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Who makes the best drill bit? what kind? titanium, colbalt? what?

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eric

03-03-2003 08:16:11




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well? thanks for your thoughts.




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Ludwig

03-04-2003 17:53:14




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 Re: who makes the best drill bit? what kind? titanium, colbalt? what? in reply to eric, 03-03-2003 08:16:11  
Until recently I had never used a titanium drill bit, but I had to pick up a new bit to drill some pilot holes to put sheet metal screws into. The hardware store didn't have any conventional bits and I didn't want to go driving around all day so I bought the titanium. Liked it alot, seemed like it drilled faster holes without running the drill as fast as I would with a regular bit.
More pricey, but good stuff.

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Wayne

03-03-2003 20:34:42




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 Re: who makes the best drill bit? what kind? titanium, colbalt? what? in reply to eric, 03-03-2003 08:16:11  
Robert was saying that the harder Colbalt bits were harder to hold tight in a chuck, there is a way to eleminate that problem. If your already spending the little bit extra for a good quality bit, then on the larger sizes, say 1/2" and above, you can get bits that have factory ground flats on 3 sides. This allows the jaws of the chuck to grip on a flat and prevents the bit from turning in the chuck. I don't know where you guys buy bits, but for the best quality and price, you can't beat places like J&L Industrial Supply, or Grainger. In the end the extra dollar or two you spend on a bit will more than pay for itself in longer bit life, saved time, and saved swear words..... Just remember, if you have a good bit and need to resharpen it you still have a good bit, but if you buy junk, even resharpened it's still junk.

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Robert in W. Mi.

03-03-2003 17:55:03




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 Re: who makes the best drill bit? what kind? titanium, colbalt? what? in reply to eric, 03-03-2003 08:16:11  
For up to 1/2" in my cordless drill i like "Bullet bits" by Black and Decker. They drill fairly fast and use less power to do it. They drill pretty good in wood ect.. too. I really like the built in pilot point, but they are harder to sharpen, and you shouldn't try to open a previously drilled hole. I have a set of Colbalt too and they are really tough, but a lot harder for the chuck to hold too. I guess the only bits i don't like are the cheaper imports. Hope we were talking bit's for steel? Robert

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Kurt (mi)

03-03-2003 08:31:55




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 Re: who makes the best drill bit? what kind? titanium, colbalt? what? in reply to eric, 03-03-2003 08:16:11  
WHat material are you drilling into?, how big of a hole? I think that the High speed steel with M42 cobalt is just about the best.



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Tom Keehan

03-04-2003 08:59:14




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 Re: Re: who makes the best drill bit? what kind? titanium, colbalt? what? in reply to Kurt (mi), 03-03-2003 08:31:55  
I hope you guys don't mind me jumping in on this . I have found that a dill with 10 per cent colbot will drill about any steel and do it well. The biggest problem I have seen is that most people will run the drill too fast and the heat generated will ruin an drill short order, even if it is an expensive one.



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WD Tom

03-04-2003 17:34:52




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 Re: Re: Re: who makes the best drill bit? what kind? titanium, colbalt? what? in reply to Tom Keehan, 03-04-2003 08:59:14  
Maybe most people run drills too fast because the drill press or hand drill they have is too fast to. It is difficult to get a drill press or hand drill that runs slow enough for drills over 1/2". Even the double reduction drill presses you see everywhere usually don't go below 250 rpm, maybe some go to 200, but what is better is 150 and that is hard to find for reasonable money. Adding a larger pully somewhere is a way to get slower speeds. I have machined one to fit over the large pully on the idler pully, using a 1/8" plate to join them on the top side of the pully. Using small screws, (#8 or 6 if I remember) I was able to do this without the holes going into the groovs of the pullys, therefore allowing me to remove the larger pully if for some reason I wanted to. I don't see any reason you couldn't do the same to the larger step of the spindle pully which would work better as this is where you want the increased leverage for more torque without belt slippage. As for hand drills, I don't know. Without spending a fair amount ofmoney it is hard to find a slow drill.

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