【加工動画38】回転センター研削/How to grind a live center

[@ぱんだなんだね]

nc旋盤工です。普段普通旋盤はあまり使わないのでとても勉強になります。 また、コメントから世界中からアクセスがあるかと推察致します。世界の旋盤技術向上に寄与されていることに心から感動します。私も世界に貢献するものづくりが出来るよう精進いたします。

[@SwaplampJapan]

ご視聴いただきありがとうございます。 また、嬉しいお言葉を下さり誠にありがとうございます。とても励みになります。 ゆっこゆ様もお体に気をつけて頑張ってください。

[@mmilspec.1763]

まずアイデアがすげぇわ… そしてそれを実現する技術力。

[@c2meechai]

Thanks for very good techniques ,clear steps,full of details,I’m a retired mechanic ,from Thailand.

[@dieterbuchner1214]

Perfect work! Now i have a reason to buy a used live center. Thank you for the video. Regards from Germany.

[@kisspeteristvan]

and you'll be surprised to find out it's a different design and this method won't work

[@ellieprice363]

@@kisspeteristvan Depends on which type he buys.

[@vnvnkb]

私も参考にして土日に片っ端から綺麗にしてやろうかと思います。 古くなったからとすぐ新しいの購入したかるので

[@jscott8695]

Great idea! To be honest though, I would never let my live centers get into that condition. I'm very careful with how much pressure is being applied to the work piece, etc. However, if a live center does get scored up, I will keep this in mind! Thanks for sharing!

[@ProstoMandrivnyk]

Perhaps, you're capable to make a wrist watch for ants. I admire this level of skills, huge respect!

[@nerokuwa4607]

So today I will write this one sentence: あんな作業が好きです。

[@ZlodieIzZaholustia]

Спасибо за урок, мастер! Отдельное спасибо за аккуратное отношение к станку, Вы закрываете от абразива его части!

[@stevegpsych68]

I've marvelled at your cleanliness (and skill) in another post but I think I have worked it out ..... This is the machinist equivalent origami 😉. Thank you for sharing.

[@davidjames1007]

Your work is always perfect and inspiring. Your working space is always as clean as an operating theatre. Thank you for sharing your knowledge and expertise.

[@serferinterneta]

Прекрасная работа. Так точно и красиво. Приятно смотреть. Спасибо.

[@edgarvicenterodriguez5437]

Lo felicito por su iniciativa, por aportar conocimiento y porque sus ideas facilitan el trabajo. Saludos desde Colombia.

[@mikediamond1522]

Very good but take another stone and dress the wheel everytime you chuck it up. Improves finish and smooths out any vibration. Mike

[@robertburns2415]

This is a stroker genius can't wait to try it on my machine

[@stxrynn]

Very nice! Beautiful result. And thank you for the instruction on making the belt! I was wondering how difficult that would be!

[@erlingurbjarnason5874]

It is so gratifying to see everything work out perfectly - and for the most part in stark contrast with one's own fumbling around the lathe. すべてが完璧に機能するのを見るのはとても喜ばしいことです - そしてほとんどの場合、自分自身が旋盤をいじるのとはまったく対照的です

[@Darkrif1957]

Another lesson for my studies thank you so much Swap Lamp

[@pauldavidson6321]

Did you consider using an o-ring for the drill drive belt?

[@胡士东]

好想学习他的的技术，好像拥有一套这样的设备，非常好的视频👍谢谢！

[@crashh9270]

Wouldn’t the oil on the tip of the tool instantly be removed by the friction and shavings and if so what’s the point?

[@AndrewSmith-qj5zv]

I wonder if some of the grit from the abrasive finds it's way into the live center bearing.

[@岩谷英俊]

なんか癒される。

[@tarehjernetarehjerne4082]

I love the grinding attachment you have. I have wanted to grind spindles for some time but i struggle getting the angles right. How do you do it?

[@SwaplampJapan]

Thank you for watching. Do you mean the angle between the grindstone and the grinding surface? The aluminum body of this die grinder and the whetstone are almost parallel, so I put the dial against the aluminum body of the die grinder and turned the handle to adjust so that the needle would not move.

