How to make an ER20 Collet holder. which can be used in the cutter grinder, 3 jaw chuck, tail stock or drill press. Screw cutting, turning a tapered bore, polishing the bore and more tips.
Hello Alan Need to make one of these as well. Always wondered about that Taper. Need to read and check up on that, a little more. However, seeing U doing this makes it so much easier, simpler and all the more possible. What we feared was only our own ignorance !! Will "get 'er done" - like The Man Says !!! Thanks for showing and sharing ATB aRM
lovely job here's my 2p's worth grind your parting off tool the other hand so the leading edge is tapered towards the left (tailstock) so the part that you part off doesn't have a bur left on it this comes in very handy if your making shims which are hard to debur
Второе замечание - такие детали чтобы не было биений надо точить за один проход, не переставляя заготовку. Интересно было бы зажать этот патрон в токарном патроне и померить индикатором биения, что-то мне подсказывает что они будут и не маленькие. Хотя для тех целей что показано на видео - заточка инструмента, можно было и сверлильный патрон применить ;)
Ну он может руку набивает, хотя в общем правльно приметил, цанги это прежде всего точность, все часовые станки на цангах работают, а тут перестановки, с резьбами не понятно. Но в отличии от патрона они будут удерживать намного лучше.. хотя тоже сомнения для данного варианта, а надо ли это..
Thinking about it having worked on fitting an ER40, when you were talking about not pushing the collett too hard otherwise it would spring out of shape may I suggest inserting a very accurate bar or expanding arbor so that it retains the correct angle. Cheers
I made a collet chuck once. Used it a few times and the inside got damaged considerably by the hardened collets. In other words. You need to harden your work piece.
Not sure why you had damage. If all fits together as it should, there is no movement to cause damage. I have made my own ER32 holders in round, square and hex mild steel and have no detectable wear, let alone damage. Check your fit and taper, and no need to over tighten. 25 FT pounds max.
Hi The cutter grinder is a kit from hemingwaykits.com. See my video making a tool and cutter grinder It shows what you get in the kit. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UvubIfmWaIw.html
Thank you Alan. Such a fabulous kit. I will certainly look into this as well as your video. I currently have a Taylor Hobson cutter grinder that is in need of tlc. I need to weigh up whether to spend time and money fixing the Taylor Hobson or perhaps go for a Hemingway kit. Thank you for the inspiration. I am a total novice, loads of enthusiasm. Now to put that into practice.
Странно что автор не сделал ни захода ни схода для резьбы. На стандартном патроне они есть... А так познавательно, хотя я не понял как точно выставили угол для точения внутреннего конуса?
