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Old 07-07-2009, 06:04 PM   #1
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Anyone recommend a drill bit set they've had good luck with? I've always kinda took the less expensive road on bits, but got sick of the chinese junk and went out and bought a nice 22 piece craftsman cobalt bit set. I paid around $75, but these things aren't worth a ****e! To top it off, the case is junk and also fell apart. Am I missing something? Using these bits mostly on mild steels, using a cutting oil when practical, but I'm just not happy at all with this set. Can anyone recommend a bit they've had good luck with? Looking for just a general set, like 1/8' thru 3/8'. (Metric sizes really small thru kinda medium for you Canadiens ) thanks!
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Old 07-07-2009, 06:12 PM   #2
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I dunno. I get them in envelopes from Fastenal. If you need a popular size, like say 1/8" or #7, they sell them in envelopes of 10 or 50 fairly inexpensively for decent bits. If wear is an issue, TiN (titanium nitride) coated bits wear a little better.

I find, in general, that guys who complain about junk bits are burning them blue right off the bat. It's all about speed and pressure. Make sure you're cutting a chip and not spinning in a hole. That'll tear up even the best bits.
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Old 07-07-2009, 06:16 PM   #3
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I dunno. I get them in envelopes from Fastenal.
Same here.
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Old 07-07-2009, 06:36 PM   #4
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I have only needed 2 size bits.. 1/8 and 1/4 and got them by the pack from GRAINGER
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Old 07-07-2009, 07:08 PM   #5
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I find, in general, that guys who complain about junk bits are burning them blue right off the bat. It's all about speed and pressure. Make sure you're cutting a chip and not spinning in a hole. That'll tear up even the best bits.[/quote]


Yeah, that could be part of my problem, sometimes I'm one of those guys that doesn't think it's tight enough untill it strips I've been using these to drill through perlins to hang fixtures, maybe i've been spinning them too fast? The 1/4' didn't last me a day. Thanks guys, Im gonna stop at fastenal tomorrow to see what they got, they've treated me well in the past.
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Old 07-07-2009, 07:12 PM   #6
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Yeah, if you're using a popular size, like 1/4" for your eye bolts in the purlins, don't use the good one out of your "set". Get a packet full of 1/4" bits and chuck them in the trash when they start to dull.
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Old 07-07-2009, 07:59 PM   #7
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1/4" and 3/8", buy them by the bucket.
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Old 07-07-2009, 08:13 PM   #8
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The 1/4' didn't last me a day.
How many holes are you getting out of those bits?
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Old 07-07-2009, 10:37 PM   #9
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98% of the drilling i have to do is in steel and i have ended up always carrying one of those hole saw arbor bits in my pocket. its a 1/4 inch bit and they seem to last really well. pretty handy size.

as a set i picked this dewalt kit that was on sale at home depot for like 15 bucks (canadian). the set where the bits have the pilot points on each bit. and i swear i have never seen a bit go through steel like those. i had to mount straps in 3/4 i-beam and they were money.

the weird part is they are soft and do bend so have to be careful but yeah...i am still shaking my head at how those things flew through that i beam. pretty cheap to try them out and see how they work for you.

paul.
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Old 07-07-2009, 10:43 PM   #10
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1/4" and 3/8", buy them by the bucket.
And/or just get a Darex Drill Dr. and collect all those spent bits. You can resharpen a pile of them good as new in just a few minutes either right at the jobsite or back at the shop in your spare time. Iíve had my Drill Dr.750 Pro for years and it has really cut down on the tossing out of dulled drill bits.
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Old 07-08-2009, 06:42 AM   #11
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Originally Posted by paulcanada View Post
98% of the drilling i have to do is in steel and i have ended up always carrying one of those hole saw arbor bits in my pocket. its a 1/4 inch bit and they seem to last really well. pretty handy size.

as a set i picked this dewalt kit that was on sale at home depot for like 15 bucks (canadian). the set where the bits have the pilot points on each bit. and i swear i have never seen a bit go through steel like those. i had to mount straps in 3/4 i-beam and they were money.

the weird part is they are soft and do bend so have to be careful but yeah...i am still shaking my head at how those things flew through that i beam. pretty cheap to try them out and see how they work for you.

paul.
i had some of those dewalt bits, i had one bind up and it bent over. i mean like a full 90 bent over. and it was like a 1/4" it wasnt a little needle bit.

