Column extension for vertical mill

S

skipd1

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I would like to expand the work envelope of my clausing 8520 vertical mill as with a decent vise the span is bout 11 inches. I have not had any luck finding a factory column extension so I am wonder if it is possible to make one out of heavy tube or welding a stout block and trueing it up on the lathe. What to you guys think is the best way to do this, without spending a fortune and hopefully keep the regidity in my mill. I was thinking of 4-6" lift.

Skipd1
 
I would make a riser similar to a Bridgeport to bolt under the swivel. I'd go with a solid pc for rigidity though.
 
You may want to consider a square tube or bar stock you can bolt together of Dura-Bar
Very stable and easy to machine.
 
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