Cord to Cordless 18V Brushless Angle Grinder Conversion

I bought this tool from a japan recycle shop. It does not work properly. There is something went wrong with the armature and field. It starts to heat up after running, then more and more smoke comes out. Suddenly I knew it was gone. To fix it,​ I need to rewind an armature and field again, but I want to use it with batteries rather than electricity. I spent more than a week to do this project, finally I can do it, and you can see it is in this video.
I hope you find this video useful and enjoy it!
Furthermore, I am happy to receive feedback, suggestions to improve myself.
!!! I'm sorry for the mistake if I did in this video !!!
Thank you very much for choosing to watch my video!
Have a nice day
Gear Show

[@yakine13]

That's actually quite dangerous to have a difficult to reach push button. Usually those devices on battery have two buttons, one of them is a trigger that must be pressed for it to keep working. If not... Good luck catching it when it falls...

[@racing_mntage1584]

This.

[@SororYoussef]

what did you build ??

[@madvelila]

@13:23 That bearing was onstalled incorrectly. The friction was on outer wall and you pressed in from the inner wall. Therefore the force has to transfer trough those ballbearings. Ballbearings will damage the groove where they should rotate if pressed sideways like you did.

[@Fred-ch2um]

Creo que el tío si sabe lo que hace

[@danishkhan4085]

Wow beautiful nice

[@luisleandro7810]

Estoy de acuerdo contigo y también advertí ese detalle

[@dawdawsd1]

yes, that is not the only one. all installation bearings with a press was done incorrectly

[@BbBbb-xo5de]

ធឈធឈឈឈឈឹ។ឹយី៉់ឹ៍ពររីរិ័

[@michaelmitchell1496]

I enjoyed watching you rebuild that grinder the way you did

[@andreykuznecov9635]

Всё сделано классно, за исключением трех моментов. Нельзя запрессовывать подшипник за внутреннюю обойму, статор мотора должен фиксироваться к корпусу надёжно, иначе его будет проворачивать и кнопку с фиксацией на такие инструменты ставить нельзя, это очень опасно.

[@BlackCoupe-s5s]

Согласен с вами. Тоже об этом подумал,кроме статора.

[@СергейВоробьев-щ6у]

а тот факт, что чувак отпилил провод ножовкой))) ... Да и по стоимости эта болгарка ему по любому вышла на порядок дороже средней по стоимости бесчеточной аккумуляторной болгарки)) Ах. да, двигатель у него в другую сторону на тесте крутился

[@CrazyMan00700]

а вас не смущает тот факт что два новых двигателя,плата,акб,зарядка выходит дороже новой ушм ? 😂😂😂

[@rogerjolly30]

Чё вы тут все ноете? да всем насрать особенно автору он за просмотр этого ролика на две новых ушм давно заработал.

[@Karimula80]

​@@CrazyMan00700зато у него в ушм 2 новых двигателя значит 2раза мощнее должно быть

[@science7542]

the fact that you made a more powerful motor out of two smaller ones is extraordinary.

[@mihkus]

How is that more power if the controller has fixed output current? It lost power because the windings are now rated for ~2x higher voltage...

[@engenhokas69]

@@mihkus no they not, he used thicker wire to compensate for longer turns. and yes, motor size gives you the torque that he needs to do his work. What he lost is the KVA of the engine, 1000KVA is 1000RPM per given volt, now with lower resistance you will need more voltage to achieve the same RPM as before, but then again he gained torque and that's more usefull here that even more RPM, it's good as is.

[@Maungateitei]

What T H!!!! Why you think box of stupidly delicate electronic rubbish better than brush and armature that last lifetime. Be much easier and better result if you convert to low voltage brushed dc motor.

[@matejgamingandotherstuff6484]

@@engenhokas69 you probably got education from indian youtube videos

[@engenhokas69]

@@matejgamingandotherstuff6484 you just decided to just talk garbage, or it just fell out of your butthole?

[@chris746568462]

Not really sure i like the way the bearings were pressed but the overall project and the fact you wound the motor is impressive.

[@BDFireFist]

I also agree with you about the bearing part man, it ain't very good for the them to be pressed that way, the should be pressed from the outer walls.

[@AdamDitheridge]

Yep....always press a bearing in using the outer race..... But brilliant project none the less.

[@Maungateitei]

What T H!!!! Why you think box of stupidly delicate electronic rubbish better than brush and armature that last lifetime. Be much easier and better result if you convert to low voltage brushed dc motor.

