newsman wrote:
I need to cut a notch in the end of sched 40 3.5 inch pipe to allow 2 inch
pipe to pass through it. Available tools are reciprocating saw, drill press
with bits up to 1 inch and bimetal hole saws, and cutting torch. What's
the best way to do it? The notch needs to be snug because the 2 inch pipe
will be welded to the 3.5 inch pipe using stick welding.

If you've got a good bimetal hole saw, and your drill press will run at
the appropriate speed, and you can clamp everything down solidly, then
that's the way to go.