Posted by Frank on February 03, 2014 at 16:15:44:
According to the manual, the 75A and 715A are for external and herringbone gears and use 3-1/2 inch helical cutters with a 1-1/4 inch hole. When arranged with straight guide for spur gears, No 75A and 715A use 4 inch cutters only with 1-1/4 bore. Why cant you use a 3 inch diameter cutter for spur gears on the 75A machine? Just wondering