I just ran out back to look at my Clausing 4902. It has 27 tpi right on the QCGB. Also 22,23,24,26,28, then jumps to 32. No 25, no 30.?
OTOH, I looked up the Atlas threading supplement and a 10F will do 25,27,and 30. Atlas for the win! But you shouldn't need a 32T gear to do this.?
