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    Form grinding a straight flute carbide drill.

    Sorry for taking so long for an update my boss fought me tooth and nail about the drill and we kept trying it his way. I eventually got fed up and went behind his back put the radius on the drill myself with a diamond file and the comparator and it worked perfect. Ended up with me getting a pat...
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    Form grinding a straight flute carbide drill.

    The tolerance on the diameter of the hole is pretty big the tolerance on the full diameter depth of the hole is like a mile. There's no need for a reamer. Thank you everybody for all of your help and thank you for that awesome PDF file with all the information on drills. I only have a few years...
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    Form grinding a straight flute carbide drill.

    mhajicek you got to shove a bunch of dental mold inside and stir it around for a minute or two to get all the air pockets out. Then Jam a pair of tweezers in there pull it out and hope for the best. Then you check it on the comparator.
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    Form grinding a straight flute carbide drill.

    I'm not sure either. He seems to think that the hole is non functional because the hole is in the threaded shank. Since we make a lot of assemblies that mentality of knowing what you can get away with is taken with non assembly parts as well. But we unfortunately I am limited on what I can work...
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    Form grinding a straight flute carbide drill.

    So at the very least we could send a Cobalt drill out and have the radius ground into the corners? And it would work?
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    Form grinding a straight flute carbide drill.

    It absolutely wouldn't surprise me if it did have it in the price tag
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    Form grinding a straight flute carbide drill.

    I'm making the part on a lathe I don't know why it needs a .060" radius going into the 118°. The part is some sort of linkage rod end for the launch bar of an f-35. I have to make about 150 of them and I have the capability of using through coolant if I had a through coolant drill but my boss...
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    Form grinding a straight flute carbide drill.

    So I'm currently running into a new problem at work where I am drilling an ID of a part with a fairly large tolerance of .330-.350 and a full diameter depth of 2.110"-2.170" and the blueprint calls out for a 114° to 122° drill point at the bottom of the hole. The material is 15-5ph heat treated...
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    Small boring bars with no flats alignment?

    What would you do if your boss hands you a carbide boring bar without a flat and tells you to grind a flat on the shank?
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    Clamping Inconel parts to a fixture with tailstock pressure.

    And seymore that would be worth a shot if the gun drilled hole wasn't running out .010"-.015" on some parts. Which it's just another nightmare I get to work around today
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    Clamping Inconel parts to a fixture with tailstock pressure.

    No Doosan sets the standard for their bottom line machines at 100#-300#. I'm so sick of Doosan
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    Clamping Inconel parts to a fixture with tailstock pressure.

    Hello all. I'm making some parts out of 718 that come to me as .625" x 3.600" bar with a .350" hole gun drilled through the center. First op machines a tube port with an OD of .565", an ID of .450", and a depth of .360". Second op clamps on that port with a collet and uses the tailstock and a...
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    Maraging 300 Steel, thin steel part, need some thoughts

    Actually sorry don't clamp unclamp. The part I made today you have to do that. Not this other thin one.
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    Maraging 300 Steel, thin steel part, need some thoughts

    We make a part very similar. Out of 6061. But it has a smaller diameter. We rough it out tailstock to chuck to the smallest diameter we can that it doesn't flex. Then retract tailstock and re-advance it. When advancing the tailstock you have to hold the pressure valve and turn the pressure all...
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    A286 Drilling question

    I'm currently having to drill .125" hole 1.600" deep in A286. I'm using a Guhring carbide jobber uncoated. (Because that's what my boss bought me.) I was at 375rpm and feeding at .002" per rev taking .015" pecks. I'm currently getting about 10-15 parts per drill. My boss wants me to get more so...
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    Machining rings out of high tension aluminum.

    Woodchuck is that on OD or ID collet? It would work but I don't see any advantage over using pie jaws due to lack of rigidity
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    Machining rings out of high tension aluminum.

    Wmpy that's a great idea. David N I'm using aluminum pie jaws. What we ended up doing for this time is leaving .025" on the ID and we're gonna finish bore on a machine with lighter clamping pressure while clamping on the full .500" OAL next time we make this were going cut the blanks .250"...
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    Machining rings out of high tension aluminum.

    David N that is a great idea. How do you part off the rings without dinging them when they fall?
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    Machining rings out of high tension aluminum.

    Thank you all for the replies. I agreed machining the part at once while clamping on extra stock is the way to go. Unfortunately the blanks are cut already. We can cut them longer next time or even use rolled stock with most of the bore already gone. But I have to try to save this material. Do...
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    Machining rings out of high tension aluminum.

    Hello all I'm new to the forum and my name is Jon. Im only a few years into the industry and work at a training aerospace shop. We don't have engineers. I turn a lot of heat treated 7075 aluminum and a lot of aluminum nickel bronze. The reason I am here is because no one at work has an answer to...
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