Sprag-Type Freewheel-Clutches

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F NaF Nifriction contactFRFunctional partsMeander springFreewheel-Clutch FE 400 Zand FE 400 Z2GMN Sprag-Type-ClutchesBasic Information – Functional PartsOver and above the mentioned mathematicalprerequisites for the engagementsurface of the sprags and their properand reliable functioning, there are designcharacteristics which make optimumusage possible based on the mathematicalconditions.The sprags with their constant engagementangles, based on the logarithmicspiraled engagement curve, assureexact indexing. This will provide goodguidance through the cage and reliablepretension. Through the force directionof the spring, the sprags receivepretension within the cage and areforced to the inside. The enlarged headof the sprag prevents a slip through tothe inside.Press fit of thinwalled ringsThe thin walled freewheel-clutch ringstransmit the torque moment with thefriction contact of the press fit. Slippageof the pressed in or pressed on rings isimpossible, because the friction contactof the ring to the bore and to the shaft,increases in proportion to the appliedtorque moment.Slippage will not occur even when anunusual amount of moment or loadtakes place. The tangential force F TA =M/R L respectively. F Ti = M/r L presses therings with approximately 20 times thenormal force F Na,i =F Ta,i · cot α i (α a ).This increases the press fit preset frictioncontact.A special three-dimensional meandershaped spring was developed for ourfreewheel-clutch model FE 400, alsocalled FE 400 M.This spring is made of spring steel wire,class II quality and produced in theendless method on a spring formingmachine designed and built by GMN.Freewheel-Clutch FE 400(FE 400 M)These freehweel-clutches are especiallysuited for every precise and fast indexingapplication.The meander spring is hooked to thesprag and supported through the cage.Over a long spring distance with twoforce components F B and F T (bendingand torsion) spring tension F R ismaintained to optimum pretension foreach of the individual sprags.This freewheel-clutch can also be usedas a backstop with idling speeds ofv < = 20 m/min .This model is used as a backstop oroverrunning clutch at idling speeds ofv < 60 m/min.A circular spring is placed over all spragsfor pretension, due to the small leverarm“s”. This causes a minor drag torquewhich results in free running.This type of pretension is available in twoseries (Z; Z2) with different widths(see page 14).For low indexing frequency f < s = 20 Hzthis freewheel-clutch can be used as anindexing element.SFα aF TF Bhubouter ringF Taloaded spring during idlingloaded spring under full torqueunloaded springinner ringF Tishaftα i10
GMN Freewheel-ClutchesSeries 40011
Page 2 and 3: QUALITÄTS-MANAGEMENTDie Qualitäts
Page 4 and 5: Series 400 - 8000: 2 Product Lines
Page 6 and 7: GMN Sprag-Type-ClutchesBasic Inform
Page 8 and 9: Transmittable Torque based on wall
Page 12 and 13: Freewheel-Clutchas an insert elemen
Page 14 and 15: FE 400FE 400 ZFE 400 Z2Mounting spa
Page 16 and 17: FR 400FP 400FPD 400122734GMN Sprag-
Page 18 and 19: Please note also ourflyer Ball Bear
Page 20 and 21: GMN Sprag-Type-ClutchesTolerance Ta
Page 22 and 23: IntroductionMounting InstructionsSp
Page 24 and 25: Proper lubrication with only qualif
Page 26 and 27: Mounting Series 400 and Series 8000
Page 28: Sprag-TypeFreewheel-ClutchesPrintin

Sprag-Type Freewheel-Clutches

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