As the tool material is very hard, so generally can only use grinding to change its shape. Tool manufacturing, grinding common in the tool grinder are the following:

1. Grinder machine: grinding bits, end mills and other tools slot or back.

2. Polishing angle machine: grinding cone taper angle (or eccentric angle).

3. Repair transverse edge blade: the horizontal edge of the correction bit.

4. Manual universal tool grinder: grinding cylindrical, groove, back, top corner, horizontal edge, plane, rake and so on. Commonly used in a small number of complex shape tool.

5.CNC grinder: generally five-axis linkage, the function is determined by the software. Generally used for grinding a large number of high precision, but not complicated tools, such as drill bits, end mills, reamers and so on. The main suppliers of such grinders come from Germany, Switzerland, the United States, Australia and Japan.