[@maryboyle5515]

Probably much better than some of the products out there

[@zikavalera]

Привет из России. За проделанную работу лайк. Время и ресурсы потраченные на переделку не стоят того, проще купить новую.

[@vlota]

Но никто не стал бы смотреть видео, на котором он ходит по магазинам за новой угловой шлифовальной машиной

[@ВладВлад-ю2н]

Я тоже иногда херней маюсь😊

[@sallehsallehnewton3258]

Slava Rossiya

[@ZaftDima]

@@vlotaда он просто кайфовал от этого

[@الثعلب-المكار]

True !

[@ahernplays2239]

I genuinly love the fact when making that L bracket thing fit that they used annother angle grinder to do the work. It's fun because while you know the same result could be achieved another way it shows you that said tool type is useful, nicer, or just an easier way to do the same thing.

[@gear_show]

I'm glad you like my work, thank you!

[@dougaltolan3017]

Next you'll tell us you only have 1 hammer...

[@maxheadroom1506]

its amazing how nice you made this conversion and to know exactly how many turns on the wire to make, you definitely know your stuff. That said it probably would have been easier to buy an angle grinder of this type.

[@gear_show]

Thank you very much!

[@Mikeson33]

This is why I own 5 or 6 grinders , if you let the smoke out , it's done!!! DONT LET THE SMOKE OUT°°°!!!

[@dougaltolan3017]

​@@Mikeson33You can buy replacement smoke. It comes in copper wire cages, you can see the charred old empty one in the video.

[@stephanieking9242]

I had a lot of old pipes and rebar to cut up and from what I read kzbin.infoUgkxPDBfLu68o58Aw85O_J-zIFfjJARBhp-3 this would be the tool for the job. Since I had never used one, I watched a couple of youtube videos and I'm so glad I did. Some really good safety tips, which I followed, and this tool did a splendid job. One good thing to know is the weight of the tool puts just about the right amount of pressure on the metal I was cutting, so I didn't have to use a lot of pressure, which is more likely to jam the tool. It made fast work of my job.

[@Hongqie]

it's quite a while since i stopping by and this channel has transformed to remaking instead of just restoring things.

[@stuartodell1709]

When you press in bearings, you press on the outer race, not the inner race. this avoids damage to either race and/or the ball bearings in between. Other wise it was a nice job (ignoring the little boo boo of cut leads.)!

[@gear_show]

That is excellent tips, I do appreciate that.

[@maryboyle5515]

Yeah, I saw that but I didn't see him fix them

[@СотаУникальный]

Мне понравилось когда перегородку корпуса пилил ножовкой,заодно и провод перепилил от статора))))

[@nialldaly7108]

A bit unfortunite, yes, But I'm sure he repaired it, - He must have done as it works.👌😣

[@bubisav123]

Crazy amount of work, but the result is really amazing

[@Dipplers]

Wow wasn’t expecting you to combine 2 brushless motors! 👍👍👍

[@massaid88]

13:20 The outside must be pressed, not the inside. Pressing the inside during installation, it can cause a damaged bearing 🙏

[@suecordon8763]

Ignore all negative comments because you completed an amazing transformation from a clapped out, burned out piece of junk to a fresh cleanly built cordless, brushless, powerful angle grinder which almost all of the people who wrote negative comments wouldn’t be able to do themselves. It’s not always about time and cost affective value, it is a project with 100% results so ignore the haters and I am not slating the ones who have pointed out of some alternative ways which may or may not help you in future projects I don’t know, all I am saying is you have done a great job and I for one took a lot of positives from it, well done

[@Anton_Noname]

Yeah, the experience of how to do it is not necessary.

[@lukeolinger6000]

Fantastic work, but the lack of a safety release kind of surprised me in this build. Agreed about the flat button to prevent accidental on situations, but that also makes it difficult to turn off too.

[@armandoperez6673]

Could have used a press on/release off kind of button switch.😊

[@AlphaTroniks]

​@@armandoperez6673 or a conventional/ stock angle grinder switch

[@hicham1101]

As for the idea, it is wonderful and genius, but there is something that I did not like in this work, is the power button and its place is out of reach, you had to put it in one of the place of the coals that no longer exist after this update.

[@willowpine2604]

I will agree to that my friend! He could put that switch somewhere in his finger close by! But its nice modification!

