Dual drill bit?
On Mar 14, 7:29*pm, (Robert Dunham II) wrote:
I want to drill a piece of 3"IPS (3.5"OD) Sch. 80 wall steel pipe so
that a 2"IPS (2.375"OD) pipe can go through it and also have the hole
beveled for welding, is there such a drill available for purchase.
No.
There are stepped drill bits available. Most of them have the larger
step ground square, like a counterbore, but you can find some with
angled steps. Or have them ground that way by a sharpening shop.
Those will cut a hole plus a bevel, or countersink. They would work
fine on a piece of flat plate. On a piece of pipe, though, all they
would do is bevel the very top of the curve.
2.375" is a pretty good sized drill. And it's tough to drill through
a piece of pipe without the bit grabbing. You might consider a hole
saw instead.
John Martin
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