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Old 07-03-2015, 09:00 PM   #1
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Default drilling into metal

Im trying to make metal brackets just out of flat strips of metal. And all my drill bits are having trouble getting through it. Ive broken a hand full of bits. Are there actual drill bits for metal? Ive looked all over, I see hardened, and zinc covered, etc.
Also looking for screws that will be easy to drill into metal, say like my car frame. Picked up some metal screws from Ace but theyre not going anywhere through it.
I have pics of what my project is if itll make it easier to see what im trying to do.
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Old 07-03-2015, 09:03 PM   #2
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sounds like you're just using some trashed bits that have been overheated. get yourself a fresh bit and use some oil on it. you don't need to put your whole body weight onto the drill either.
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Old 07-03-2015, 09:03 PM   #3
 
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A hardened bit slow the drill down a little and hit it with some wd40 once in a while
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Old 07-03-2015, 09:05 PM   #4
 
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Default drilling into metal

Most steel is soft. Take and hit them with a file if it cuts with the file, drill bits from ace should go through it. If it screeches with the file the steel is hardened. I doubt it is however.

Holes should be started with a center drill it does not walk like a drill and then drill though with a drill bit. Drill bits like I use at work are made of high speed steel which is hardened and should go through just about everything normal people would drill through.
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Old 07-03-2015, 09:07 PM   #5
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Get new bits and get some WD40 to cool down the bit while you're drilling. While you're drilling, just barely squeeze the nozzle to get a tiny flow of wd40 for a second or two every couple seconds.
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Old 07-03-2015, 09:28 PM   #6
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Or use actual cutting fluid as wd-40 is thin and not ideal for cutting
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Old 07-03-2015, 09:47 PM   #7
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Yeah, don't try to dry fuck the metal with the bit. Cutting fluid is your friend. A fresh bit, too. How big of a hole are you trying to make? How thick is the steel?
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Old 07-03-2015, 09:48 PM   #8
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Try using a Christmas tree/stepped bit. Don't bother with any from harbor freight. They break better then they cut. If you're drilling into stainless then you need to go slow so it doesn't heat up and burn up your bits. Remember, you're trying to cut through the metal, not get it hot and punch through it. Doesn't work like that. Good luck and wear your safety glasses. Just had a friend get a metal sliver in his eyes, doc had to pick it out with a needle. He lost a whole line of vision in that eye.
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Old 07-03-2015, 10:00 PM   #9
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Spin the drill slowly! Most people use wayyyy too high of a speed. All the high speed will do is ruin your bits
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Old 07-03-2015, 10:10 PM   #10
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Spin the drill slowly! Most people use wayyyy too high of a speed. All the high speed will do is ruin your bits
Pretty much this. It's hard to go too slow. Also, start small and drill bigger.
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Old 07-04-2015, 12:55 AM   #11
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Drill slow, use cutting fluid, and for really tough metals spring for a full carbide bit.
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Old 07-04-2015, 01:27 AM   #12
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Or use actual cutting fluid as wd-40 is thin and not ideal for cutting
It's a poor man's quick solution and has worked for me just fine and have kept my bits sharp.
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Old 07-04-2015, 01:31 AM   #13
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yeah but nothing will work to keep yer wit's sharp....

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Old 07-04-2015, 06:23 AM   #14
 
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I assume you're trying to do this with a hand drill? If you've already heated up the bracket it may be work hardened and then you need carbide/masonry bits. However masonry bits are poor for hole size accuracy.

I'm at work and if you're on my way home I can drop you the proper stuff pm me by 3:00 today.
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Old 07-04-2015, 11:41 AM   #15
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Ill post of pic of the brackets im drilling. But the oil and wd40 I didnt think of. Pretty much raw dogging the metal with the drill bit. And I do tend to go fast on it, not the highest setting on the drill but it aint slow. I try to drill through it first with a small bit to get a little hole so the screw has an easier time going through. Usually that results in a broken bit because its so small and im so manly I already broke a new high speed bit last night, a small one. Im probably pressing too hard on it.
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Old 07-04-2015, 11:54 AM   #16
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Self tapper screws are your friend.
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Old 07-04-2015, 12:51 PM   #17
 
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Old 07-04-2015, 01:40 PM   #18
 
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I use these for metal with a drop or two of oil.

Search results for: 'stepped bits'
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Old 07-04-2015, 02:05 PM   #19
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I've got a Hilti stepped bit that'll cut through anything like butter. Love that thing! @greasy
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Old 07-04-2015, 02:16 PM   #20
 
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I have the goods
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Old 07-04-2015, 02:26 PM   #21
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Ill go to the store and take a look for those hilti step bits. And thanks for the offer man, I think ill be alright, I just have a few more holes to go. That is a nice selection though lol
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Old 07-04-2015, 02:44 PM   #22
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Cutting fluid, slow the speed down, drill in steps. If you're doing a 1/2" hole, start with a 1/4" then 3/8" then your 1/2".
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Old 07-04-2015, 05:41 PM   #23
 
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What everybody else said plus...in the muffler area of the parts store they sell metal pieces can can be quickly made into brackets
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Old 07-04-2015, 06:36 PM   #24
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I've got a Hilti stepped bit that'll cut through anything like butter. Love that thing! @greasy
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Old 07-05-2015, 11:29 AM   #25
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Yea I get those flat 1" wide pieces of metal from menards or ace and bend them and what not.
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