I have several carbide end mills that I have personally broken myself with no help from anyone. I have taken extra effort to learn nothing from anyone so I can continue my career as a professional carbide end mill breaker. 😂 Great video. I really like your approach to solving small problems that people might encounter in their home workshops.
Ein Problem, das so alt ist wie es Menschen auf der Erde gibt: Werkstücke in Drehfuttern zentrisch zu spannen... Rustinox bietet in seinen Videos Lösungen an. Und das auf sehr sympathische Art und Weise. Gut gemacht !
Hi Rusti, great end result, unless you are gripping a diameter that is exactly the same as the ground diameter in the Jaws (as original), you will only achieve line contact, having flat jaws also achieves line contact so no real reduction in gripping surface. Years ago, I used to use a machine that was all flat jaws with no serrations (3 & 4 Jaw), they worked just as well but left no marks in the part. Cheers, Jon
Small dia work needs less compression to hold. Large diameter work does benefit from having 6 gripping edges rather than three. That’s why jaws are made that way.
Keith from Michigan. I wish to say, year 2023. Last year I had intended to at least get something built / machined. Ah heck I'm pretty tooled up, and work on one of the kits. I bought, but my back surgery, plus having a new complete set of teeth. Those items have somewhat set myself behind. Anyway Keith wanted to say good 2023 and please forward sending your videos, thanks...
Thanks Michel. I have the same issue with my large 4 jaw chuck. I've already tried grinding the jaws in the lathe with a pneumatic die grinder. I put the preload on the jaws using a cnc machined ring with pockets for the jaws. It was a ton of work and the end result wasn't much better. I think I'll try your method.
Great to have you back in 2023. See you fixed the oil can tip over the Holidays :)> too! Next time I use my lathe, will check the jaws first thing. Great results Michel. Bear.
That Michel worked very well sir! And your solution was way out of the box! I probably would never have thought of that way to do it. That 4 jaw chuck looks pretty new, and doesn't say much for the quality control of the manufacturer lol remind me never to buy one of their chucks lol Cheers from the UK
I had a Lagun milling machine years ago that I would set up for occasional surface grinding work. I would set my table feeds to automatically reciprocate and cover the ways and table to protect against the grinding dust. Worked great. For recutting the jaws carbide cutters are the best for that. Thanks Rustinox for showing us this.
Considered this approach but instead grinding with a radius wheel but now am planning to go the hard turning route (CBN) as demonstrated by Rob Renzetti. I personally like to keep a radius on the jaws. I have developed a product dubbed a 'preloading ring' which will work on any chuck, independent or self-centering. It's fairly cheap and fast way to get the job done. Currently documenting it on my website and will share in due time. Cheers from Holland.
Problem is that the chuck isn't old at all by the looks of it. It's clean and still clean looking steel like it was machined yesterday and that's all over the chuck by the looks of it. Poor quality control letting a chuck out of the factory with wobbling jaws!
Only recently ive heard about a shaper machine and soon afterwards saw 1 on RU-vid and i happen to find it quite interesting. Yet have to experience one for real. Im a hobby machinist due to hobby model railway. The shaper, judging by videos ive seen seems to be quite versatile.
@@Rustinox hope you will enjoy a video series on RU-vid presented by Joe Pieszinski from Texas(Advanced Innovations) where he has machined vintage model of such a machine. The machine is hardly bigger than most cellphones by dimensions. For me thats where i came to know about a shaper
Very interesting video: you can cut the hardened jaws steel with solid carbide end -mill? Because i have in mind a project and you did a part of that in case! 😀 ATB Michel, ciao from Italy, Alberto
@@Rustinox Thx Michel, that next step was to tap the hole, you had tried to tap on hardened steel? Or will i broke at 100% ? The idea Is the drill and tap the 3 jaws of My Chuck!
Great video! I have a 4-jaw chuck with bell-mouthed jaws.....have been wanting to fix it for years. Grinding/hard turning a 3-jaw appears to be a lot more straightforward. I like your method. Thanks
I've had some of those carbide milling cutters that just seem to break their teeth at the slightest bit of work! 😐 Thanks for sharing the issue and solution, I will have a look at my 4 jaw next time it's out to see if mine is suffering the same issue.
Hi Rusty .. Happy & Prosperous New Year 2023 to you & Yours. This is a very good video of how to repair or modify jaws for your lathe, as you showed immediate results to what you were try to achieve 😀 😉
Great video. I did have a thought though. What if the jaws were bell mouthed? The majority of the length might have been good with only the front letting you insert the feeler gauge. Having said that you did get good witness marks in your final clamping test.
Hello Michel, an excellent job, as we have come to expect. Not trying to be a "smart Alec" but in English the pronunciation of "jaw" is like it rhymes with door or more . Jaw, door, jaws, doors. I must add that your English is ten times batter than my mastery of any foreign language so you must take this as friendly helpful advice and in no way any criticism. All the best, Mart in England.
