Originally posted by dcshooter Ah, so the one directly attached to the screw drive shaft.
After long search on the internet I found this page:
Unlimited Drive Systems -
Brass gear or other material (aluminum, steel, POM). The description of the spur gear should be 13 T, MOD 0.3, bore 2,0 mm, (outside or tip diameter 4,5 mm), but Unlimited Drive System has just bore 1.5 mm. The hole can be reworked. The price for 1-4 units is 131 euro. WOW! +shipping and +taxes
If I understand correctly, 1 unit contains 10 gears. So minimum 13 euro per gear +shipping and +taxes.
Another possible decision could be plastic gear.
Here is the link:
Pojezdy.EU - Odvalované ?elní kolo z Delrinu - 13 zub?, modul 0,3mm na osu 2mm, ?í?e 2mm
According to description, measurements are the same, just bore is 2,0 mm (actually 1,95 mm). The price with shippment included is about 3-4 euros.
Type of plastic used - Delrin.