johnsmachines

OK.  The concrete is aerated… Hebel.

But, it does turn easily and cleanly.

But it is concrete, and probably very abrasive, so I have covered everything in plastic, and used an old carbide cutter.

I needed to refine the dimensions and shape of the supporting block while brazing  my 6″ vertical boiler, so I turned it.  And it worked brilliantly.