Five steps to learn to choose the size of linear bearings

Usually we in the choice of linear bearings is based on what requirements to choose, is according to the size of the previous specifications? But when there are different models, different brands change the law is still the same? Today we give five examples to teach you to learn to choose the size, as shown below:

1. Determine the size parameters of linear bearings: In many cases, the inner hole size of linear bearings has been specifically limited by the structure of the machine or device. Regardless of whether the working life, static load safety factor and economy meet the requirements, the remaining dimensions and structural forms of linear bearings must be calculated before they are selected.

2. Static load linear bearing: Calculating the static load safety factor Fs helps to determine whether the selected linear bearing has sufficient rated static load. FS = CO/PO where FS static load safety factor, CO rated static load [KN],PO equivalent static load [KN] static load safety factor FS is the safety factor to prevent permanent deformation in the contact area of rolling parts.

3. Dynamic load linear bearings: The standard method for calculating dynamic load linear bearings specified in DIN ISO 281 is based on material fatigue failure (pits), and the life calculation formula is: l10 = L =(C/P)P [106 revolutions] where L10 = L nominal rated life [106 revolutions] C rated dynamic load [KN] P equivalent dynamic load [KN] P life index L10 is the nominal rated life converted from 1 million to unit [106 revolutions] C rated dynamic load [KN] P life index L10 is the nominal rated life converted from 1 million to unit.

4. Variable load and variable speed: If the value and speed of the dynamic load of the linear bearing change with time, then there must be corresponding consideration when calculating the equivalent load. Continuous load and speed curves? should be replaced by piecewise approximations.

5. Small load of linear bearing: too small load plus insufficient lubrication will cause the rolling body to slip and cause damage to the linear bearing. The smaller load factor of the cage imported bearing is P/C = 0.02, while the smaller load factor of the full-load linear bearing is P/C = 0.04(P is the equivalent dynamic load, C is the rated dynamic load).