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One-way Bearing

One-way bearings are a type of bearing that can rotate freely in one direction but is locked in the other direction. One-way bearings are also called overrunning clutches, but they are named according to different industries and functions. The metal shell of a one-way bearing contains many rollers, needles or balls, and the shape of its rolling seat (hole) makes it only able to roll in one direction, and will generate great resistance in the other direction (the so-called "one-way").

Product details

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Model number Basic size Basic load rating Rated speed
Dynamic state Static Reference speed Limiting speed
d [mm] D [mm] B [mm] C [kN] C₀ [kN] [r/min] [r/min]
AS80
80 140 26
AS60
60 110 22
AS55
55 100 21
AS50
50 90 20
AS45
45 85 19
AS40
40 80 18
AS35
35 72 17
AS30
30 62 16
AS25
25 52 15
AS20
20 47 14
AS15
15 3 5 11
AS12
12 32 10
Model number Basic size Basic load rating Rated speed
Dynamic state Static Reference speed Limiting speed
d [in] D [in] B [in] C [Ibf] C₀ [Ibf] [r/min] [r/min]
AS80
AS60
AS55
AS50
AS45
AS40
AS35
AS30
AS25
AS20
AS15
AS12

Product Introduction

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Classification of one-way bearings


Classification by structure:

(1) Wedge-type one-way bearing: uses the friction between the wedge and the inner and outer rings to transmit torque, suitable for higher speeds and larger loads.

(2) Roller-type one-way bearing: relies on rollers to roll between the inner and outer rings to transmit torque, suitable for lower speeds and medium loads.

(3) Spring-type one-way bearing: uses spring leaves to generate prestress to make the inner and outer rings tightly connected, suitable for low speeds and small loads.

Classification by use:

(1) General one-way bearing: Suitable for power transmission and control in general mechanical transmission systems.

(2) Special one-way bearings: One-way bearings designed for specific mechanical equipment or working conditions, such as one-way bearings in automobile clutches.


One-way bearing model selection guide


When selecting a one-way bearing model, the following aspects should be considered comprehensively:


1. Working speed and load: Select a one-way bearing with a suitable structure type and load capacity according to the actual application scenario.

2. Installation space and size restrictions: Select a one-way bearing of corresponding size according to the installation space of the mechanical equipment or system.

3. Working environment and lubrication conditions: Consider factors such as temperature, humidity, and corrosion, select a one-way bearing that is suitable for harsh environments, and pay attention to the lubrication method and lubricant selection.