Pete Posted September 10, 2019 Share Posted September 10, 2019 Oh these engineers are so smart... NOT I get to drill a .020 hole at a 45 degree angle... sure no problem 🙄 Quote Link to comment Share on other sites More sharing options...
Pete Posted September 10, 2019 Author Share Posted September 10, 2019 Quote Link to comment Share on other sites More sharing options...
Platinum Contributing Member Skidooski Posted September 10, 2019 Platinum Contributing Member Share Posted September 10, 2019 Looks good on paper Quote Link to comment Share on other sites More sharing options...
Pete Posted September 10, 2019 Author Share Posted September 10, 2019 Just made a drill extension cause the drill is shorter than the distance I need to go 1 Quote Link to comment Share on other sites More sharing options...
Carlos Danger Posted September 10, 2019 Share Posted September 10, 2019 I have a few jobs where a hole needs to be drilled at an angle like you have through a Cobalt bushing to a depth. The solution is hardened drill bushings press into a small fixture. It gets rid of the side loads on the drill and gives you location control. 1 Quote Link to comment Share on other sites More sharing options...
Zambroski Posted September 10, 2019 Share Posted September 10, 2019 3 hours ago, Pete said: Oh these engineers are so smart... NOT I get to drill a .020 hole at a 45 degree angle... sure no problem 🙄 Ha...I had a set of those with a little tiny hand drill for drilling out jets on motorcycle carbs. PIA. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 10, 2019 Author Share Posted September 10, 2019 5 minutes ago, Carlos Danger said: I have a few jobs where a hole needs to be drilled at an angle like you have through a Cobalt bushing to a depth. The solution is hardened drill bushings press into a small fixture. It gets rid of the side loads on the drill and gives you location control. cobalt? oooffff Great idea.. just too much work for one hole lol I was able to use a end mill to make the 1/8th bore then used a tiny center drill to provide guidance then I was able to use my drill with the extension. came out spot on. Thanks for the idea Quote Link to comment Share on other sites More sharing options...
Carlos Danger Posted September 10, 2019 Share Posted September 10, 2019 2 hours ago, Pete said: cobalt? oooffff Great idea.. just too much work for one hole lol I was able to use a end mill to make the 1/8th bore then used a tiny center drill to provide guidance then I was able to use my drill with the extension. came out spot on. Thanks for the idea Seems like everything I work with is made of unobtainium. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 10, 2019 Author Share Posted September 10, 2019 5 minutes ago, Carlos Danger said: Seems like everything I work with is made of unobtainium. lol. that's some tough stuff lol Quote Link to comment Share on other sites More sharing options...
hayward Posted September 10, 2019 Share Posted September 10, 2019 4 hours ago, Carlos Danger said: I have a few jobs where a hole needs to be drilled at an angle like you have through a Cobalt bushing to a depth. The solution is hardened drill bushings press into a small fixture. It gets rid of the side loads on the drill and gives you location control. I'm not following, but if you ever get a chance, I'd like to see a pic of what you're talking about. Quote Link to comment Share on other sites More sharing options...
Carlos Danger Posted September 10, 2019 Share Posted September 10, 2019 1 hour ago, hayward said: I'm not following, but if you ever get a chance, I'd like to see a pic of what you're talking about. Yea I can't really show you pics of work fixtures. Drill bushings can be bought in different holes sizes that are just a tad bigger than the drill being used. The advantage is they are a high enough Rockwell number as to wear out the drill rather than allow the location of the hole to be moved or worn out of spec. 1 Quote Link to comment Share on other sites More sharing options...
hayward Posted September 11, 2019 Share Posted September 11, 2019 4 hours ago, Carlos Danger said: Yea I can't really show you pics of work fixtures. Drill bushings can be bought in different holes sizes that are just a tad bigger than the drill being used. The advantage is they are a high enough Rockwell number as to wear out the drill rather than allow the location of the hole to be moved or worn out of spec. I think this is what you're talking about? Now how the hell is Pete doing this on a 45 angle though? I should'a taken machining in high school instead of sitting through all the worthless classes of shit I never needed so far in life. Quote Link to comment Share on other sites More sharing options...
