Which sharpener do you use?I've recently invested in a bit sharpener as well. A few seconds sharpening and a quality bit is good as new. The other thing I've bought is a step drill bit and using that when I can has saved my sized other bits a lot of wear.
The Drill Doctor DD750X based of a Project Farm comparison video. You could definitely go much higher end but at $130 for this one it's worth it for the amount of life I'm getting out of my bits now. I used to go through them every couple holes it seemed.Which sharpener do you use?
Agree with this,What material are you drilling? Whatever you use, don't overheat the bit. Use an RPM table, peck the material if needed, and use cutting oil.
I haven't done much bulk work recently, but when I first bought my house ~9 years ago I did the exact same thing. I bought these from McMaster and treated them like they were disposable.I forgot to mention, for the most part I use the same sizes of bits over and over again, especially 1/8" for pilot holes. Years ago I started buying the few common sizes in bulk, and never worry about them too much. 1/8, 3/16, 1/4, 5/16 are probably my most used. Have a blister pack of like 25 of each and just use them as disposable.
From McMaster Carr:
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Good info on why a drill bits cuts a three sided lobe. If you don't want to watch the whole video start at minute 11.
I’ve used them to do holes in the tub for rear lights. The holes are perfect unlike a hole sawI wonder if that would work to cut a hole in a bulkhead for the ECU wiring harness. I end up melting a wood hole saw bit every time I do it.
those sets are one of the most expensive kits in an electrician's toolkit, but completely necessary when punching through panels.The best thing I have used for cutting large holes in sheet metal is a Green Lee punch
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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.The Bosch cobalt ones seem to be the best. That is my conclusion after hours of research. So I bought a lifetime supply when they were on sale a while back.