DDSBYDAY Posted May 26, 2010 Report Share Posted May 26, 2010 I have looked and researched for the longest time to find a miniature trephine bit. We use them in Dentistry to remove implants from bone(huge $). It is simply a hole sawblade. I wanted them to alter the hook eye slot in the aluminum mold and to add hook eye slots in other areas of pre existing molds. I have had to do it free hand and it works but not as clean as I would like. I purchased this set on ebay today for 10$ and at this moment am excited. I have a bunch of molds in a box to have minor machining done but if these work I will be a happy camper. Anyone ever try anything like this on aluminum? They are coming from china so I won't get them for a couple weeks. If anyone else is interested in the results let me know and I will keep you posted. The outside diameter is listed on the bit. They run from 3-12mm. Quote Link to comment Share on other sites More sharing options...
onlybass Posted May 26, 2010 Report Share Posted May 26, 2010 Machinists call/spell them as trepanning tools. That might expand your results. Look for hss (high speed steel) tools. Just in case, you never know with the China stuff... Quote Link to comment Share on other sites More sharing options...
Richard Prager Posted May 26, 2010 Report Share Posted May 26, 2010 I've used similar bits for jewelry making http://www.riogrande...=Specialty+Burs Quote Link to comment Share on other sites More sharing options...
DDSBYDAY Posted May 26, 2010 Author Report Share Posted May 26, 2010 Machinists call/spell them as trepanning tools. That might expand your results. Look for hss (high speed steel) tools. Just in case, you never know with the China stuff... A trephine (pronounced /trɨˈfiːn/) is a surgical instrument with a cylindrical blade. It can be of one of several dimensions and designs depending on what it is going to be used for. They may be specially designed for obtaining a cylindrically shaped core of bone that can be used for tests, cutting holes in bones (i.e. the skull) or for cutting out a round piece of the cornea for eye surgery. I just want to cut a small clean circle with a raised core. Thanks for your suggestion on the spelling. I will check that out. I'm sure we are talking about the same thing just a different hole to be drilled. Quote Link to comment Share on other sites More sharing options...
Fatman Posted May 26, 2010 Report Share Posted May 26, 2010 After you get em and try em post back with photo's of how they worked for you!!!!!! Fatman Quote Link to comment Share on other sites More sharing options...
onlybass Posted May 27, 2010 Report Share Posted May 27, 2010 I just want to cut a small clean circle with a raised core. Thanks for your suggestion on the spelling. I will check that out. I'm sure we are talking about the same thing just a different hole to be drilled. Yep, cuts the same way...cuts around a core "clean", unlike a hole saw (sometimes mislabled as trepanning tools) that has a pilot in the center. Same style of tools, there's about three common spellings. Quote Link to comment Share on other sites More sharing options...
Fatman Posted May 27, 2010 Report Share Posted May 27, 2010 If it works by the way of your description I might have to get some myself. Some of the smaller size jig heads in the Do It molds really need a longer eyelet hole when using the Matzuo sickle hooks. They would work way better with a bigger cut hole. Fatman Quote Link to comment Share on other sites More sharing options...
DDSBYDAY Posted May 28, 2010 Author Report Share Posted May 28, 2010 If it works by the way of your description I might have to get some myself. Some of the smaller size jig heads in the Do It molds really need a longer eyelet hole when using the Matzuo sickle hooks. They would work way better with a bigger cut hole. Fatman That is what I am looking for. I also want to add stinger hook and swivel attachments to some of my molds. I have tried to do this free hand and usually have to line my cut out eye with JB weld to keep it clean. My goal is to make these minor adjustments without going through a machine shop or just ending up with a divot and having a lot of flash around each hook eye. I will take some pics and report on my findings. Quote Link to comment Share on other sites More sharing options...
Fatman Posted June 11, 2010 Report Share Posted June 11, 2010 Just wanted to check and see if you'd received them yet and had a chance to try them???? Fatman Quote Link to comment Share on other sites More sharing options...