[@aguilaestre2542]

Or even better, a trigger, like the new grinders

[@QuockhanhPham20]

i love this series from you the way you connect the brushless motor exactly what i have thought about it

[@ВладимирВинокуров-ь2в]

the set of stator core sheets should not be shorted, and you put it in a steel sleeve. This is the first. Secondly, bearings cannot be pressed into the inner race! Third, the wire needs to be wound carefully without twists or creases and as evenly as possible, this is not the case with you. Fourth, the general impression is that you have never held a soldering iron in your hands, not to mention rewinding motors... And everything turned out easy and simple for you))) I don’t believe you)

[@crossfingerss5859]

Reducer bearing was installed incorrectly, You should push on the outer shell not inner. Overall not bad.

[@zeynepdizdar4783]

I xzz ş

[@wilberumana6521]

nice job overall the only problem with this it's that after purchase all the necessary parts it's end up costing more than a very new cordless grinder all together plus all the work to putting everything together . But on the other hand it it's a very good to have something custum that no body else has and I really like that .

[@gear_show]

That is true, thank you!

[@matpold]

It is also a great demonstration of how motors are winded and work.

[@PinePondCTDevilsHopyard-fy3hj]

Two rebar and the battery is dead. Next video is converting cordless to corded! 😊

[@alo_xeno]

Too many negative comments without work? You should be ashamed. Keep up the good work, I'm waiting for your next amazing work.

[@nianiucha21]

Ogladałem do konca jestem pełen podziwu dla twojej wiedzy😮

[@snehamusicworld1913]

I love your brushless motor conservation series🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃

[@Filippulya]

did you fall asleep on the keyboard?

[@Freeway548]

建議電池座的方向換一下比較順手，目前電池方向和砂輪片同方向，使用起來某些角度會卡到電池，切割時的火花也可能噴到電池、可以參考makita 電動砂輪機的設計比較順手，個人小小建議

[@juancarlosdiaz2334]

gracias a tus videos. de restauracion aprendi mucho.de todas las formas q vi de tranformar un amoladora 220 a una electrica de 18 v me quedo con esta version de video.las demas vi no llegaban a la fuerza q muestras esta.y eso q tambien tenian torno y todo las herramientas para hacer dicho proyecto.gracias a tu canal las cosas q encuentro las puedo restaurar mejor sume mucha experiencia,uno de lo mejorsitos canales q vi de este nicho

[@scottyhankemeier9380]

First conversion of this type I've seen. Nice. Probably the best quality 18v angle grinder out there. The older tools are just better. No shitty overload/battery/stall protection like most. Hate that on my m12 fuel die grinder, it just stops, I wish it would just bog down, instead it unexpectedly stalls suddenly. Annoying. Nice work man!

[@BloodSprite-tan]

you should probably buy a better die grinder then?

[@alexpdiy]

You're making such a big deal out of this. Respect to you.

[@arturismagilov3285]

The idea is not bad, but there are few revolutions... so you will make one cut of reinforcement for half an hour...😅 It's easier and faster to buy at the factory store without worrying - and it will have higher revolutions per minute than your homemade one...

[@-Oleg1]

Good work. An idea for second video: buy a pwm controller and pwm driven motor driver as for rc quadrocopter, with soft start, soft and immediately stop. And good idea for safety is to add a body button to stop instrument if you loose your hand over it.

[@gear_show]

Okay, thank you for sharing! That is a great idea.

[@alexandrugajin763]

I am not sure if the speed controler will last too long, especially if you force it. since it has to take the load of basicly two motors now. And usually these Controlers are used with switches wich gradually give power. All those on/offs at full power will burn it quick. It would be nice if you could use an RC testing switch wich can gradually increase power and set what speed you want. Also I am kind of a welder sometimes and i've been used the angle grinder to cut alot of metal. I've found the thin discs, the 1 mm ones to be best for cutting metal, they cut faster, cleaner, heating the material less and giving you a more precise cut. At first i thought those are only good for cutting thin metal sheets, but is good for anything you wanna cut. The only thing you have to be careful with when using them is when you cut tubes and thick pices of metal not to pinch the disc as you are grinding through the cut, those thin discs explode very fast. But even if they do if you have good eye protection and a cover for the disc you are safe. I think alot of people are afraid of those discs as they are so thin but once you learn to work with them, trust me, you will rarely use these 1.5, 2mm ones to cut anything.

