Hey everyone, trying to drill out 1 1/4" holes for my heating elements. My new step drill bit is toast. I was even using cutting oil. Any help? or advise on what to use??
Get a new bit or use something like a Dremel with a grinding bit.
I know it's too late now, but I used a 1 1/4" hole saw with cutting oil on my keggles. Turned out fine.
As far as what to do next, how big is the hole you have right now?
I have an air grinder that I used to grind the metal down with just to thin it out so the step bit didnt have to work so hard.
thanks, called my local homebrew shop... they are going to plasma cut the hole out and tig weld the large nut I got from bargain fittings for my elements. I guess I will just screw them in to the welded nut. Sound like it would work??
That should work just fine.
Might be slightly cheaper to get a punch set from harbor freight tools. They have a 20$(?) punch set with a punch slightly larger than 1 1/4.
Quality is bad. My small punch broke. But the large one held up to one use.
That being said. Welding the nut on sounds like a much better solution.
I'd go welded...because my solution would have been to buy another step bit that goes to 1 1/4" and keep going with lots of breaks for cutting oil.
Have you thought about a radio punch? This cost more than the one I got here in town but it makes the best holes. http://www.amazon.com/Greenlee-730BB-1-1-Standard-Knockout-4-Inch/dp/B002NQZ0J0/ref=sr_1_1?ie=UTF8&qid=1343322156&sr=8-1&keywords=greenlee+radio+chassis+punch+knockout