On May 19, 7:05*pm, Karl Townsend
wrote:
I was using the radial arm drill this afternoon to drill a couple 3/4
holes in 1/2 inch plate. I needed to copy the hole spacing on a part
I'd ruined so I clamped it to the plate with a couple vice grips. Then
in the drill vice and drill the hole in one shot. The drill grabbed
right when busting through and the part pulled right out of the vice
and turned into a helicopter.

I'm glad the vice was as high as it was, I just got a nasty bruise on
my belly. If it had been a few inches lower, I'd be a soprano right
now.

Karl

Karl

Sir,

Next time for this purpose you may wish to try a 3/4" bi-metal hole-
saw instead of a drill.

There is considerably less drama on break through with a hole saw.

3/4" is about as small as hole saws come though.

If work-size makes it possible, I prefer to do that size hole with the
work in a 4-jaw chuck in the lathe and using a boring bar.

Safe swarf,
PaulS