Source for timing pulleys
 

Hey guys, I just got my MotionKing steppers in today, and was trying to find a reasonable source for pulleys to build my belt reduction. The MK motors have a 14mm shaft. I want to go either 3:1 or 4:1 on reduction (still debating). After searching for some time (all afternoon), I have struck out in finding 14mm bore timing pulleys. Any suggestions for a US source for these critters?

I gave up too and ended up using 10mm i/d pulleys and resigning myself to drilling them out.

John

I used 15 tooth XL and bore it for 14mm shaft, my motor had a keyway so I made a passage in pulley 2.5mm for the key on the mill also. and it did not break.
It works ok.

Check out this site

https://sdp-si.com/eStore/

Takes some digin around but here are some numbers ( for 4:1 belt drive). They will get you started.

the 72 tooth pulley is part number A6A3-72NF03716
the 18 tooth pulley is part number A6A3-18H3716
the belt is a 200xl with Kevlar reinforcement part number A6B3-080037

Thanks guys, it looks like I'll follow suit and bore the hole out to fit.

Mike, I appreciate the link and part #'s. I looked on thier site yesterday, but didn't see any 14mm bores, so I didn't pursue things very deeply. I'll order these this week, and get my reductions built.