Broken Tap Removal by Metal Disintegration Machine (MDM)

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Published 2013-04-06
Tom Grafton of Jerry's Broken Drill & Tap removes a broken tap from a heavy industrial cast iron part. A Metal Disintegration Machine (MDM) or Electric Discharge Machine (EDM) was used to successfully disintegrated the broken tap saving the customer thousands of dollars. The broken tap didn't have a chance!

This is how to remove a broken tap the right way.

All Comments (21)
  • @jackkrinkov9273
    He probably doesn't remember me but i brought him a firearm part with a broken tap in a threaded hole. I asked him how much and he said $50 and come back on Monday (it was Fri morning). So I said " What if I gave you a hundred bucks?" And he says "come back in an hour and it will be finished." So anyways He did a fine job fixing my gun part and we BS'd for about half an hour about guns and offroad riding . Really a cool guy.
  • @psiewert83
    I find it shocking that there are enough broken taps in the world to keep a private business open. That's amazing.
  • What a cool dude! Could watch and listen to him all day. Notice how well spoken he is, no erms or ohms between words. A wise man with a focused mind. Excellent video, was enjoyable and educational at same time.
  • @TorqueTheRich
    As a 40-year Journeyman Tool & Die Maker, that was very satisfying to watch.
  • @pssst3
    Love watching a skilled artisan at work
  • @sygnusadun4832
    That was an absolute pleasure to see in action. Not nearly enough proper machinists left out there who can still use these kind of tools.
  • @opforind
    Removing broken taps, drills and stripped bolts was my favorite thing to do when I worked in a machine shop. It was a nice break from running production jobs that never seemed to end and you really felt like you had accomplished something and saved the company some money by fixing a part that would have been scrapped.
  • @dtThurman
    I was a machinist in a factory for ten (10) years circa '67--'76 and somewhat perfected a process of removing broken taps other maintenance techs had broken. I only had small high-speed steel chisels, such as Tom mentioned made of M2 steel. Later I went to work for another company who brought in an EMD machine. Once the factory tech showed me what it would do I almost hugged him. When you work with "bull work" mechanics an EDM machine pays for itself quickly.
  • @scootergem
    That calm voice and demeanor makes me think that he can do about anything! Great vid.
  • @MaturePatriot
    I didn't realize there was that much demand to remove broken taps. From the looks of that casting and the work that had been put into it, you saved them a ton of money. Great work Tom Grafton. You keep chewing your gum, to heck with the boo birds.
  • @MrShobar
    Thanks, Tom, for a fine demonstration of old-school, pure unadulterated know-how.
  • @danokerr9929
    As a professional and home machinist. The whole process of conventional edm and wire edm was a very hard thing to master for me. It takes skill and knowledge to do this right. I used to take taps out using graphite and trode holders. Never a dull moment
  • @mark5862
    Hi there! I remember sending you a part (model steam locomotive frame) about 8 years ago to have a #5-40 tap removed. Great to see you on youtube.
  • @danhalfhill9169
    Ah, great to see that there are still some old-school machinist folks still out there! It’s the end of a great era....
  • @nlo114
    Good demo. We have a guy near me called 'The Thread Doctor' who travels around garages and workshops doing in-situ work like that, high quality job, with a high-quality price. He has saved a lot of engine castings from being scrapped, so well worth the money.
  • @voxellab4339
    WOW what a natural teacher. Everyone who wants to make instructional videos should follow Jerry's example in HOW TO.
  • No by guess or by gosh, or scratchin' your butt. Just methodical steady progress to success. I love to watch a pro work. Even in my little town of 3,000 people, I swear there is $50,000 of outboard motors sitting idle for broken off bolts. If you ever come to the Gulf Coast, bring your machine. LOL Thanks for a good, clear video.
  • @johnerway7255
    Great job Jerry, seen this done in the early 70's, always interesting to see this special work completed. Thanks
  • @xenonram
    I had no idea that many people were breaking brook buys and taps to have such a highly specialized company in operation. Who know someone could make a living doing this. Amazing.