Precision grinding is used for materials with relatively small surfaces that require a high degree of flatness, a high degree of parallelism, or a superior surface finish. It is used for applications for requiring tolerances of up to +/- 0.0001” and can achieve surface finishes of around 10 RMS.

Different types of precision grinding

Some common abrasives for both horizontal spindle surface grinding and cylindrical grinding include aluminum oxide, zirconia alumina, and silicon carbide. Depending on the application, lubricants may be used to keep the high temperatures caused by the grinding process down.

In vertical grinding, the workpiece is held upright in a rotary chuck with the grinding spindle overhead. This configuration can improve roundness, facilitate single-setup processing and prolong the life of the machine. Loading and unloading may gets easier, too. Workpieces with relatively large diameters and short lengths benefit the most from vertical grinding.