Posted by David Robinson on November 12, 2000 at 06:07:26:
In Reply to: Re: WE NEED FORMULA FOR HELICAL GEAR HOBBING posted by D.RAVI CHANDRAN on August 28, 2000 at 07:20:06:
If my memory serves me well, I think you may be looking for:
(9*Sin(HA))/(Z*Mod*Pi)
To confirm, use this to cut a blank and inspect the lead. If this is incorrect, any disrepancy can be recalculated.