this application mainly intended for fitting on conveyor or elevator headshafts their design makes easy installation on new or existing units cr/bw and bv series incorporate a torque arm with slot to engage with a bolt fixed to machine frame units are greased for life with labyrinth seals ideal for dust laden environments units can be mounted on horizontal or vertical shafts and are available with bore range 20mm to 120mm with torque capacity to 18,450 nm cr/bw series uses sprags to provide a high torque capacity at low unit cost bearing support is plain metal bushes with seals selected to retain grease and exclude dust and moisture cr/bv series employs roller ramp principle for extended wear life and faster operating speeds sealing is by shield protected labyrinth seals can be used for slow speed indexing when mounting these units i
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contact-free overrun clutches cross+morse these are basically similar to conventional sprag clutches but the sprags have their centre of power transmission gravity offset to the pivot point such that in the overrun mode the sprag elements are thrownsolutions out of contact with the stationary race by centrifugal force these clutches are for applications involving long periods of high speed freewheeling when no wear occurs such as barring motors starter drives pump and motor backstops three basic types of unit are available types rsbi and rbi types rsbi and rbi backstop clutches consist of cylindrical inner and 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
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