Hi All,
I'm thinking about a hobby project for which I want to turn a small capstan drum to fit on a shaft. I worked up a conceptual model (drawing attached) with function but not machinability in mind and have since been trying to think through how it could actually be turned. I think I see a couple challenges to actually making this design:
Totally open to changing the design to make it easier to machine, e.g. making the end "flange" a separate part that gets welded/screwed to the main body or...
Would appreciate if anyone has any thoughts on this--thanks for reading!
Mike
I'm thinking about a hobby project for which I want to turn a small capstan drum to fit on a shaft. I worked up a conceptual model (drawing attached) with function but not machinability in mind and have since been trying to think through how it could actually be turned. I think I see a couple challenges to actually making this design:
1. My first thought was this seems similar to a pulley, and the standard way I see for turning pulleys is to drill/bore out the center bore, then mount the part on a mandrel and turn the OD features. But seems a tapered or other mandrel wouldn't provide good support for a piece this long, especially considering the center bore is only about half of the part length.
I think mounting this in a chuck without tail support would probably work, though it would require 2 setups (drill/bore the shaft bore and OD in one setup, then flip and bore out the cavity). Securing it for the second setup could be a little tricky, but maybe this is still the best way?
2. Tool/tool holder clearance when turning the external recess between the "spool ends." I imagine I would use several partial depth cuts with a parting tool to make a starting "kerf" at one end to avoid plunging the turning tool, but seems the angle of the tool/holder required for turning to the far shoulder could interfere with the part at the start of the cut.
Totally open to changing the design to make it easier to machine, e.g. making the end "flange" a separate part that gets welded/screwed to the main body or...
Would appreciate if anyone has any thoughts on this--thanks for reading!
Mike