Helical Gear Hob Runout
Helical Gear Hob Runout
(OP)
I have a integral helical pinion that has a larger bearing diameter behind it. I can't find how to calculate how much length beyond my effective tooth length the cutter will need. I would like to minimize/eliminate the hob cutting into the bearing diameter and space is a concern. Does anybody know how to calculate this?
Thanks for any help.
Stuart Kinzel
Thanks for any help.
Stuart Kinzel





RE: Helical Gear Hob Runout
You could calculate it but the visualizing the geometry would be the most difficult problem.
RE: Helical Gear Hob Runout
I appreciate the help.
RE: Helical Gear Hob Runout
RE: Helical Gear Hob Runout
Slice the hob cylinder at the difference between the depth of cut and the larger diameter calculating a rectangle. Slice the large diameter cylinder with same the depth of cut creating another rectangle. Cant the hob rectangle at the hobbing angle. Intersect the 2 retangles and calculate the center line height from intersection points.
RE: Helical Gear Hob Runout
RE: Helical Gear Hob Runout
RE: Helical Gear Hob Runout
They sell tools and he does calculations like that every day.
I sure he would walk you through it.
scott@ashgear.com or 248 374 6155
-dwr