[@mpetersen6]

I made two pipe centers for smaller lathes. #2 Morse Taper. Both had a Zerk fitting in the nose. Ran a socket with a universal in a collet engaged with the Zerk. Used that to drive the center. Cut the center cone in the lathe. One 60° included. The other 90° included. Used double row bearings.

[@mactec54]

You should have dressed the wheel once it was mounted in the grinder, and you will get a better finish

[@eduardocamji308]

Excelente y muy prolijo para sus trabajos, saludos desde Argentina.

[@samimas4343]

Is centring the grinder's height very critical? And does the center rotates the same direction as the grinder but slower?

[@SwaplampJapan]

Thank you for watching. The height of the whetstone should be adjusted accurately, but if it is even slightly lower, the whetstone will bite into the material, which is not good. So make it exactly the same height or slightly higher. The rotation of the center and the rotation of the grinding wheel are in the same direction, so the contact speed is faster. The die grinder can only be rotated clockwise, so the cordless drill driver is rotated counterclockwise.

[@HM-Projects]

Did you dress the stones separately ? Nice result

[@SwaplampJapan]

Thank you for watching. The stone was previously dressed.

[@KhackNerom]

Хорошая работа, сделано отлично. Вам бы камеру отдельно на штатив поставить. Такое чувство что вы крепите её на станке и из-за вибраций она постоянно пытается поймать фокус, из-за чего теряется резкость картинки в динамике.

[@よし-h9p]

勉強に成りました！😂

[@Marcelo-56]

Rectificado perfecto y efectuado con un método simple y creativo👍✅

[@harlech2]

Very nicely done. Nice restoration on that center.

[@RealNotallGaming]

9:30 nice video but 1) it doesn't matter to measure the tailstock, it is always in the centre, if it is not, it is because it is broken 2) you dont grind the tailstock, you lose the cemented layer and it continues to get damaged expecially with harder matarials, change it or after grinding it, send it for a heat treatment to regain the cemented part

[@masayoshifujishima998]

相変わらずおもろいよほんと

[@farouq1983]

Thank you for sharing. Respect from Iraq.

[@werschkowdennis6533]

Красавчик. Работа отличная. 👍👍👍 Здоровья тебе и удачи.

[@lonelyplanet1080]

That was super smart how you set up your equipment, awesome work 👍....thanks for the video

[@stringmanipulator]

I love your videos, they are so educational and at such high level. I have learned so much from your videos, thank you very much for sharing your knowledge.

[@kentuckytrapper780]

Excellent job, great video as always..

[@kingvailyon962]

I dont understand what the first part is for, I see you made the band to turn the Live center. But I am unsure why that was needed. Thank you for the video.

[@JathraDH]

The tip of the center is on a bearing so it spins freely. You couldn't simply put it in the lathe and spin the lathe because the tip would stop spinning once pressure was applied to it or it would grind unevenly.

[@kingvailyon962]

@@JathraDH Thank you

[@NRDavis-wl8vn]

Thank you for sharing Your Creativity! 😎

[@paulk3573]

Congratulations on this great demonstration. Do you have a link to purchase the grindstone? Best wishes. P.K.

[@SwaplampJapan]

Thank you for watching. I purchased it from Amazon in Japan. www.amazon.co.jp/gp/product/B002NAR77E/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Thanks for share! What is the cutting lub are you using there? thanks!

[@SwaplampJapan]

Thank you for watching. I use Castrol Variocut C210 cutting oil.

[@metriconejkt]

Good tool and style performance

[@dani-ohciao]

Wow, very good work. Regard from Italy 👏🏼👏🏼

[@userwl2850]

Great job.

[@vandalsgarage]

Proper job. Subscribed!

[@fernandodiasdasilva2624]

Maravilhosa mecânica parabéns forte abraço

[@magna750]

Beautifully done!

