Re: [Emc-users] Thing with a square hole.

[John K. <jmk...@fa...>]

You could mill a 10mm wide x 5mm deep slot in two rectangular bars, then silver-braze them together.
Might not be strong enough, depends on if the OD is big enough to leave a reasonable joint area.
Welding would probably leave a hardened zone and be miserable to machine afterwards.

John


On Mon, Mar 20, 2017, at 09:58 AM, andy pugh wrote:
> I want to make some D1-4 cams for a 4th-axis project.
> These need a 10mm square hole (but 3/8 would be fine too).
> I don't think I can polygon-bore a square, it needs too much
> tool-relief. (I guess I should try, though).
> 
> If I could find something like a 3/8" drive socket with no hole in it
> that would be a good starting point. Any ideas?
> 
> I have thought of having a hex hole and starting from an M24 grub
> screw (setscrew). But those cost about the same as an actual cam.
> (though the only source of cams I have found in the UK have no stock,
> or I would have bought them).
> http://spares.xyzmachinetools.com/XYZ-TRAINER-1330-1340/products/29/
> lists zero stock at £7.77
> 
> 
> -- 
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1916
> 
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-- 
  John Kasunich
  jmk...@fa...