Gear hobs with protuberance for involute gear froms

Gear hobs with protuberance for involute gear froms

for straight spur gears with straight teeth and helical teeth to module with protuberance

for rough hobbing prior to grinding or skive hobbing 

20° pressure angle

Conventional dimensions of gear hobs with protuberance for involute gear forms as following:

Please contact us for more details on pre-grinding gear hobs when you have some new needing.