Universal Mandrel??

[OTmachine]

Part off close to size, then hand lap or buy correct size sheet stock.

 

[B2]

How do you get a very thin material part separated from the substrate holder, without bending it etc., when you use superglue?

 

[Charles scozzari]

I find myself turning a lot of relatively thin and flat disks (like washers and such) lately. I have been wondering if anyone knows of a (semi-)universal mandrel that will hold a variety of parts with different centers and thicknesses. Any thoughts? I hoping for something I can make for myself.

These work for me. I modify as needed. I then clean the O.D. flat to get a better bite in a collet if needed or to hold in the chuck to open the I.D.

 

[jwmay]

How do you get a very thin material part separated from the substrate holder, without bending it etc., when you use superglue?

Heat

 

[homebrewed]

Sacrificial holders can be another approach, depending on what your specific requirement(s) are.

 

[Jim F]

 

[RaisedByWolves]

How do you get a very thin material part separated from the substrate holder, without bending it etc., when you use superglue?

Heat.

Spin it slow while holding a torch to it and it will pop right off. Acetone should clean it up nicely.

 

[Firstram]

Heat.

Spin it slow while holding a torch to it and it will pop right off. Acetone should clean it up nicely.

Exactly. You can also soak the mandrel in acetone if heat will be a problem.

 

[B2]

@Jim F
Thanks for the video links. Did I miss it? What was the clutching material used? I assume it needed to be somewhat compressible.

 

[Jim F]

@Jim F
Thanks for the video links. Did I miss it? What was the clutching material used? I assume it needed to be somewhat compressible.

card stock, un-coated.