The usual minimum size of gears we manufacture is from 1/4" in diameter and 120 D.P. to the maximum sizes listed below.

Gears/Worm/Others Maximum Diameter Maximum Pitch Maximum Face
Worm Gears (single or multiple starts, hobbed or fly cut)
60" to 130" 1 D.P. ---
Double Enveloping Worm Gears
Worms (thread milled)
20" 1 D.P. 100"
Worms (ground form)
12" 1 1/2 D.P. 17"