Diametrical pitch of gears.

[Half Nut]

Hello all, Can someone give me information on the diametrical pitch of the gears in the Craftsman Commercial gearbox, I know most of the gears are 16 pitch but some of the gears have a different pitch, I think they are 20 diametrical pitch 14 degree pressure angle but not sure, I need to buy a set of cutters. Any help would be greatly appreciated, Thanks John.

 

[RJSakowski]

If you measure the diameter of the gear and count the teeth, the D.P. is the number of teeth plus 2 divided by the O.D.

 

[Half Nut]

Thanks, I know how to figure out diametrical pitch, I don't want to take the gearbox off to measure a gear. I just thought someone might know offhand. Thanks,John.