Homemade mainline tool?

[stoweski]

As I was lying in bed awake at 4am this morning I was thinking about how I could drill my mainline with my cordless drill without it wandering on the tubing.

The idea I came up with is essentially a pair of vice grips with 1/2 of a 3/4" dia (size of my tubing) pipe welded to each jaw. On the top half there would be a hole for the bit. Clamp down and drill.

Seems to me that this would work. Anyone out there have a tool like this or some other contraption that works for them? I'll only be installing up to 25 so it's not worth buying the mainline tool.

Picts would be great if you have any.

[WMF]

That would work but is one more thing to carry with you. A new large Unibit works best of any thing I have tried. It wont wander, deburs the hole and can drill different size holes. Use it for plastic only and don't let it rust and it will last a lifetime.

[Dennis H.]

Heck do away with the cordless drill and put a small crank handle on that drillbit and you have a mainline hole drilling tool if I ever seen one.
Alot lighter too.