Drill hole in tube?

Use one of these to get started: Center Punch - Automatic Center Punch with Brass Handle

Then drill a tiny pilot hole, then expand to 1/4 inch drill bit. Or skip the pilot hole if you're feeling brave...

 

that should work

 

Unlike your Potassium Battery pack... Lol

 

hey, don't discount future technology, the future is now

 

That tube will bounce around like a mexican jumping bean on a pogo stick. What's inside diameter? Can you get a dowel rod to match and put inside so you can clamp it down without distorting the tube? No matter what, I still think a punch to start the hole is the best idea. Use a drill press, not a handheld drill, and anchor the tube so it can't bounce around.

 

Must go try this.

 

That kind of thinking is so yesterday and outdated!

 

I'd use a Drenel with a burr tip to grind a depression in the place where you want to drill the hole and drill it out with a clean cutting step bit like a Unibit.
A Unibit will cut a clean round hole in thin metal,

 

why not flatten the hose clamp on a tabletop, make a punch and drill a hole through the clamp, then put the clamp around the tube and use it as a guide?

...you still want to anchor the tube, and I like the dowel idea.

 

A small, pilot hole will set the direction and location. Than larger bits as needed to finish.

Second alternative, now you can justify that drill press and clamps. <GRINS>

Bob Wilson