Hobbing Worm Wheel - Need Help

[LMMasterMariner]

Thanks Olderdan.

I also found some info in 'Handbook of Machining and Metalworking Calculations' and 'Machinery's Handbook 29th Edition (2012)' which I have in my pdf collection.
Yes, my intention is to use free hobbing method.
Already made hob from s.s. 304 24 mm dia hex rod. At the same time on the same rod made worm.
Here is picture of that and also picture (found on the web) of what hob should be when I finish it.

Best regards
LMMasterMariner