60 tooth, helical or spur gear with matching worm.
OD must be 4" (100mm) or larger (if slightly smaller, like
between 3" to 4" (75mm to 100mm) I'll consider).
I need to bore a 2.5" (64mm) hole in the center of this gear
so smaller OD gears won't work.
Plastic or alum is preferred, but will consider any metal
(brass, iron, etc).
I'd also like any leads on gear suppliers (small quantities)
if you know this. :-)