Quote:
Originally Posted by Morgan
Hey,
I bought my bus a few months ago and I'm working on getting the walls and ceiling off to insulate and whatnot. The issue is that they are riveted into place.
So I've been punching the centre of the rivet out then drilling the head off. It's tedious but manageable, sort of.
I've managed to bend 3 punches so far. I'm assuming that it's because I'm using the cheap home depot one. Would a better quality punch be worth the money?
I'm also going through drill bits like you wouldn't believe. At first it's like 15 seconds per rivet. It takes longer with each one, after like 20, it's up to over a nimute each. Doesn't sound too bad, except there are thousands of rivets!
I'm buying drill bits for metal but that doesn't seem to help. I've easily spent $100 on bits and barely made a dent. I bought a sharpener but i guess there is a bit of a learning curve because I think I made my practice bit more dull!
Where am I going wrong (besides buying a riveted bus rather than one with screws)? It's becoming frustrating and expensive.
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All of the above suggestions are good stuff. Particularly, mmoore's method. I'm into heavy metals, as well. Or maybe not 'drill' the rivets, as echoed above.
If you must drill (or cut anything) you should know that friction dulls the cutting edge quickly.
Speed - much lower rpms,
Pressure - little to none
Lube - oil, silicone (not wd40)
Use high quality name brand bits (Diablo, Lenox, Dewalt) made with a substance harder than the steel which is being cut (cobalt, carbide). TTP HARD drill bits are 5% cobalt.
Always, start with a tiny pilot hole and step up to the next size until the hole is 'reamed' to the finish size.
I can't stress enough, Speed, Pressure, and lack of Lube will dull a blade in seconds. Properly operated blades/bits ought to last for 1000s of cuts - years. Use the correct (slow) speed and plenty of cooling lube on every pass.