The RA series of liner roller guides use rollers rather than balls which offer the best characteristics of the NSK linear Range. They are recommended for top end high machine performance offering high load capacity, high motion accuracy and high rigidity.
Super-high load capacity - Using the largest rollers possible combined with advanced analysis technology allows long life and high impact resistance.
Super-high rigidity - Using an optimal design for the shape of the rail and roller slides gives excellent rigidity.
Super-high motion accuracy - Designing optimal roller slide specifications through simulation of rolling element passage allows damping of vibrations.
Smooth motion - Retaining pieces between rollers restrains skewing thereby achieving smooth motion.
RA linear guides have four precision accuracy grades rated from P3 to P6, the lower the number the better the accuracy.
As standard the RA series rail is P6 which is suitable for most applications, however if super high accuracy is required then P5 to P3 can be specified. Due to the production techniques used by NSK in most applications standard products offer more than enough accuracy and preload.
NSK K1 lubrication units can be equipped to this series of linear guide. They are attached to both sides of the carriage and are made of a porous synthetic resign containing large volumes of lubricating oil that seeps out during the movement of the carriage on the rail. This has the benefit of reducing maintenance costs compared to a conventional lubricating system.