Gold Member Since 2014
Audited Supplier
Changzhou Suma Precision Machinery Co., Ltd.

Sprag Freewheel, Backstop, Overrunning Clutch manufacturer / supplier in China, offering Internal Freewheels Zz /Sprag Clutch with Ball Bearing Properties, Asnu20 Roller Type Freewheel Overrunning Clutch, 200 Series Backstop One Way Clutch and so on.

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Supplier Homepage Product overrunning clutch (sprag clutch) Internal Freewheels Zz /Sprag Clutch with Ball Bearing Properties

Internal Freewheels Zz /Sprag Clutch with Ball Bearing Properties

FOB Price: US $5 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $5/ 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.: ZZ
  • Type: Sprag
  • Nominal Torque: 1.9-240.7lb-FT
  • Weight: 0.02-0.50kg
  • Stock: Rich
  • Trademark: SUMA or OEM
  • Specification: P6
  • HS Code: 84826000
  • Model: Zz
  • Maximum Torque: 3.8-481.4lb-FT
  • Maximum Speed: 3000-15000rpm
  • OEM: Accept
  • Export: Worldwide
  • Transport Package: Single Box or as Your Requirements
  • Origin: Changzhou, Jiangsu, China
Product Description
Internal Freewheels Zz /Sprag Clutch with Ball Bearing Properties
Internal Freewheels ZZ  are sprag freewheels with bearing support and ball bearing properties. The freewheels are supplied grease-filled for normal operating conditions.
The freewheel is assembled into the customer housing, allowing a compact, space-saving solution. The freewheels ZZ  are used as:
2.Overrunning Clutches
3.Indexing Freewheels
Maximum torques up to 480 lb-ft/650 Nm. The torque is transmitted on the inner ring and/or
on the outer ring by press fit or keyway connection. Bores up to 1.575 inch/40 mm.
The following series are available:
SizeTorque transmission on
Outer ring by            inner ring by
Keyway    press fit      keyway     press fit
The Internal Freewheels ZZ of the sizes ZZ 6201 to ZZ 6207 have the same dimensions as the respective ball bearings of series 62. The series ZZ  2RS and ZZ P2RS have 2RS
Application example
Two Internal Freewheels ZZ 6206 as indexing freewheels in the drive of the metering roller of a seed spreader. The freewheels are built in an infinitely variable oil bath gearbox. Two cam disks that are off set by 180° are arranged on the gearbox shaft. By means of torque arms, these drive the outer rings of the two adjacent Internal Freewheels, which then gradually turn the metering shaft. The infinite speed settings of the gearbox's drive shaft are executed by means of the respective pivoting of the roller support plate, so that the torque arms can execute lifts of differing amounts.Internal Freewheels Zz /Sprag Clutch with Ball Bearing Properties
Freewheel SizeMaximum torque MNNominal torque MNMaximum speedLoad rating of bearing supportBoredBDKWeight
Dynamic CstatiC0

The torque is transmitted on the inner ring and outer ring by press fit. In order to transmit the torques specified in the table, the outer ring must be installed in a housing with an external diameter K. The housing should be 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 D must be ISO N6 and the tolerance of the shaft must be ISO n6.
The permissible operating temperature of the freewheel is - 40°F to +175°F.
The freewheels are supplied grease-filled for normal operating conditions. However, the
freewheels can also be connected to the customer ´s oil lubrication system; this is particularly recommended in the case of higher speeds.
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