4-Row Heavy Load Linear Ball Guides SMA Series

The PMI SMA series linear guides consist of a precision-machined rail and a block with 4 rows of recirculating balls, designed for high load capacity and precision applications. With a 45° contact angle, the design allows uniform load distribution in all directions (radial, reverse radial, and lateral), providing high rigidity and smooth motion even under heavy working conditions.

The blocks use free balls without cages to maximize load capacity and structural stiffness. They feature lubrication channels for efficient grease distribution and easy maintenance. The SMA series is ideal for machine tools, robotics, and industrial equipment demanding superior mechanical performance and long service life.