Problem work holding

[Wreck™Wreck]

One of yesterdays jobs.
Easy to hold yet difficult not to scratch when doing so. 4 1/2" diameter clear PMMA tubes 16" long faced to length at 15.938 +-.005"

The only lathe that we have with a 4 1/2" + spindle bore is a WW2 era W&S turret lathe which is not ideal for delicate work of this nature (-: Also it is Customer supplied material, 20 parts total and they supplied 1 extra which was nice of them.

Made a CPVC split collar and had at it, this was not a fun job considering all of the careful handling. This method of part holding works reasonably well for such things, they will now go in a mill for slots and holes, haven't quite figured out how to hold them in a spacer yet, any ideas are welcome.

 

[T Bredehoft]

hey will now go in a mill for slots and holes,

Make an arbor, end cap on one end, chuck the super spacer on the arbor. put the piece on, put another end cap on the other end with a center in it, use the live center in the tail stock to secure/support the whole thing, have at it with the mill. Perhaps a threaded rod through the center, a nut on the end to tighten it in place with a center in the threaded rod.

 

[Wreck™Wreck]

Excellent idea, making the part is easy, not scratching the stock is difficult.

And yes I often turn parts on plugs.