What is the friction coefficient of rolling bearings?
One of the important properties of rolling bearings is that they can reduce friction. Under normal operating conditions, rolling bearings have a smaller friction coefficient than sliding bearings, especially low starting friction. The friction inner diameter of rolling bearing is the benchmark, which can be expressed by the following formula:
μ=2M/Pd
μ:Coefficient of friction
Μ：Friction torque N.mm（kgf.fmm）
P: load N(kgf)
d: Bearing inner diameter mm
In addition to the structure of the bearing, the dynamic friction coefficient of rolling bearings also varies due to load, lubrication, speed and other factors. Under normal operating conditions, the friction coefficient of various bearings can refer to the values shown in the table below.
Bearing type Friction coefficient | μ*10-3 |
Deep groove ball bearing | 1.0~1.5 |
Centripetal thrust ball bearing | 1.2~1.8 |
Self-aligning ball bearing | 0.8~1.2 |
Needle bearing | 2.0~3.0 |
Tapered roller bearing | 1.7~2.5 |
Self-aligning roller bearing | 2.0~2.5 |
Thrust ball bearing | 1.0~1.5 |
Thrust roller bearing | 2.0~3.0 |
Wafangdian Jinrui Bearing Co., Ltd. mainly produces spherical roller bearings, cylindrical roller bearings, tapered roller bearings, bearing housings, deep groove ball bearings, etc. The company's products are currently widely used in electric power, coal, cement, textile, steel, metallurgy and other industries, and are well received by users. Want to learn more about bearings? Then come to consult and enlighten us, our products are rich in variety to meet your needs as much as possible.
