Hi all,

Anybody out there tell me the difference between 141/2 and 20 degree pressure
angle?
Which is the best for a CNC gantry application?

Any good places to purchase on line, I've been around a dozen circles now and still can't find any.

Thanks in advance,

Mark

There is lots of previous posts on this here, 14 1/2 deg takes a larger load, 20 is a bit higher precision.Probabally 12 diametric pitch is the largest you may want to go with 20 about the smallest.
Most large commercial gantrys use 14 1/2. Boston gear offer a economical way to go, In Canada they are carried by Bearing Supply.
Al.