Centreless grinder uses NSK roller guides

The new Tschudin Cube 350 centreless grinding machine is using NSK’s RA series of low-friction, high-rigidity roller guides, which are helping to generate excellent levels of surface finish on machined workpieces.

Tschudin’s Cube 350 operates using the centreless cylindrical grinding method, where the drive design has a major impact on performance. Deploying linear drives in three axes (X-axis/control wheel adjustment, U-axis/grinding wheel adjustment and W-axis/workpiece adjustment) lays the foundation for obtaining both high productivity and flexibility. All drives must operate with micron-level accuracy. In the case of linear drives, this ethos also applies to the guide elements.

As a result, Tschudin has been using linear guides from NSK’s RA series in its centreless cylindrical grinding machines for many years. Thanks to their proven reliability, these high-performance products are now also demonstrating their worth in the Cube 350.

RA series roller guides offer high maximum load capacity and rigidity, thus delivering the traverse and repeat accuracy necessary in machine tools such as the Cube 350. Moreover, these capabilities are particularly desirable in applications that require superior surface finish.

The RA guideways run with high precision and low vibration, while at the same time meeting tough rigidity requirements. Rigidity is always a key factor in centreless grinding, where pressure and counter-pressure constantly exert on the workpiece, the grinding wheel and the regulating/control wheel. The RA guideways absorb these permanent forces to deliver traverse and repeat accuracy, as well as a prolonged service life.

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