What's the difference between cross roller guides and linear guideways?

Cross roller guides increases the effective contact length of the roller by adopting the unique roller holding mechanism of the R-type roller keeper.It shortens the spacing of the roller body. 

Through the combination design of roller retainer and special V-type track, cross roller guideways high-precision surface undergoes special heat treatment, which is a high rigidity, rigid precision and compact finite linear motion system. 

Ball guide (VB type) is a product that replaces the roller with a steel ball that crosses the roller rail.

The installation height of the cross roller guide is lower, because it is a combination of parallel installation of the two-pay guide rail, which makes the platform of the cross roller guide better than the linear rail, and the tipping torque is higher than the linear rail. 

Therefore, the stability of the operating machine is much higher than that of the linear rail.

However, the effective travel of the cross roller rail is limited, it is better to splice the linear rail indefinitely, in the limited travel time, the reciprocating linear motion accuracy of the cross roller guide is much higher than the straight rail SP level. Therefore, it can be said that the accuracy of the cross rail is much higher than that of the linear rail.

It is widely used in OA machines and their surrounding machines, various detectors, printing substrate opener and other precision machines, or optical testers, optical workbench, operating mechanisms, X-ray devices and other sliding seat parts.

Q. How do I choose the length of the V-track and the length of the retainer by designing a larger stroke?

A.  (L0 - R) x 2 - Larger stroke

L0: Length of V-rail R: Length of retainer

 https://www.autolinearmotion.com/cross-roller-guides.html