i guess they use some really soft steel.
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Old 07-08-2009, 07:56 AM   #12
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i know its weird how such soft stuff cuts so good.
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Old 07-08-2009, 08:37 AM   #13
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And/or just get a Darex Drill Dr. and collect all those spent bits. You can resharpen a pile of them good as new in just a few minutes either right at the jobsite or back at the shop in your spare time. Iíve had my Drill Dr.750 Pro for years and it has really cut down on the tossing out of dulled drill bits.
We had a tool crib on a resent big job and the guy running it started sharping drill bits. They looked fine but they seamed to loose their temper and dulled quickly. I don't know if it was his grinding or they temper was destroyed before he got them. Is their a way to retemper the bits?
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Old 07-08-2009, 10:07 AM   #14
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We had a tool crib on a resent big job and the guy running it started sharping drill bits. They looked fine but they seamed to loose their temper and dulled quickly. I don't know if it was his grinding or they temper was destroyed before he got them. Is their a way to retemper the bits?
Soon as the tip turns blue when resharpening they're toast. You want to sharpen them like a chisel dipping them in water in between passes on the grinder to dissipate the heat.

As for the original poster the cobalt bits should be fairly good as long as you don't abuse them. Also I would pick up another index case that wont fall apart.

http://store.huot-store.com/tool-sto.../dtri-dus.html

These Norseman magnum drill bits are supposed to be pretty good.

http://www.fairburyfastener.com/norseman.htm


And as for the Canadian comment at the end... screw that it was the US government who pulled the wool over our government eyes saying that they were going to change to the metric system... only to back out at the last minute after we started because they thought it would cost to much to change over.
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Old 07-08-2009, 10:15 AM   #15
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Originally Posted by MDShunk View Post
I dunno. I get them in envelopes from Fastenal. If you need a popular size, like say 1/8" or #7, they sell them in envelopes of 10 or 50 fairly inexpensively for decent bits. If wear is an issue, TiN (titanium nitride) coated bits wear a little better.

I find, in general, that guys who complain about junk bits are burning them blue right off the bat. It's all about speed and pressure. Make sure you're cutting a chip and not spinning in a hole. That'll tear up even the best bits.
I refuse to by anything from Fastenal because of their "Minimum" policy. You can't hardly find anything in there that you don't have to buy at least a quanity of 25 (which I think is pure B.S.).
I stick to the local "Mom & Pop" hardware stores that still let you decide how many of something you want.
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Old 07-08-2009, 11:31 AM   #16
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Anyone recommend a drill bit set they've had good luck with? I've always kinda took the less expensive road on bits, but got sick of the chinese junk and went out and bought a nice 22 piece craftsman cobalt bit set. I paid around $75, but these things aren't worth a ****e! To top it off, the case is junk and also fell apart. Am I missing something? Using these bits mostly on mild steels, using a cutting oil when practical, but I'm just not happy at all with this set. Can anyone recommend a bit they've had good luck with? Looking for just a general set, like 1/8' thru 3/8'. (Metric sizes really small thru kinda medium for you Canadiens ) thanks!

Lawson makes awfully good drill bits, but you pay for them!!!!!
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Old 07-08-2009, 03:11 PM   #17
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just get a Darex Drill Dr. and collect all those spent bits. You can resharpen a pile of them good as new
Well, maybe not quite good as new. Been using Darex for years and the resharpened bits never last quite as long as new. Makes sense because you really cant afford a machine to sharpen a bit like the manufacturers use. Still well worth doing though, saves lots of money over the years. Especially for cobalt bits. Estimated cost (for replacement sharpening wheels) runs about 20-40 cents per sharpen, depending on size and type. This doesnt count your labor (time) cost which is less than a minute each. Compare that to the cost of 1/4 to 1/2 inch cobalt bits and its a no brainer.
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Old 07-08-2009, 03:36 PM   #18
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I got a cheap uni-bit from a store called Tons of Tools (19.95) Works great so far.
Gotta love uni-bits. Small and cuts a 7/8 KO .. stores easy in the battery drill box.
Other than that the box that Depot sells work OK for the price.
Than again I'm union so the company is supposed to buy the bits.
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Old 07-08-2009, 03:38 PM   #19
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How many holes are you getting out of those bits?

I got maybe 35 to 40 1/4 holes drlled into purlins and then noticed the bit was getting dull enough that I knew the spinning action to drill additional holes were causing the bit to overheat and really degrade fast. Maybe I had unrealistic expectations for a cobalt bit, my experience in the past was with whatever bits I could get my hands on. In my mind, the high price of these had me thinking I would get lots and lots of holes out of them before I even began to think about resharpening/replacing. It wasn't like I drilled the holes one after the other either, I was probably getting a fixture hung every ten minutes or so. Probably just overheated them with too much pressure spinning too fast. Expensive lesson, but i just guess that means I'll remember it longer. What really peeved me off was the case falling apart. When I was at the store mulling over the purchase, I was thinking "I don't know, plastic case.... awww it will be fine". Shoulda heeded my gut feeling.
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