In my previous article about how to choose diamonds’ grit, I said some main points you should consider. There are still many other points which are also important.

1) The nature of the workpiece:

If the workpiece is of high hardness, coarser grit diamonds should be chosen to reduce the heat generated in the cutting/grinding process and to improve the cooling conditions.

If the workpiece is thin, coarser grit should be chosen, for thin workpieces are subject to being deformed by the heat.

If the workpiece has good scalability, coarser grit can prevent or reduce the blocks on diamond tool’s surface.

2) The contact area between the diamond tool and the workpiece: When the contact area is broad, coarser grit should be chosen to reduce friction and heat.

3) In profile grinding, finer grit should be chosen to keep the form of the diamond tool’s working part.

4) The use volume of the diamond tool and operation conditions should also be taken into account.

The diamond grit is not the only factor to influence the processing quality and efficiency. The roughness of the workpiece’s surface is under the combined effects of diamond grit, volume of grinding, and especially the grinding depth, operation skills and the performance of the grinding machine.