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| Making a Rotary Table |
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| vtsteam:
Norman, I'm with you on not de-gassing (or fluxing) aluminum melts. I never have, but the aluminum stock I used was clean and always from castings rather than mixed extrusion scrap. I poured relatively cool, unless very thin castings were required, there was minimal dross, and the charcoal protected the top of the melt. It poured nicely, and it looks like yours does, too. I don't think the circles are perfectly evenly spaced so I'll take a guess at what they are -- pickup of a small aluminum welded chip on the lathe tool tip, and it gradually wearing off, then picking up a new one. |
| awemawson:
Norman, consider a thin sheet of Teflon as a bearing if space is tight. The large surface area gives loads of load capacity, and as it will always be a slowish rotation there is no issue with speed and heat. |
| NormanV:
Teflon would certainly be less bulky than a bearing. I managed to dismantle the piece of equipment that I have with the ring bearing. Here is a photo, the balls run on hardened steel. Would this be Ok to take the cutting forces? The balls are approximately 4mm dia. Rather than try to clamp the table down onto the top of the body I could use a split cotter on the spindle. Any comments? |
| awemawson:
Does the Admiralty know that you have that gun mounting :lol: |
| vtsteam:
I think it was just a really serious Lazy Susan :lol: |
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