I want to learn how to use technical calculation tool for elastic displacement.

This page explains techincal calculation tool provided by JTEKT.

Please click below if you want to use technical calculation tool.

Technical calculation for elastic displacement

Technical calculation for elastic displacement

The elastic displacement of a bearing that occurs when a radial load or axial load is applied is calculated as follows.

Operating conditions

Type of load

Select radial load or axial load.

Loading condition

Bearing displacements for a maximum number of 10 loads are calculated.
Enter the minimum load, maximum load, and load increment.
Enter the load per a bearing.For a double-row bearing, the program will automatically allocate the load to each row.

Calculation results

Load increment


Radial displacement/Axial displacement



Type of bearing Radial displacement
Axial displacement
Max. rolling element load
Ball bearing Deep groove ball bearing
Angular contact ball bearing
(α>25°) 1) For radial load

2) For axial load
Self-aligning ball bearing
Thrust ball bearing
Roller bearing Cylindrical roller bearing
Needle roller bearing
1) For radial load
・Cylindrical/needle/tapered roller bearings

・Spherical roller bearing

2) For axial load
Tapered roller bearing
Spherical roller bearing
Spherical thrust roller bearing
Needle roller thrust bearing

1) Equations in this table are approximate based on the assumption that the bearing internal clearance is zero.

2) For deep groove ball bearings and angular contact ball bearings with a nominal contact angle of 25or less, only an equation for displacement due to radial load is available.

3) Symbols and definitions

Fr,Fa radial load, axial load (per single row) (N)
Dw rolling element diameter (mm)
Z number of rolling elements
α nominal contact angle (°)
Lwr effective contact length of roller (mm)

For those who have trouble slecting bearings

If you are not sure what bearing to choose,if you want to change to a more suitable bearing,Please contact JTEKT.

If you need support, please click here.

If you need more information

Please contact us by mail

Contact Us