In order to guarantee satisfactory performance, needle/angle contact ball bearing like all ball bearings and roller bearings, must always bear the role of radial and axial load of certain minimum, especially if they want to high-speed operation or withstand high acceleration or load the speed of change in direction. In these conditions, rolling element and maintains a force of friction and lubricant, may be on the bearing the configuration of the rolling conditions play a harmful effect, and may cause rolling element and groove found between destructive sliding.

Plus needle bearing in mind on the need for minimum radical load can be estimated using the following formula

Frm = 0.02 C

Angle contact ball bearing of the necessary minimum axial load can use the following formula :

Type of

Frm = minimum radial load, thousands of Newton

Fam = minimum axial load, thousands of Newton

C = basic rated move load (see product table), Newton

C0 = basic rated static load (see product table), Newton

Dm = bearing average diameter

= 0, 5 (d + d), mm

N = rotational speed,rev/min

Cold start or lubricant viscosity is very high, even demanding loads. Weigh bearing support with the external force components is generally more than the necessary minimum load. If this is not the case, must give the needle roller/angular contact ball bearings impose additional radial and axial load.