All Questions
4 questions
11
votes
9
answers
36k
views
How to drill holes in 3/8" thick steel plates?
I had to drill some 1/2" holes in 3/8" steel plates. In addition to taking something like 15 min per hole, a brand new drill bit lasts maybe two holes and it is trash.
What is the best way to drill ...
- 7,584
6
votes
2
answers
3k
views
Drilling 1/4" steel plate and concrete?
I need to drill (44) holes in (22) 1/4"-thick stainless steel plates. These are for 3"x3/8" heavy Duty Screw Anchors that will go through the plate and into the concrete.
My question is: if possible, ...
- 2,133
2
votes
5
answers
20k
views
How best to drill pilot holes through hardened steel exterior door frame?
I'm trying to drill pilot holes through my exterior door frame in order to install a weather seal.
I purchased a few new cobalt drill bits labeled for hardened steel.
However, each new bit was ...
- 133
0
votes
3
answers
926
views
what kind of drill bits are these? Trying to drill through flat side of a fence T-Post
I'm trying to drill through 1/4" hard steel. the thicker bit went through relatively easily one time, but on the second go just spins. the thinner bit did not go far .. i think both need to be ...
- 239