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

入力された荷重を示します。

Radial displacement/Axial displacement

ステップ荷重が負荷したときの変位量を示します。

本メニューで計算できる軸受の品種とそれぞれの計算式は次のとおりです。

Type of bearing		Radial displacement δr（mm)	Axial displacement δa（mm)	Max. rolling element load Qmax(N)
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)