[@luisleandro7810]

Que trabajó más ingenioso, muy buena idea. Felicitaciones

[@patrickmorrissey2271]

Great job. You got a lathe?!?!?!? Oh my goodness.... The sky is the limit now!!!!!

[@yeagerxp]

Everybody has a lathe, 🤣🤣🤣 except you and me 😭😭and please don't say you have a lathe too 😵‍💫😵‍💫🤣🤣🤣🤣.Peace

[@mukwevhophathutshedzo1646]

😅😅😅, I don't have it too

[@patrickmorrissey2271]

@@yeagerxp I do NOT have a lathe....

[@ramonesteban5473]

Un trabajo titánico , me parece increíble lo que haces , enhorabuena por el canal. Muchas gracias por compartir , un saludo.

[@gear_show]

De nada, ¡muchas gracias!

[@RefurbishmentKJ]

great! I like it very much, I have learned it!😊

[@Kudratbekk]

Шедеврально, респект 🔥 золотые руки!

[@sichkaksich7934]

колхозная залупа по цене норм болгарки... однозначно шедевр=)

[@alexthesage]

Подшипник запрессован неправильно - усилие должно быть на внешнюю обойму к тому же помят пыльник на подшипнике, а ведь он находится в самом грязном месте - вывод: скоро потребуется его замена. В целом работа проделана отличная, странно, что с подшипником вышла такая досадная ошибка.

[@TheVLAD501]

По мимо подшипника есть и другие косяки... Например очень не удобная кнопка!

[@abdullah.a3237]

I have been following you for a relatively long time. I am one of your followers from Egypt. I like the type of your videos

[@MeilyFoodie]

Amazing work Mr gear show 🇰🇭🇰🇭🇰🇭❤️❤️❤️❤️sending love from Cambodia 🇰🇭

[@vinceianni4026]

Hello mister this converted is one of best work beautifully done

[@gautambiswas3248]

excellent indeed !! just one suggestion, do not mount the bearings putting pressure on to the inner race or ring when assemble that into a housing.

[@gear_show]

Thank you so much for sharing

[@timcortez754]

Parabéns o resultado final ficou espetacular, houve muita engenharia, e ficou sob medida

[@kahlid-ataya]

0:40 Magic smoke is always welcome 😂😂😂😂😂😂

[@netts2315]

Every machine is a smoke machine if operated wrong enough. - Someone smarter than me

[@TundeEszlari]

You are a very good KZbinr. ❤

[@ВикторБаженов-р4л]

Ребята, он показывает работу своего интеллекта.

[@dedengdedeng3151]

Di dukung dengan pekerjaan yang sangat baik dan rapi hasil nya pun memuaskan... Selamat buat anda....

[@RimsonSianturiOfficial]

wow! kreatif banget ya mantap dan sangat terinspirasi 👍👍👍

[@OvervoltedMinds]

I always jump right into the videos you publish. But this time was quite intrigued when you pressed the bearing in by pushing onto the inner ring. Why didn’t you use a socket or something so you avoid damaging it?

[@ezue75]

Yup... I noticed that too

[@thebeast7690]

people make mistake sometime 😉.

[@dtctksqdbnfkbr]

Why are you worried about the bearing, no one will use this tool anyway!)))

[@thebeast7690]

@@dtctksqdbnfkbr i still use it

[@HIJYOSHOKU]

​@@dtctksqdbnfkbr 草

[@vadiz]

Nice project

[@Chinhnguyen0497]

nice. I've been waiting for it all the time but only you do this

[@Green_Screen_kid756]

1:13 there was spider living in this after what I saw the spider survived 😂😂😂

[@eutiquiog.penonesjr7170]

Yes very good! Only you must change the Type of switch for SAFETY precaution

[@injun4387]

The cost more expensive than buying new one. Anyway it is a success experiment..

[@ramingo.craftsman]

Impressive project!

[@ricoacibar7060]

Wow you are the best DIYers👍👍👍☺️

[@DigitalBhangari]

Now that's some next level stuff

[@소빙빙-k2j]

이정도 기술이면 거의 모든 기계를 고치겠네요 침 잘하시네요

[@BITTYBOY121]

I love what you did here - Well done - Bravo !

[@gear_show]

I'm glad you love it, thank you!

[@BITTYBOY121]

@@gear_show You are welcome - Much respect to you. 👍

[@arunendrashekhar]

@@gear_show link of that motor plzzzz

[@dogukancil5128]

I think you shorted out the laminated stator core with that sleeve you pressed in. You should have insulated it. Now it will generate a lot of eddy currents and slow down the motor, reduce the efficiency and generate heat.

