CNC gear hobbing machine hob selection:

1. The selection of gear hob accuracy level should be based on the accuracy level or process requirements of the processed gear.

2. Selection of the number of gear hob heads. When precision machining with CNC gear hobbing machines, in order to improve machining accuracy, single head hobs should be selected. When rough machining, in order to improve machining efficiency, multi head hobs should be selected.

3. Selection of spiral direction for gear hobs. When hobbing straight cylindrical gears, right-handed hobs are generally used. When CNC hobbing machines are used to cut helical cylindrical gears, the spiral direction of the hob should be the same as the working direction. That is to say, right-hand helical gears should use right-hand hobs, and left-hand helical gears should use left-hand hobs.

4. Select according to process requirements. For example, for CNC gear hobbing machines that require gear grinding after gear hobbing, a torsional grinding roller must be selected. For those that require gear shaving after gear hobbing, a retained shaving roller should be selected.