marking the block

[Renate Dirkd]

Dear listers,

I've been away or would have replied sooner.
Thanks to all who responded to my question about marking the pinblock
for dead center drilling results. I've have used a punch for years and
am staying with that after some experimenting. I tried center punching
and than drilling small diam. shallow pilot holes hoping the bit would
follow; didn't work well. What did help was to outline the plate on the
block in pencil. Although the punch doesn't always jive with the pencil
circle, I suppose because the casting is not consistant to that degree,
the circle gives a belt and suspenders reassurance that I'm in the
center. I drilled a block today and it turned out perfect. Thanks again.
(Hi Newton)

Bob Dowling nj