Carlos Danger Posted September 11, 2019 Share Posted September 11, 2019 13 hours ago, hayward said: I think this is what you're talking about? Now how the hell is Pete doing this on a 45 angle though? I should'a taken machining in high school instead of sitting through all the worthless classes of shit I never needed so far in life. One of the fixtures I made is for putting a stake pin in the center of bushing at an angle of 30 degrees. The bushing is only .200 thick and the hole in the center is only 3/8 or .375. the pin has to be on center line +/- .005 and the depth of the hole is .120 +/- .010 as any deeper makes the drill go out the side of the bracket which makes it junk. So the drill is .051 and the bushing is made of Cobalt which is not exactly the cotten candy of materials. Without replaceable drill bushings it would be impossible. Simple fixtures may have a dozen or more bushings for drilling broken bolts out of a bolt pattern. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 11, 2019 Author Share Posted September 11, 2019 13 hours ago, hayward said: I think this is what you're talking about? Now how the hell is Pete doing this on a 45 angle though? I should'a taken machining in high school instead of sitting through all the worthless classes of shit I never needed so far in life. The first thing I used was a 1/8" endmill. An endmill is very rigid and allows me to plunge cut at a 45 degree angle without deflection. That leaves me a flat bottom to drill the tiny hole through. Now if I had a 100 of these to do the drill bushing fixture would help to provide accurate repeatable hole locations. Quote Link to comment Share on other sites More sharing options...
ford_428cj Posted September 11, 2019 Share Posted September 11, 2019 Sinker EDM Quote Link to comment Share on other sites More sharing options...
Carlos Danger Posted September 11, 2019 Share Posted September 11, 2019 23 minutes ago, Pete said: The first thing I used was a 1/8" endmill. An endmill is very rigid and allows me to plunge cut at a 45 degree angle without deflection. That leaves me a flat bottom to drill the tiny hole through. Now if I had a 100 of these to do the drill bushing fixture would help to provide accurate repeatable hole locations. For a single part you went the right way. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 11, 2019 Author Share Posted September 11, 2019 5 minutes ago, Carlos Danger said: For a single part you went the right way. Thank you. Ill be getting a different version of it soon im sure. Research work is challenging Quote Link to comment Share on other sites More sharing options...
Pete Posted September 11, 2019 Author Share Posted September 11, 2019 25 minutes ago, ford_428cj said: Sinker EDM not for polycarb lol Quote Link to comment Share on other sites More sharing options...
ford_428cj Posted September 11, 2019 Share Posted September 11, 2019 2 hours ago, Pete said: not for polycarb lol Ahhh ...drilling it should be fairly easy then. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 11, 2019 Author Share Posted September 11, 2019 9 minutes ago, ford_428cj said: Ahhh ...drilling it should be fairly easy then. .020 hole at a 45. yeah it was easy lol Quote Link to comment Share on other sites More sharing options...
ford_428cj Posted September 11, 2019 Share Posted September 11, 2019 5 minutes ago, Pete said: .020 hole at a 45. yeah it was easy lol I would have bumped it up to a 1/32 drill. C'mon - doesn't get any easier than plastic (for the most part). Quote Link to comment Share on other sites More sharing options...
Pete Posted September 11, 2019 Author Share Posted September 11, 2019 33 minutes ago, ford_428cj said: I would have bumped it up to a 1/32 drill. C'mon - doesn't get any easier than plastic (for the most part). from .020 to .031? Not what the engineer wanted. wants it even smaller down to .010. smallest I have is .013 Quote Link to comment Share on other sites More sharing options...
ford_428cj Posted September 11, 2019 Share Posted September 11, 2019 41 minutes ago, Pete said: from .020 to .031? Not what the engineer wanted. wants it even smaller down to .010. smallest I have is .013 Yea - we adjust (gamble) a fair amount on stuff like that. That for some type of air bearing & why they want it so small? Quote Link to comment Share on other sites More sharing options...
Pete Posted September 11, 2019 Author Share Posted September 11, 2019 (edited) 57 minutes ago, ford_428cj said: Yea - we adjust (gamble) a fair amount on stuff like that. That for some type of air bearing & why they want it so small? Injecting air and water into a .010 wide channel over a 6” distance. Working on fuel cells ill get kids and professors coming in for ridiculous requests like this and I’ll say damn that’s tiny. Can I make it twice as big? And there answer is sure what the hell. Really? Jesus But this professor knows his shit so I try to do what he asks even if it is damn near impossible with a Bridgeport. Can’t use the quill as there is no feel with a .020 drill Edited September 11, 2019 by Pete Quote Link to comment Share on other sites More sharing options...
ford_428cj Posted September 11, 2019 Share Posted September 11, 2019 29 minutes ago, Pete said: Injecting air and water into a .010 wide channel over a 6” distance. Working on fuel cells ill get kids and professors coming in for ridiculous requests like this and I’ll say damn that’s tiny. Can I make it twice as big? And there answer is sure what the hell. Really? Jesus But this professor knows his shit so I try to do what he asks even if it is damn near impossible with a Bridgeport. Can’t use the quill as there is no feel with a .020 drill Ahh gotcha! Most of the time we are in a machine with the job & the machinist is struggling, or finds out we don't have that size drill etc in house. Customer would take too long to get an answer from, or I don't want to bother them - so I just have them bump up to the next size or whatever ...if I have an educated guess on what it is for anyway. You set it on a sine plate? Quote Link to comment Share on other sites More sharing options...
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