| Gallery, Projects and General > How do I?? |
| D Bits revisited |
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| Chuck in E. TN:
Andy I did just that. Mistake #1, I tried to harden the reamer in water, and didn't test it with a file. I tried reaming an 15/64" hole and distorted the reamer. I did ream a 'D' sized hole(.246") and it was a slip fit for another piece of drill rod, so I'm close. I also made a reamer with a beveled end and it worked better. I'll try again tomorrow with both styles, but hardening in oil and testing the hardness first. Thanks for all the input. Chuck |
| Fergus OMore:
I notice that you are 'shotgunning' again for advice from various fora. You'll get confused- and some of us peeved! The first thing is to see what total diameter that your set up gives. in other words, your bit of silver steel may be 0.250" but it may be cutting larger because of the inaccuracy of your chuck. So we don't know what THAT figure is- but that is the diameter that you will cut- and not 0.250" So you have to reduce your embryo D bit to the size that YOU want,. It is only then that remove the metal to half the cutting edge-- and then the nose edge of say 5 degrees. And remember that you don't fiddle about by taking the bit out of the chuck- to fiddle about with tempering or whatever. You stand a 100% chance that you will hit the wrong setting that you have eastablished with so much difficulty. I'd settle for grinding but other others may differ. This, however, is what a good tool maker will advise. ----------------------------------------------------------------------------------------------- Battle bowlers on, toothbrushes at the slope, kit bags will not be worn. Stand by your boots with your beds in your hand! :hammer: Norman |
| Chuck in E. TN:
Well, Norman, I can ask for advise, but I don't have to take it. I often get quite a chuckle from some of the responses I get. I firmly believe that the wider exposure my question gets, the more likely I'll get a response that I can understand and implement.I usually remember to thank folks for their input, wether I utilize it or not. Forgive me all if I do forget to thank you. I ask questions to get an answer, as the often quoted "The only dumb question is one not asked..." says. I have to sepatate the usefull (to me) from the crap. Folks of all experience levels and background are on several forums, and I would feel I was missing something if I didn't avail myself of that variety. I learn best by hands on experience. I don't have anyone near me that can show me how to do something, so I must rely on a variety forum explanations to get the 'light' turned on. To each his own... Don't take it to hard, I won't be upset if you don't respond to my questions. Enough said. Chuck Chuck |
| 75Plus:
Chuck, here are a couple of posts that may be useful. I knew that Bogs had posted something about "D" bits but it took a while to find it. Unfortunately he has removed all the pictures. http://madmodder.net/index.php/topic,2265.msg23824.html#msg23824 http://madmodder.net/index.php/topic,2312.msg24257.html#msg24257 Joe |
| Chuck in E. TN:
Thanks for the link, Joe. I read that post when it was current and even coppied it to a word document to save. Unfortunately, I stored the only copy on a usb hard drive and it has died! Lost several years of data with that crash. John(Bogs) has moved to another forum and possibly could be persuaded to repost the thread there. I save stuff like that even if I don't use it for a while. Thats the case with my quest for info on D bits again. I had the info, didn't use it, lost it, and now need to make a D bit. Chuck edit: John(Bogs) has actually contributed to a thread on D bits on MEM |
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