Stieber Bearings Egypt Bearings
Overrunning Clutches and Backstops

Stieber Bearings Egypt Bearings

What can industrial freewheels do ?

RIV Company is the Egyptian agent of STIEBER GmbH, specialized in freewheels, freewheels are directional couplings, which means that the driving member rotates the driven member in one direction, while automatically disengaging itself from the driven member when the direction of rotation is reversed, the two operating states are:
  1. Transmission of torque.
  2. Idling (overrunning).

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The freewheels may be employed as:
  1. Overrunning clutch, the freewheel disengages automatically when the driven member rotates faster than the driving member.
  2. Indexing clutch, the freewheel allows the conversion of reciprocating motion into rotational movement.
  3. Backstop, the freewheel allows rotation in one direction only, it overruns continuously during operation, the freewheel prevents reverse rotation if the drive is disconnected.
Two basic versions are available, the overrunning speed determines the selection of the appropriate model:
  1. Grip-roller freewheels for low to medium overrunning speeds and for indexing clutches.
  2. Sprag freewheels for high overrunning speeds and for backstops.

Stieber Bearings Egypt BearingsInstalled in a drive system as an overrrunning clutch,they automatically disengage a faster-running driven part from a slowerdriving part.
 APPLICATIONS
  • Ventilators
  • Standby drives shredders
  • Butcher machines
  • Rotary furnaces
  • Dry cleanning installations

 Stieber Bearings Egypt BearingsUsed as backstops, they automatically prevent unintentionalrotation opposite to the desired direction of drive, without having toapply external energy.
 APPLICATIONS
  • Gear drives
  • Motors
  • Pumps
  • Elevators
  • Conveyors, cranes

 Stieber Bearings Egypt BearingsApplied as indexing clutches, they transform reciprocalmotion into intermittent rotation.
 APPLICATIONS
  • Printing machines
  • Packing machines
  • Sewing machines
  • Feeding mechanisns

 Stieber Bearings Egypt BearingsUsed as single revolution clutches, with exactnessand indexing accuracy, they enable coupling and disengagement of continuouslyrunning drives and periodically operated installations.
 APPLICATIONS
  • Printing machines
  • Packing machines
  • Sewing machines
  • Feeding mechanisns

 

Locking elements


 Locking Rollers

 Stieber Bearings Egypt Bearings

Individual spring compensates for machining tolerances. Therefore eachroller is loaded with the same torque. All rollers are instantly lockedwhen coupled.


 Sprags

 Stieber Bearings Egypt BearingsCompact sprag element easily integrated into a mechanismwhen used with hardened shaft and housing. Hight shaft overrunning speedspossible with correct lubrication.
 Stieber Bearings Egypt BearingsSprags centrifugally disengage from shaft during overrunning to becomenon-contact and non-wearing. Accepts high eccentricity and any type oflubricant. High shaft speeds possible with reduced lubrication.

 

Input

Input inner race

1 Outer race + n CW rotation, 2 Inner race- n CCW rotation, alpha clamp angle
 Stieber Bearings Egypt Bearings Stieber Bearings Egypt Bearings
 Coupled + n1 < + n2 Overrunning n1 > n2 Coupled - n1 < - n2 Overrunning - n1 > - n2

Input outer race

1 Outer race + n CW rotation, 2 Inner race- n CCW rotation, alpha clamp angle
 Stieber Bearings Egypt Bearings Stieber Bearings Egypt Bearings
Coupled + n2 < + n1, Overrunning + n2 >+ n1Coupled - n2 < - n1, Overrunning - n2 > - n1

Types

 

Types

 Stieber Bearings Egypt Bearings

 ASK

 CSK / CSK..P

 CSK..2RS

 GFK

Average overrunning
speed [m/s]		Inner race overruns12121212
Outer race overruns1212128
Clamping elementRoller 1)X  
Sprag X X X
Individually spring loadedXX X X
Cage X X X
BearingBall bearingXX X X
Operating modeOverrunning clutchXX X X
BackstopXX X X
Indexing clutch[X]X X&nbs p;X
Types ASK CSK / CSK..P CSK..2RSGFK
Torque TkN [Nm] 60..210 2..260  2..14037..365 
Outer dimensions
corresponding to ball bearing sizes		 606262 + 5 mm 59
Standard lubricationGreaseXXXX


Types

 Stieber Bearings Egypt Bearings

 KI

AS

 ASNU

AE

AA

NF

Average overrunning
speed [m/s]		Inner race overruns64,54,5555
Outer race overruns777121212
Clamping elementRoller 1)XX X XXX
Individually spring loadedXX X X XX
CageX   
BearingNoneXX X XXX
Operating modeOverrunning clutchXX X XXX
BackstopXX X XXX
Indexing clutch[X]X X XXX
Types  KIASASNUAEAANF
Torque TkN [Nm] 0,63..2,32..850  9..3560013..465013..465016..35500 
Outer dimensions
corresponding to ball bearing sizes		 62..NU23..   
Standard lubricationOilXXXXXX