[@mpetersen6]

I used to have OD grind rotary bushing. Set up the bushing on a tapered arbor. Use a hose clamp with an allen wrench welded to the adjustment screw. Tighten the hose clamp. Setup so that the Allen wrench is keep the arbor from turning. Drive the outside of the rotary bushing with the driver on the head of the grinder. This way the body of the rotary bushing is turning on its own bearings. We also used to ID grind the inside of spindles for multiple drill heads. On a center in the headstock. You figure out how.

[@marchirestauracao]

ótimo trabalho, ficou perfeito.

[@davidswanson5669]

12:55 that’s so satisfying

[@normesmonde5332]

Wow you do some great projects

[@ManiacMitrandir]

Мозг инженера в действии: нестандартная задача - нестандартное решение, и блестящий результат!

[@malsoonsakit4786]

Top precision work

[@eugeneeman7710]

Your videos are superbly filmed

[@Canajaf]

Ottimo lavoro, dovrò farlo anch'io. 👍

[@ASD-ri5cv]

Отличная работа! Подскажите, что за камни вы использовали для шлифования? Дайте на них ссылку пожалуйста. Спасибо!

[@SwaplampJapan]

Спасибо за просмотр. Бруски (WA60) и (PA120). Купил в японском интернет-магазине.

[@PersMachinist]

Very precision machinist.

[@piteralvarado1028]

Exelente técnica amigo me gustó yo lo hecho pero desarmar el punto y centrar con el reloj y lo rectifico con la herramienta de corté pero así es mucho más precisó 🙏👍

[@joewhitney4097]

Great video Thanks for sharing.

[@kalleklp7291]

Yes! That's the way to do it when you are a pro and take good care of your tools. :)

[@PY2JV]

eu amo o seu canal ! fantástico !!

[@あっつぁん-w2s]

素晴らしい仕上がりですね ぜひこの加工のエッセンス 頂きたいものです

[@klazzera]

it's a pleasure to watch

[@Ihaveanamenowtaken]

Just fantastic!

[@christianpaulroldan4010]

Nice job and effort

[@jewelator]

Very warm comments! I join! I will also be glad if you rate my videos. In the last video, I made a ring with sapphires from a titanium pipe.

[@christianpaulroldan4010]

@@jewelator ill check that out if i dont forget 😅😅

[@jewelator]

@@christianpaulroldan4010 Thank you! I hope I don't disappoint.

[@christianpaulroldan4010]

@@jewelator where is that your video you're speaking?

[@user-ale7723]

عندما تجتمع المعدات الجيده بيد شخص عبقري يكون الابداع منقطع النظير 👍

[@СашаХаустов-с5у]

Такие работы надо показывать как эталонные👍👍👍

[@ktamen]

А сколько раз тьй видел такой вращающий центр? Для обьйчнйе центрьй етот метод не годится. Измерение биение неправилно, потому что не удалили ремень. Поищи канал Виктора Леонтиева, мастерство там на 3 порядока вьйше, там и увидиш как шлифоват всякие центрьй, а не только такие как в ето видео.

[@ХалилБабаев-й7ч]

Автор конечно 👍 хороший, но до эталона не дотягивает. Эталон это Виктор Леонтьев, советую ознакомиться с его видеоматериалом

[@asusy2772]

Nice work! How many rev/min does the grinder?

[@SwaplampJapan]

Thank you for watching. This grinder is rotating at 8300rev/min.

[@Alex-xv2vw]

Хороший пасик (ремень) получился!

[@kamalkhadra8838]

Fine 😉 and precise..

[@jasonhorrocks1336]

For not owning a grinder this is not bad. I do use grinders and would make work of this in minutes.

[@nightinthewhite3817]

the end result looked amazing but i feel like you "over engineered" this, the pulley could've been made from the bolt that was cut and the rpm reduced in the drill if, unless it is not of a variable speed which would be weird nowadays. Do not mean to say that it is bad, it is impressive what you've made, im just saying that you could've skipped many steps to achieve the same exact result

[@guzmanmedina1963]

excelente forma de rectificar

[@patriceaymard1399]

C'est très ingénieux, bravo.

