Posted by MikeS on September 15, 2008 at 19:16:53:
In Reply to: Re: helical posted by BillS on September 11, 2008 at 17:32:29:
Bill,
Hob not tracking. I checked with Bourn and Koch, they said doubling the differential is not necessary on a dble start hob, but the index must be doubled. Are these correct?
30deg rh gear LH dbl thd hob 7 DP 20PA
transvers DP 6.062 Pd 6.5984823
Lead 35.90196077 Diff 7.5/lead = .208902239
43/62 x 25/83 diff gears