Types

 Stieber Bearings Egypt Bearings

DC

Average overrunning
speed [m/s]		Inner race overruns12
Outer race overruns8
Clamping elementSpragX
Individually spring loadedX
Cage 
BearingNoneX
Operating modeOverrunning clutchX
BackstopX
Indexing clutch[X]
Types DC
Torque TkN [Nm] 50..3840 
Standard lubricationOilX


Types

Stieber Bearings Egypt Bearings 

BAT

Average overrunning
speed [m/s]		Inner race overruns-
Outer race overruns2
Clamping elementRollerX
CageX 
BearingNoneX
Operating modeIndexing clutchX
Types BAT
Torque TkN [Nm] 20..11500 
Standard lubricationOilX


Types

 Stieber Bearings Egypt Bearings

 NFR

AV

 RSBW

Average overrunning
speed [m/s]		Inner race overruns1,51,51,5
Outer race overruns1,5--
Clamping elementRoller 1)XX  
Sprag  X 
Indi vidually spring loadedXX X 
Cage X 
BearingSleeve bearingXX X 
Operating modeOverrunning clutchX  
BackstopXX X 
Indexing clutchXX X 
Types NFR AV RSBW
Torque TkN [Nm] 16..150220..8800  435..3900
Standard lubricationGreaseXX
 Oil

X

  


Types

 Stieber Bearings Egypt Bearings

 NFR

AL / ALP

 GFR / GFRN

 ALZ

Average overrunning
speed [m/s]		Inner race overruns5555
Outer race overruns12151515
Clamping elementRoller 1)XX XX
Individually spring loadedXX X X
BearingBall bearingXX X X
Operating modeOverrunning clutchXX X X
BackstopXX X X
Indexing clutch[X]X X X
Types NFR AL / ALPGFR / GFRNALZ
Torque TkN [Nm] 200..27800 44..23000044..56000400..16000
Standard lubricationOilXXXX


Types

 Stieber Bearings Egypt Bearings

 FSO

HPI

FSO

Average overrunning
speed [m/s]		Inner race overruns5,5 - 9-5,5 - 9
Outer race overruns1,7 - 4,79 - 13,5
Clamping elementSpragXXX 
Individually spring loadedXXX 
CageXXX 
BearingBall bearingXX X 
Operating modeOverrunning clutchX X 
BackstopXX X 
Indexing clutchXX X 
TypesFSOHPIFSO
Standard lubricationGreaseXXX
 Oil
< P>X

 

X



Types

Stieber Bearings Egypt Bearings

 CR

RSBF

RSBI / RBI

Average overrunning
speed [m/s]		Inner race overruns-60
Outer race overruns6060-
Clamping elementSpragXXX 
Individually spring loadedXXX  
CageXXX 
BearingNoneXXX 
Contact free overrunningInternal  X
ExternalXX 
Operating modeOverrunning clutch [X]
BackstopXX X 
TypesFSOHPIFSO
Torque TkN [Nm]  180..2300  68..2450 120..42000
Standard lubrication Oil

X

X

X



Types

Stieber Bearings Egypt Bearings

RAZ / RANZ

RIZ / RINZ

Average overrunning
speed [m/s]		Inner race overruns-20
Outer race overruns20-
Clamping elementSpragXX
Individually spring loadedXX
CageXX
BearingBall bearingXX
 Contact free overrunningInternal X
ExternalXX
Operating modeOverrunning clutch[X][X]
BackstopXX 
TypesRAZ / RANZRIZ / RINZ
Torque TkN [Nm]  50..16300 50..16300
Standard lubrication Grease

X

X



Types

Stieber Bearings Egypt Bearings

AL..G

ALB..M

Average overrunning
speed [m/s]		Inner race overruns-3
Outer race overruns24-
Clamping elementRoller 1)XX
Individually spring loadedXX
BearingBall bearingXX
Operating modeOverr unning clutchX
BackstopX 
 Indexing clutch 

[X]

TypesAL..GAL..BM
Torque TkN [Nm]  44..56000 6850..240000
Standard lubrication Oil

X

X


Agent : RIV Company
6 Orabi Street,
P.O.Box 101, Cairo 11511, Egypt
Tel. : +202-5749921, +202-5759921
Fax. : +202-5776236, Tlx. : 92808 RIV UN
Stieber Bearings Egypt Bearingsstieber@riv.org

Stieber Bearings Egypt Bearings

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