Posted by BillS on May 13, 2016 at 14:30:20:
In Reply to: baber colmen type t 16-11 differential ratio posted by henry on May 11, 2016 at 09:46:51:
Hi Henry,
There are two 16-11 shown in the FAQ table. Only one has a differential, and it is type "B".
So the formula is:
2.38732415 x SIN(HA) x NDP
differential Ratio = --------------------------------------
(TEETH to cut) x (Hob Starts)
Index is displayed as 7.5 so that will help you decide if this is the right machine.