- Joined
- Feb 25, 2016
- Messages
- 104
I just ordered a “weld on” sprocket with 36 teeth. I want to make it an overlay sprocket fitting a 27 tooth sprocket. That will require boring the 36 tooth to equal the 27 tooth OD. Then I need to make 4 to 6 half holes to line up with half holes where the chain rollers fit in the 27 tooth sprocket. Bolts go through these holes to hold the two sprockets together. My thinking is that roller chain does not require as close tolerances as gears. I have considered making a hub for the 36 tooth sprocket so that I could bolt through where the chain rollers go but I hope there is an easier way. I would like some suggestions for the following: How do I hold the new sprocket so the bore will be concentric with the pitch circle? How to locate the half holes. I have a 13” lathe and mill but no rotary table.
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