1" Bore Timing Pulleys

[AdamHeard]

Originally Posted by Bryce2471

I'm making the assumption that because you are making a swerve, you have some sort of CNC milling ability. When we made ours, we bought pulley stock, cut it on the band saw, faced it, and drilled a small center whole in the lathe. Then we put it in the mill, and put the zero on the small whole with a center finder. We then ran a program that lightened the pulley and opened the 1" bore.

It's a bit of a long process, but we only have a table top lathe as well.

For 5mm pitch and above pulleys it's actually a big enough tooth to comfortably cut on a mill.

So for a pulley where you might be doing a lot of machining. Pocketing, mounting holes, custom bore, etc... it's actually easier for a shop to make the entire pulley (versus precisely zeroing on existing geometry).

We found a 2.5mm cutter is about the biggest cutter you can fit in 5mm pitch teeth. The OD of the pulley was roughed with a fairly large cutter, the teeth were roughed with a 3/16 or 5/32 and then finished with the 2.5mm. It wasn't crazy runtime, a few minutes per pulley iirc.