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Changzhou Suma Precision Machinery Co., Ltd.

Backstop, Overrunning Clutch, One Way Clutch manufacturer / supplier in China, offering Integrated Freewheels Fxrt Backstop with Sprag Lift-off X, Nfs200 One Way Indexing Clutch Roller Type, Complete Freewheel/Overrunning Clutch with Shaft Coupling (FR...300CA) and so on.

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Supplier Homepage Product cam clutch (backstop clutch) Integrated Freewheels Fxrt Backstop with Sprag Lift-off X

Integrated Freewheels Fxrt Backstop with Sprag Lift-off X

FOB Price: US $950 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $950/ Piece
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Port: Shanghai, China
Production Capacity: 10000PCS/Month
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: FXRT 120 - 50
  • Certification: ISO9001: 2000
  • Model: Fxrt 120 - 50
  • Outer Diameter: 360mm
  • Width: 70mm
  • Precision: P6
  • Port: Shanghai;Ningbo
  • Trademark: SUMA or OEM
  • Specification: P6
  • HS Code: 84836000
  • Type: Motorcycle Transmissions
  • Material: Gcr15
  • Inner Diameter: 60-95mm
  • Weight: 87kg
  • Sprag Lift-off at Inner Ring Speed: 320r/Min
  • OEM: Accept
  • Delivery: 10-15days
  • Transport Package: Single Box or as Your Requirements
  • Origin: Changzhou, Jiangsu, China
Product Description
Integrated Freewheels FXRV and FXRT
for bolting to the face
with sprag lift-off X and torque limiting
Integrated Freewheels FXRV and FXRT are sprag freewheels without bearing support and with sprag lift-off X. They consist of the Integrated Freewheels FXM with additional torque limiter. The sprag lift-off X ensures a wear-free freewheeling operation when the inner ring rotates at high speed. The freewheels FXRV and FXRT are used as:
for continuous conveyor installations with multiple drives in which each drive is equipped with
its own backstop. In such continuous conveyor installations with multiple drives it is important
to consider the problem of the unequal distribution of backdriving torque to the individual
drives and backstops. As soon as the installation comes to a standstill, the entire backdriving torque is applied primarily to a single backstop, due to differences in the play and elasticity of
the drives involved. In installations equipped with backstops without torque limiters, the individual gearboxes and the corresponding backstops must be designed to accommodate
the entire backdriving torque of the conveyor installation in order to ensure safety.
The problem of the unequal distribution of backdriving torque is solved by using backstops
FXRV and FXRT with torque limiting. The torque limiter which is built into the backstop slips
temporarily when the specified torque is exceeded until the other backstops engage in succession. In this way, the entire backdriving torque of the conveyor installation is distributed
to the individual gearboxes and backstops. Furthermore, dynamic peak torques which occur during the locking process are reduced, thereby protecting the gearboxes against damaging
peak torques. For this reason the use of backstops FXRV and FXRT with torque limiting
in continuous conveyor installations with multiple drives enables the application of gearboxes
with smaller dimensions.
1. Protection of gearboxes from overload by unequal load distribution in multiple drives
2.Protection of gearboxes from dynamic peak torques during the locking process
3. Smaller gearboxes can be used without negatively effecting the safety
4.Protection of the backstops, as dynamic peak torques are reduced by temporarly slipping
Freewheel SizeTypeSlipping torque
Sprag lift-off at inner
ring speed min-1
Max. speed
Inner ring  freewheels min-1
mmmmBore d
mm       mm
mmmmmax. mmA
min. mmU***
max. mm
FXRT  85 - 40MX1 4004306 00045506065  653301486295M 1237296012728011030816521543660
FXRT 100 - 50MX2 3004004 50045505560707580*3501596311M 1239317013430012532818024038666
FXRT 120 - 50MX3 4003204 000606570758095954001596360M 1636317013434014537320026038687
FXRT 140 - 50MX4 5003203 0006590100110  1104301636386M 16363170134375165403220280506104
FXRT 170 - 63MX9 0002502 700708590100120 1305001886460M 16434080156425196473250340386166
FXRT 200 - 63MX12 5002402 100130     1555551886516M 16494080156495226528275390386209
FXRT 240 - 63LX21 2002203 000      1857102108630M 205050901706302906703554554512355
FXRT 260 - 63LX30 0002102 500      2057502238670M 2050501051836703107103755004012418
FXRT 290 - 70LX42 5002002 500      2308502438755M 2452501051907303358004055604812574
FXRT 310 - 96LX53 0001952 100      24090029310800M 2463631202407753558504356006912805

The Integrated Freewheels FXRT are supplied with a set slipping torque MR of the torque
limiter. The static backdriving torque ML of the installation (also in the case of an overload)
must under no circumstances achieve the sum of the slipping torques MR of the provided
Integrated Freewheels. The slipping torques MR specified in the table are maximum values;
lower values can be set.
The Integrated Freewheels FXRT are without bearing support, therefore it must be ensured
that the run out (T.I.R.) between the pilot diameter R and the shaft diameter d does not
exceed the value 0,25 mm. Dimension C applies for the Integrated Freewheel. The centering depth of the customer attachment part must be at least C + 0,2 mm. The tolerance of the pilot diameter R of the attachment part must be ISO H7. The tolerance of the shaft must be ISO h6 or j6.
Release function
The finely controllable release function consists basically of three special screws (2) that are located in the spring pocket (1) and the safety tabs (3). To release the backstop, first of all the
special screws have to be unscrewed slightly. Then the cylinder screws (4) and the safety tabs
have to be removed. The special screws can then be tightened, whereupon, with the aid of
the belleville spring set (5) the release procedure is finely initiated.
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