The radial internal clearance of the idler roller bearing

Not all the idler roller bearings need small radial internal clearance, we must choose proper clearance according to different conditions. In the international standard, the radial internal clearances of the idler roller bearing are classified as: 2 group, 0 group, 3 group, 4 group and 5 group, and the clearances are from the small value to the big, 0 group is the standard clearance.

The basic radial internal clearances are suitable for common working condition with regular working temperature. But in special conditions such as high temperature, high running speed, low noise and low friction, we should choose the idler roller bearing with big radial internal clearance. And we should choose that of the small clearance which is used in the principle axis with high precision and in the machine tool.

As for the idler roller bearing, we´d better choose small radial internal clearance. And for the separated type idler roller bearing, we don´t need to use clearance. Finally, the working clearance after the installation of the idler roller bearing must be smaller than that of before the installation, that is because the idler roller bearing suffers loads while its rotation, and the idler roller bearing would distort more or less.

Sincerely,

Written by Flavio.Xie, China,
Shandong XinKaite Bearing Co. Ltd.,

My Email:03@xinkaite.com