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Thanks, this is helpful. Say, if I have a part like [1], what's the best way to get it done? I'm now leaning towards laser cutting the flat bottom (the geometr

Thanks, this is helpful. Say, if I have a part like [1], what's the best way to get it done? I'm now leaning towards laser cutting the flat bottom (the geometry allows for that) and then welding the top "clutch" after getting it lathed. Is there a better/cleaner/cheaper way to do it? The part should be metal. [1] https://i.imgur.com/1oqjQ7r.png https://i.imgur.com/1oqjQ7r.png

Scene_Cast2 3y ago
Laser / water / plasma / EDM cutting the bottom sounds quite reasonable. I'm trying to figure out what the application is here. It looks like you want to attach something to a shaft, and trying to use a collet with a set screw. Why not put the set screw in your bottom part? Or perhaps use a shaft key? What kind of forces and what kind of load is this thing taking? But if I had to answer your direct question: spec some screw holes, welding has downsides for what I think the application is (cost, axis alignment).
- huhtenberg 3y ago
  The shaft is a part of the existing rotisserie device. The shaft has a square cross-section and it can accept various mountable attachments, e.g. [1] and [2]. They all use collets, so I'm just following their design here. Force-wise - about a pound of load per "arm", give or take, not much really. Re: screw holes - noted, thanks. [1] https://www.amazon.com/GRILLJOB-Stainless-Rotisserie-1-Pair-Hexagon/dp/B08TTKP5V2 https://www.amazon.com/GRILLJOB-Stainless-Rotisserie-1-Pair-... [2] https://www.amazon.com/-/en/25437-R%C3%B6sle-High-Quality-Barbecue-Skewer/dp/B08QJKZWB4 https://www.amazon.com/-/en/25437-R%C3%B6sle-High-Quality-Ba...
  - Scene_Cast2 3y ago
    In that case, if you make your mounting part a square or rectangular block instead of a cylinder, this way you can avoid the use of a lathe. Or if you spec the outside diameter of your cylinder to be some common size (+/- some loose tolerance), then that would avoid machining the outside (as there's cylindrical metal slock). I also realized that my original suggestion of "set screw on the bottom part" is also probably hard to manufacture.
    - huhtenberg 3y ago
      Noted. Thanks again.

Scene_Cast2 3y ago

Laser / water / plasma / EDM cutting the bottom sounds quite reasonable. I'm trying to figure out what the application is here. It looks like you want to attach something to a shaft, and trying to use a collet with a set screw. Why not put the set screw in your bottom part? Or perhaps use a shaft key? What kind of forces and what kind of load is this thing taking? But if I had to answer your direct question: spec some screw holes, welding has downsides for what I think the application is (cost, axis alignment).

huhtenberg 3y ago
The shaft is a part of the existing rotisserie device. The shaft has a square cross-section and it can accept various mountable attachments, e.g. [1] and [2]. They all use collets, so I'm just following their design here. Force-wise - about a pound of load per "arm", give or take, not much really. Re: screw holes - noted, thanks. [1] https://www.amazon.com/GRILLJOB-Stainless-Rotisserie-1-Pair-Hexagon/dp/B08TTKP5V2 https://www.amazon.com/GRILLJOB-Stainless-Rotisserie-1-Pair-... [2] https://www.amazon.com/-/en/25437-R%C3%B6sle-High-Quality-Barbecue-Skewer/dp/B08QJKZWB4 https://www.amazon.com/-/en/25437-R%C3%B6sle-High-Quality-Ba...
- Scene_Cast2 3y ago
  In that case, if you make your mounting part a square or rectangular block instead of a cylinder, this way you can avoid the use of a lathe. Or if you spec the outside diameter of your cylinder to be some common size (+/- some loose tolerance), then that would avoid machining the outside (as there's cylindrical metal slock). I also realized that my original suggestion of "set screw on the bottom part" is also probably hard to manufacture.
  - huhtenberg 3y ago
    Noted. Thanks again.