SAMICK
Technical Information
Home > Technical Information > Self-Aligning Linear Bushing > Examples of Calculation and Choosing a proper SUPERBALL
> Structure and Special   Feature
> Load Rating and Service   Life Linear Motion System
> Factors that affect travel   life
> Load Considertion
> Mean Effective Load at   Varying Load
> SAMICK Support Rail Unit
> SAMICK LM Shaft
> SAMICK Shaft Support
> Self-Aligning Linear   Bushing
> SAMICK LINEAR BUSHING
> GUIDE MASTER
> Referance Data
 

The Maximum applied load and the travel kife are the most imortant factor choosing a proper Linear Bushing size. Below are the sample calculation of the expecting travel life and choosing of proper Linear Bushing size.
Since, basic dynamic load rating is based on travel life of 50km and assuming all other factors as 1.0, you can choose the Linear Bushing size that you can expected Travel life. Let's try LMEW20UU with the above working conditions.
Let's assume our designed travel life is 15,000 hours,
Therefore, the poper SUPERBALL for above condition is LMES25UU which has 3800N as the Basic dynamic load rating.