Jiangsu, China
Business Type:
Manufacturer/Factory & Trading Company
Year of Establishment:
Plant Area:
1500.0 square meters
Management System Certification:
ISO 9001, ISO 9000
Average Lead Time:
Peak season lead time: within 15 workday
Off season lead time: within 15 workday
OEM/ODM Service
Sample Available

Backstop, Overrunning Clutch, One Way Clutch manufacturer / supplier in China, offering Fxn Internal Freewheels for Press Fit on The Outer Ring, Cam Clutch Sprag Type One Way Bearing Cka 4090 Ck-A4090, Gez12es-Gez152es High Misalignment Spherical Plain Radial Bearing and so on.

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Supplier Homepage Products overrunning clutch (sprag clutch) Fxn Internal Freewheels for Press Fit on The Outer Ring

Fxn Internal Freewheels for Press Fit on The Outer Ring

Get Latest Price
Min. Order / Reference FOB Price
1 Piece US $10-1,000/ Piece
Port: Shanghai, China
Production Capacity: 10000PCS/Month
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
Type: Motorcycle Transmissions
Certification: ISO9001: 2000
Material: Gcr15
Model: Fxn38 - 17/70
Inner Diameter: 25mm
Outer Diameter: 70mm

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Basic Info

Model NO.: FXN38 - 17/70
Weight: 0.4kg
Width: 24mm
Oen: Accpet
Precision: P6
OEM: Accept
Port: Shanghai;Ningbo
Delivery: 10-15days
Trademark: SUMA or OEM
Transport Package: Single Box or as Your Requirements
Specification: P6
Origin: Changzhou, Jiangsu, China
HS Code: 84836000

Product Description

Internal Freewheels FXN
for press fit on the outer ring
with sprag lift-off X
Internal Freewheels FXN are sprag freewheels without bearing support and with sprag lift-off
X. The sprag lift-off X ensures a wear-free free - wheeling operation when the inner ring rotates
at high speed. The outer ring is pressed into the customer hous ing. This makes compact, space-saving fitting solutions possible. The freewheels FXN are used as:
 Overrunning Clutches
for applications with high speed freewheeling operation and when used as an overrunning
clutch with low speed driving operation. Nominal torques up to 20 500 Nm. The torque is
transmitted on the outer ring by press fit. Bores up to 130 mm. Many standard bores are
Sprag lift-off X
Internal Freewheels FXN are equipped with sprag lift-off X. The sprag lift-off X is used for
backstops and overrunning clutches, provided that in freewheeling operation the inner ring is
rotating at high speed and providing with overrunning clutches that the driving operation
is conducted at low speed. In freewheeling operation, the centrifugal force FC causes the
sprag to lift off from the outer track. In this operating state, the freewheel works wear-free,
i.e. with unlimited service life.
The Figure shows a freewheel with sprag liftoff X in freewheeling operation. The sprags,
which are supported in a cage connected with the inner ring, rotate with the inner ring. The
centrifugal force FC that is applied in the center of gravity S of the sprag turns the sprag counterclockwise and rests against the support ring of the cage. This results in the gap a between the sprag and the outer track; the freewheel works with out contact. If the inner ring speed decreases to such an extent that the effect of the centrifugal force on the sprag is less than that of the spring force FF , the sprag again rests on the outer ring and the freewheel is ready to lock. If used as an overrunning clutch, the driving speed must not exceed 40% of the lift-off speed.
Freewheel sizemmmmBore dmmmmmax. mmBD mmFJK min. mmLWeight
mm mm    
FXN31 - 17/6020*     20*2560 P6553185240,3
FXN31 - 17/6220*     20*2562 P6553185240,4
FXN38 - 17/7025*     25*2570 P6623890240,4
FXN46 - 25/8025     303580 P6704695350,8
FXN51 - 25/85253035   363585 P67551105350,8
FXN56 - 25/9035     403590 P68056110350,9
FXN61 - 19/95303540   45*2695 P68561120250,8
FXN61 - 19/106303540   45*25106 H78561120251,2
FXN66 - 25/100354045   48*30100 P69066132351,1
FXN66 - 25/110354045   48*40110 P69066132351,8
FXN76 - 25/1154555    60*40115 P610076140351,7
FXN76 - 25/1204555    60*32120 J610076140351,8
FXN86 - 25/1254045506065 70*40125 P611086150402,3
FXN86 - 25/1304045506065 70*40130 P611086150402,6
FXN 101 - 25/1405570    7545140 P6125101175503,1
FXN 101 - 25/14970     7562149 H6125101175624,2
FXN 101 - 25/1505570    7545150 P6125101175503,6
FXN 85 - 40/14045506065  6545140 P612585175603,2
FXN 85 - 40/15045506065  6545150 P612585175604,2
FXN 100 - 40/1604550556070757550160 P6140100190605,1
FXN 105 - 50/16580     8062165 P6145105195625,8
FXN 120 - 50/1986065707580959570198 H6160120210708,6
FXN 140 - 50/2156590100110  11069215 J61801402457014,0
FXN 170 - 63/2587085100120  13080258 H62101702908021,0
Application example
Internal Freewheel FXN 38 - 17/70 NX as a backstop, arranged in a housing adapter to attach to an electric motor. The thin outer ring that is pressed into the housing enables a space-efficient fitting solution. Due to the high shaft speeds in normal operation (freewheeling
operation), the sprag lift-off X ensures a contactless and hence wear-free continuous oper -ation.
Application example
Internal Freewheel FXN 66 - 25/100 NX as an overrunning clutch in the creep drive of a textile
machine. The freewheel installation is compactly solved by means of the thin outer ring
that is pressed into the worm wheel. During setup, the machine is driven by the worm gear and
the freewheel that is working in driving operation. In normal operation (freewheeling oper ation), the inner ring that is located on the high speed main drive shaft overruns and automatically disengages the creep drive. With the high overrunning speed of the inner ring, the type with sprag lift-off X is used; the sprags work in freewheeling operation without contact and hence are wear-free.
Application example
Internal Freewheel FXN 85 - 40/140 MX as a backstop fitted to the end of the first inter mediate
shaft of a spur gearbox in the drive of an inclined conveyor belt. In the case of a motor
stop the conveyor belt must be held securely so that the conveyor goods do not pull the belt
backwards and possibly cause serious damage. Due to the high shaft speeds in normal oper ation (free wheeling operation), the sprag lift-off X ensures a contactless and hence wear-free
continuous operation.
Internal Freewheels FXN are without bearing support. Concentric alignment of inner and
outer ring must be provided by the customer. The permissible run out (T.I.R.) must be observed. The torque is transmitted on the outer ring by press fit. In order to transmit the torques specified in the table, the outer ring must be accommodated in a housing with an external diameter K. The housing is made of steel or grey cast iron in minimum quality GG-20. When using other housing materials or smaller external diameters, we urge you to contact us regarding the transmissible torque. The tolerance of the housing bore is specified in the table under dimension D. The tolerance of the shaft must be ISO h6 or j6.
At speeds in excess of the sprag lift-off speed, no special lubrication is required; the freewheel
functions maintenance-free. When operating below the sprag lift-off speed, an oil lubrication of the specified quality must be provided.
Example for ordering
Freewheel size FXN 61 - 19/95, type with sprag
lift-off X and 35 mm bore:
? FXN 61-19/95 NX, d = 35 mm

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