Drill Bits For Steel?

[blueboy]

those sets are one of the most expensive kits in an electrician's toolkit, but completely necessary when punching through panels.

Yes, yet, cordless hydraulic punchout tools are used by many as well.

 

[WreckITFrank]

Those are beyond my time in the trade, but look the way to go. I have a hydraulic and hand punch set from greenlee, which at the time was told they were worth more than me and that I had to carry them around with me. Ironically after the job they let me keep them.

 

[Napalm00]

Sounds like they're better than the deWalt cobalt bits. This happened with the first hole I drilled with this bit. Just as it broke through it jammed, as sometimes happens, and this was the result. This was with a handheld drill, not a drill press, and I'm a weak old man that can't exactly exert a lot of torque through my wrist. Not recommended.View attachment 18248

if it bent the cobalt % must be very very low. Cobalt bits are very wear resistant but shatter.

 

[WreckITFrank]

Id go for a warranty on that guy. Standard 90 day on them I believe.