If you watched the whole video you would have seen they roughed the teeth first Then machines the surfaces where they were bolted together Why ?? Because the joint opens up about 15cm when the unbolt them Just then they start hobbing Hobs with special made carbide inserts I have insert on my desk About 15x15x100mmThis sort of ignores the dynamics of gear hobbing tho. How do you control speed with a stepper ? The process of hobbing teeth is like a very interrupted cut at slow speeds. Maybe at 32DP this won't be a problem but with bigger teeth, the hob motor has to be actively controlled. Mechanical h
Hard to tell from the glitzy video but doesn't look like hobbing at all .
Then they place the pinion in a temperary set up to see how it bleus Like you see it bleus not all the way The pinion is ground covex to prevent exces side load