Sprockets CNC Hub Adapter Between Sizes

[Sitherus]

I used my calipers to measure my hub/axle the part between the spokes where the CNC adapter fits. It measured 1.273 inches or 32.35mm I cant find any hub adapters that fit. What size would be right for me? I need to use to 3 point adapter like this one.

 

[Malort]

This one is close, would need to open up the diameter a bit.

https://mbrebel.com/product/1-250-1-258in-32mm-sprocket-adapter-u-s-a-for-occ-freewheel-hubs/

 

[Timbone]

Without looking, I’m pretty sure the OCC sized adapter is sized 1.25”. It’s fine to carefully grind off the material to make it fit. In fact, leave the finished surface a little rough and it will grip the hub better.

 

[Sitherus]

Without looking, I’m pretty sure the OCC sized adapter is sized 1.25”. It’s fine to carefully grind off the material to make it fit. In fact, leave the finished surface a little rough and it will grip the hub better.

What tool do you recommend I use to grind it down.

 

[Malort]

You don't have much material to remove, so something like this mounted in a drill may work.

https://www.amazon.com/T71791-4-Inc...id=1524622633&sr=8-3&keywords=brake+hone+tool

I know a guy, so I used a CNC mill to open mine up.

 

[Timbone]

You could use a round file or a dremel tool. Maybe a small stone made for a drill motor. Whatever method you choose, be patient and keep it round. You got this!

 

[Timbone]

This one is close, would need to open up the diameter a bit.

https://mbrebel.com/product/1-250-1-258in-32mm-sprocket-adapter-u-s-a-for-occ-freewheel-hubs/

That’s OCC hub size. You can make it work with a little grinding.

 

[Deleted member 25783]

What tool do you recommend I use to grind it down.

The best possible way to enlarge a sprocket adapter is mount it on a faceplate and bore it. In either a milling machine or lathe. Timbone's methods will not suffice. At the least concentricity will be lost.