RF-45 Downfeed Lock Knob

[PixMan]

(06-03-2012, 10:32 AM)Highpower Wrote: I've done the same thing to make quill locking pins for my mill. The cutouts almost appear to be straight cut rather than an arc. But I was cutting a larger radius.....



Math isn't my strong point so don't confuse me with facts Henry.

I just thought your cutouts would have had a wider arc than they do at that size radius. Which just goes to prove - "Be cool, stay in school!"

Willie,

If you ever again need to do bores that size again, I suggest you consider putting the boring bar in the holes at the end of the moving slide of the boring head rather than cranking the slide out so far. You'd get more reach and the boring head would retain more rigidity.

That's a high quality boring bar, BTW. I've got a cheap Chinese knock-off and it's not nearly as smooth as a Criterion. I have used the 3" head with boring bars sticking out the side to bore holes of over 12" (in medium density fiberboard.)