Posted by Don P on March 19, 2012 at 08:19:15:
In Reply to: Re: Hob speed posted by Tim on March 18, 2012 at 23:32:44:
If sfm = hob od x rpm x .262, then rpm is
sfm /( hob od x .262), so using a hob with 1.875 OD, and you want 70 sfm ,you would need approx
142 rpm.
In reply to the question about feeds for asp23 and carbide hobs,asp 23 is just a step above M2
very similar to M3 a little stronger but won't give you any great advantage (it's rated for 40 rc
as opposed to 35 rc for M2) Carbide on the other hand will allow you much greater sfm, all depending on the material you're trying to hob.
Machinery's Handbook has a large section on speeds and feeds.