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#16
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Re: pic: A "Bit" of a problem.
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Exactly!!! This reminds me of a story from my childhood: My 2 grandpas were helping my dad build a deck on our house when I was about 8 or 9. My job was to fetch things they needed. One of my grandpas needed me to hand him nails for the decking boards. "Andy, I need a good nail" "Here ya go, Grandpa" "No, that one won't work. It's for hammering the board up from UNDER the deck." It took me a few times until I learned to hand him the nail with the head facing up and the nail tip pointing down. Grandpas are great. Andy ps... as for the point of this thread, I too think that this bent bit is a case of backwards-drilling. C'mon, we've all done it at least once. Foley Frozen students are no different. ![]() |
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#17
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Re: pic: A "Bit" of a problem.
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I pointed out to the new girls in yesterdays meeting that they should not be timid and not participate because of fear of messing up and looking dumb. This week makes at least 3 years running that the boys have drilled backward holes. The girls have never done that. And yes the girls have drilled at LOT of holes. SCOREBOARD: GIRLS - 0 BOYS - negative 3 |
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#18
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Re: pic: A "Bit" of a problem.
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You have the part number correct, but the description is wrong. Everyone knows that the DeWalt Ti5443-C bits are for drilling conical holes. And from the bend in this bit, I would submit that this is actually a DeWalt Ti5443-C(i) bit, for drilling inverted conical holes, instead of the Ti5443-C(r) bit for regular conical holes. -dave |
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#19
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Re: pic: A "Bit" of a problem.
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Though the TiN (titanium nitride) coating isn't the greatest for aluminum and titanium, it does resist abuse rather well, and the pilot points are rather useful, so those DeWalt sets aren't a bad choice for FIRST use. You might be able to find TiCN (titanium carbon nitride) or TiAlN (titanium aluminum nitride) coatings that are more durable, and provide a little better performance in aluminum and titanium. TiCN and TiAln are actually more common on fancy endmills, than on drill bits, though. Even a black oxide coating is better than TiN, if you're only concerned with drilling aluminum (it won't stick as much to the chips). In any event, $7.00 for that bit doesn't make sense. For example, McMaster-Carr sells something broadly equivalent for $2.61. (Look at their online catalogue to see the selection of drills that you could use instead.) Check your phone book for a machine tooling supplier or industrial hardware store in your area; they'll be able to find you something better. Quote:
Last edited by Tristan Lall : 28-09-2007 at 17:51. Reason: More words. |
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#20
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Re: pic: A "Bit" of a problem.
I don't doubt our students can drill backwards, but a drill press that has no reverse can't(or can it?).
I'll have to remember what you guys said about the bits though. We only have some small sets right now and we were looking into buying a full drill index along with a handful of the bits we more commonly use. So I'll keep in mind what sort of bits we should be looking out for. |
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#21
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Re: pic: A "Bit" of a problem.
OH NOES!
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#22
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Re: pic: A "Bit" of a problem.
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whenever someone broke somehting you did feel really bad, but he always made a joke out of it so it was alright, and he was right too, as long as your not hurt everything is good ![]() |
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#23
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Re: pic: A "Bit" of a problem.
Thats amazing... When ever i do that it busts into a million pieces. Bummer.
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#24
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Re: pic: A "Bit" of a problem.
i know that during the build season last year a bet was bent at 90 degrees... i wish i had a picture, it was pretty wierd.
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#25
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Re: pic: A "Bit" of a problem.
Funny, yesterday we broke the pilot tip of my 1/2 from the same set. We were drilling through ~1/4 inch steel. DeWalt to...
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#26
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Re: pic: A "Bit" of a problem.
Wow... I never knew that was possible... how well do you think that would work on say.... a robot???
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#27
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Re: pic: A "Bit" of a problem.
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through the back side. The bit can grab as it breaks through, snapping it (or tweaking your wrist) if the drill has enough torque. Putting lots of pressure on it as it goes through can also cause you to lurch, putting a side load on the drill and bending the bit as shown in the picture at the start of this thread. Have fun, Eugene |
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