[@gear_show]

Thank you so for the feedback, I will care about it next time

[@user-dz1nm6ed4y]

Зачем проверять на корпус все три, если они проверены между собой и прозваниваются.Идея зачётная. По виду резания, мотор получился слабоват.Хотя лайк за умение мыслить и за приложенный труд.Удачи!

[@internet5213]

Конечно слабый. Он 4 полюсной на скорость а не на силу

[@TechnologyGuru0000]

Super job done

[@حسين-ج9ط7ي]

thank you teacher❤❤❤ Great job, thank you brother. You are so talented

[@МихаЛукин-с1ж]

Попробуй, в следующий раз вставить, модельный двигатель 3670 или 3660 2600KV, на выходе получится примерно 10000-12500 оборотов. Вот только не знаю, штатная плата осилит такой двигатель или нет, хотя там токовый шунт, не проблема поменять. Компаунд счищается легко, заточенонной наискось одноразовой палочкой для суши.

[@VovaRemnev]

Well done, as always surprised us with his work 😊

[@emesma]

This is quite a great job. My respects.

[@battsy2911]

Master at his craft

[@babylonlion4603]

The idea has been mooted before. But the work is excellent, with high craftsmanship and accuracy. But there is no economic feasibility to buy a new one, the price does not differ much

[@fatehamrani1322]

Very very good😍 nice

[@Cingishancik]

Мощность, после такой переделки, я думаю уже не та...

[@K_Pppp]

Обороты тоже уже не очень

[@KoniARIS-vc3cd]

That's powerful man😮

[@Kosay_1998]

23:01 From the visual pleasure this is called great work

[@bastelfix]

Thx for the video, inspiring!. Impressive work, but if you count time work time for planning, procurement, parts and tools usdage you'd better buy a new one.

[@saeidmousavi7380]

Perfect,, so much like and thank you for the helpful clipe I ❤❤❤❤❤❤❤

[@farhadfadayi7389]

you're just amazing. respect.

[@marktwain2813]

This is an enviable accomplishment! Bravo.

[@gear_show]

Thank you! I'm glad you like it.

[@djamellouhibi3039]

عمل متقن و رائع...واصل ابداعك يا فنان

[@shayanzarbati5216]

Excellent Bravo 👏 You are really master Perfect 👍

[@gear_show]

Thank you! 😃

[@abdulwahid8579]

Good job with all the best information and knowledge 👍

[@LuisTeixeira]

As you are using a brushless controller, maybe it would be easy to add a potentiometer and have proportional control of the RPM. Could be useful to throttle it is some situations, and not all angle grinders have that feature.

[@AufTrass]

16:56 Молодец чувак! Один провод отрезал, так и остальные отрезай!?

[@0108artem]

Там написано Oops что в переводе ОЙ

[@n0b0dy07]

You should build a 3D printer to build custom parts like the battery support, none of less that project is awesome

[@raulhumbertosadler3961]

UN PROFECIONAL FELICITACIONES PORQUE TODO EL PROCESO DE PRINCIPIO A FIN EXELENTE

[@alexpadovano8172]

Incredible work, I continue to be amazed by your work with motors.

[@marianpintilie7799]

Congratulations Gear Show on this successfully completed restoration...❤️❤️❤️❤️🤟🤟🤟😘😘😘

[@rishabhgupta3562]

Always Enjoy Watching Your Work

[@georgeh9967]

fantastic work. and a big but. the parts cost as much or more than just buying one new. and most of us dont have lathes ,presses. other tools. and your electrical knowledge

[@robann1971]

Помните мультфильм где говорят " А , сойдёт и так " ? Вот прям один в один

[@mikemakuh5319]

Wow! such drama and suspense! I can hardly wait to see the conclusion.

[@diyfireking]

Excellent video 💕💕

[@Skills1.0]

Amazing process

[@Лунный-п1д]

Просто красавчик. Умница 👍

[@bienrionoihsan]

Wooww great modivication

[@joselynagoncillo8744]

Simply the BEST!!!!

[@jhonylood1492]

you are ingenious

[@user-uq7sr9eb7v]

Awesome, I’m gonna have to try this

[@KrispyBizcut]

Wtf.. and my dumbass went out a bought a cordless one!!! 😂😂😂 Great job!! I really wish I could do stuff like this!