[@nigel900]

Very nice. 👍🏻

[@muftahsulyman540]

Well done, friend

[@jewelator]

Very warm comments! I join! I will also be glad if you rate my videos. In the last video, I made a ring with sapphires from a titanium pipe.

[@AlexA-lt2lv]

Great job! What is the die grinder model number?

[@SwaplampJapan]

Thank you for watching. I machined the cylindrical part of this die grinder with a lathe so that it can be attached to a jig. This model is not normally used in this way. The model is Hitachi GP5V.

[@AlexA-lt2lv]

Thahk you for the information. Is it possible to use GP3V model for this job?

[@SwaplampJapan]

I think that it is all right. GP3V is a high rotation, low torque model of GP5V, so the applicable maximum wheel outer diameter is 25mm. GP5V is 49mm. The shape is slightly different due to the reduction gear, but the diameter and length of the aluminum part that is gripped by the jig is the same. I disassembled and cut by using the center hole of the spindle to capture the center at both centers.

[@DeadZoneCustoms]

Insane work!

[@alib.m618]

Professional 🔥🤩👌👌👌👌👌👌

[@VolodiJR]

Спасибо большое за идею ❤️

[@Tasarran]

Why drive it with the drill? Does the lathe spin too fast for this operation?

[@ijuppas]

Good work

[@jewelator]

Very warm comments! I join! I will also be glad if you rate my videos. In the last video, I made a ring with sapphires from a titanium pipe.

[@ijuppas]

@@jewelator ok sir. I'm also just learning to make a wood lathe video

[@jewelator]

@@ijuppas I'll take a look!

[@YooProjects]

I like your idea dear man 💫 waiting to see your next project 🙏

[@chrisyu98]

did you dress the stones?

[@SwaplampJapan]

Thank you for watching. Dressed once after purchase. I tried to hold it in the same place, but the pink whetstone was vibrating a little.

[@DursunX]

phenomenal tolerances. a pure joy to watch

[@Tankarmour1]

Brilliant! 👍🏻

[@wizardindustriesusa]

You Sir, have earned a Subcriber for life!

[@JP.SolitaryJourne]

120番からの、鏡面仕上げに入るかと思ったら違った😁

[@thedolphin5428]

Why not 600g and polish?

[@jorgbernhard3593]

ASMR !! Beautiful !

[@4FingerDP]

the production process of the pulley wheel is unnecessary complicated, if you have the stock, then turn down the pulley in one operation and thats it. no need to turn down bolts and making a strangly bad excentric pulley . i am sorry, but i would concider this good craftsmanship.

[@VINOGRA]

excellent !

[@matthewsimmons6831]

Looks superb

[@dimtt2]

I would also check the live center runout without the side force of the polyurethane belt. Just spin it with your hand. If the side force of the belt is significant and the live center bearings are not preloaded this grinding method can lead to a significantly out of round grind. This is what happened to me with a similar grinding setup

[@mooreevair]

so how would you go about preloading the bearings?

[@hibahprice6887]

@@mooreevair There must be a thrust bearing and nut, the mechanism must be tensioned, and not change position with the axial pressure of the belt. A good center will not deviate under a load of a couple of kilograms.

[@dimtt2]

@@hibahprice6887 My shitty quality chinese live center did not have a preload mechanism for the thrust bearing. It only got loaded when it was put in use. This is why I posted this comment in the first place, to inform others of the risk of grinding such a poor design live center without a measure to first preload the thrust bearing. I never really figured out how to preload the thrust bearing and at the same tine be able to grind the cone.

[@joshua43214]

@@dimtt2 You can't with the cheap ones. The cones are ground and then everything is assembled and you end up with runout equal to all the accumulated error. Good centers are very expensive for a reason.

[@randomtux1234]

0:07 nice ruler, where can i buy one?

[@SwaplampJapan]

Thank you for watching. I bought this CU-15KDF at Amazon.co.jp.

[@kknives_switzerland]

Very nice!!

[@Ironman9665]

Отлично👍