Posted by BillS on November 28, 2016 at 01:46:17:
In Reply to: Machine constant posted by hemantkhera on November 25, 2016 at 12:01:45:
According to the FAQ page, the index constant is 12:N and the differential constant is:
0.313297132
from formula:
25 x NDP x sin(HA)
-----------------------
25.4 x PI x Hob Starts