On Feb 9, 10:34*am, Ignoramus25972 ignoramus25...@NOSPAM.
25972.invalid wrote:
I have a little project which would be to put my 1,400 lbs generator
on a heavy duty Radio Flyer cart and make outboard legs, so that when
it is stationary and not being moved around, it stands on those legs
and is not supported the wheels of the cart.

To that end, I would need to drill an estimated number of 112 holes,
probably 9/16" or 5/8" diameter each, in 3/16" steel tubing.

This does seem like a great CNC project. My question is how to drill
them with minimum fuss. I would prefer, if possible, to avoid any tool
changes and general putzing around.

So, what is the CNC guru's approach to this? Just get a short 5/8"
drill bit? Or to bore them with something smaller?

I do not care too much if, say, boring takes a bit longer, the machine
will be working and not me. But I would personally prefer to avoid
tool changes and hassles.

i

Step drill from HF? Or spend the big bucks and get the real deal from
Irwin, AKA Unibit. I've done switch holes in steel panels about that
size with one. Just depends on whether you just need a hole or a
precision bore. Look elsewhere for a precision bore. A set can be
had on sale from HF for cheap, even more if you've got a 20% off
coupon.

Stan