Brushless Motor Shaft Replacement

  Рет қаралды 66,105

Robert Cowan

Robert Cowan

6 жыл бұрын

Ever wanted to know how to replace or upgrade the shaft on a brushless motor? It's easier than you think!
ServoCity actually has a great selection of shafts: www.servocity.com/shafting-tu...
Follow me on Facebook: / robertcowandiy
Support me on Patreon: / robertcowan

Пікірлер: 73
@GuilhermeSilva-qo3bo
@GuilhermeSilva-qo3bo 6 жыл бұрын
Hey, Robert, I'm from Brazil and I really enjoy your channel! Very nice work! Your explanations are very helpful!
@JonathanRansom
@JonathanRansom 6 жыл бұрын
I love opening my phone and seeing your KZfaq notifications!
@geologist_luna
@geologist_luna 4 жыл бұрын
Bob Ross of the Motor community? Nice video Bub, very useful, thank you.
@roddraym
@roddraym 4 жыл бұрын
Very insightful! Thanks Robert!
@samuelschuur7044
@samuelschuur7044 6 жыл бұрын
Hooray more videos on Crippling Depression.
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
There are a lot still coming, stay tuned!
@Ender_Wiggin
@Ender_Wiggin 6 жыл бұрын
love the video. I had a very similar problem but the shaft in my motor had a taper. It was the shaft for a Turnigy Aerodrive SK3- 6374 149 kv. How would you replace the shaft in this motor? More specifically, how would you match the taper so that the friction fit is still good.
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
Yep, you would need a lathe...
@lemarkmccray7774
@lemarkmccray7774 4 жыл бұрын
Hey what are the names of the tools that you used to grind the shaft down and my shaft has a flat side for the gear screw will this cut it flat on one side and where can I find these tools thanks
@ascherlafayette8572
@ascherlafayette8572 3 жыл бұрын
I'm running an xnova 4025 560 on a heli, is there any risk of damaging my motor doing this? Am I better off just grinding down the current shaft? Thanks
@1bengrubb
@1bengrubb 3 жыл бұрын
Robert! what is that Dremel bit you grind with?
@MisterXS75
@MisterXS75 3 жыл бұрын
hello Robert i have a slitghtly different bldc motor mine has no holes on the snap ring so i cannot grabt it with a plier like you did, any clue on how to remove the snap ring ? obviously there is not screw on the shaft either looks like it is sealed but there certainly is a way to open it as there are refurbished motors like mine sold everywhere i just would like to save a few bucks fixing mine by myself. Thank you in advance for any help
@DavidMolony
@DavidMolony 5 жыл бұрын
After snapping 3 allen keys (good quality Bondhus ones like in the vid...) trying to remove the screw from one of these propdrives, I looked at this video... it didn't help, but I later discovered the solution - use a soldering iron tip in the middle of the grub screw. I left it stuck in there for about 10 minutes, and then it came free easily. They seem to glue it in with some kind of black magic threadlocker...
@RobertCowanDIY
@RobertCowanDIY 5 жыл бұрын
Yes, they can be REALLY tight in there. I've always had good luck with a high quality allen key. if you don't have a 'nice' set of allen keys, this might be the time to at least try some out. They really can make a huge difference. I've opened up a couple dozen motors and never had an issue when using my good set of allen keys. But I really should have mentioned that heat always helps. Penetrating oil can help too.
@mq1506
@mq1506 6 жыл бұрын
Just a comment for those without a lathe, I know a bunch of people who've left the circlip groove out of the replacement shaft as unless your loading it in that direction (very uncommon with a combat bot) it's nearly impossible to separate the outer can from the stator assembly due to the magnetic forces created during operation. The circlip groove is also a major stress concentration. I've even seen motors come from the factory without anything retaining them axially.
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
I most likely could have gotten by just using a spacer between the pulley and where the motor mounts. The motor wouldn't be able to go anywhere because of the pulley. BUT, I figured I would at least show it, in case anyone else wants to add the groove.
@blackopal3138
@blackopal3138 Жыл бұрын
Hello. Can anyone here help me? I took apart a brushless tool, just to spin the housing and reorient the power button, and I can't put it back together, lol. There is a rubber ring in the bottom of the housing that the coil slides into, and the bearing sits in that ring, but I can't get the shaft past the magnetic housing, into the center, the magnet housing is too strong???/ Any ideas? ...please :/ lol peace
@devalopr
@devalopr 6 жыл бұрын
October is about to end ... hope you will resume your work on the stratasys 3D printer , i'm excited
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
Yep, I'm cleaning up the workshop and getting back to the stratasys! I won't have any videos on it for awhile, but I am currently doing some research and purchasing parts and will resume working on it. it will be the next project I tackle.
@devalopr
@devalopr 6 жыл бұрын
awesome!
@roberttan5602
@roberttan5602 5 жыл бұрын
If you want to only make the shaft shorter, can you just cut the shaft directly?
@eformance
@eformance 6 жыл бұрын
Be cautious with a torch, if you get the magnets too hot they will lose their magnetism.
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
truth. that's why I try and avoid using them on motors.
@eformance
@eformance 3 жыл бұрын
Necro spammers, die!
@gerryroberts662
@gerryroberts662 Жыл бұрын
Haveing diffuiculty replaceing a Motor on my vintage disk cutter, But was thinking of replaceing with a random fan motor.. of the same size, It uses a shaft like that,, I can the shaft machined. for a slower speed,,
@yash.s3321
@yash.s3321 2 жыл бұрын
hi, I have a Konica Minolta Bizhub Outer rotor type Brushless Motor whose shaft is badly damaged I want to know how are we supposed to take its Shaft Out?
@adaml52
@adaml52 5 жыл бұрын
Hi, A soldering iron is probably the best way of heating the grub screws to loosen the loctite. Also you can heat the housing the same way, to break the loctite, making it easier to press the shaft out. A piece of 8mm silver steel / drill rod would make good shaft for the motor. Marking the grub screw locations, using that method, will gall the motor housing bore, when removing the shaft. That clip is an external circlip not a snap ring, a snap ring is circular in cross section. Hope the was helpful to you. Adam
@rossrcfallacaro3422
@rossrcfallacaro3422 5 жыл бұрын
Adam L I have rounded the grub screw on my motor. What do you recommend I do to get it out so I can replace the prop shaft?
@Outland9000
@Outland9000 5 жыл бұрын
Instead of grinding the flats on the shaft could you counter bore some holes and use slightly longer set screws?
@glennedward2201
@glennedward2201 Жыл бұрын
Better to have a flat theyre stronger. Ive seem a flat combined woth a 2.5mm through hole where the set screw was also a through pin. The combination makes it impossible to slip.😅
@douro20
@douro20 6 жыл бұрын
BTW those snap-ring pliers aren't actually made by Channellock. They are made by Wilde Tool in Hiawatha, Kansas, the same people who make Craftsman sledge hammers and pry bars.
@sifterbox
@sifterbox Жыл бұрын
If they aren't made in Meadville they are not Channellock.
@wfrth
@wfrth Жыл бұрын
Could you help me replaces a 8s 1250 kv spectrum engine shaft or just tell me the parts I need
@waynefilkins8394
@waynefilkins8394 3 жыл бұрын
I really need help with something. Is there any way to make it so that the shaft doesn't move with the housing (whatever the outside part is that moves). Or would I have to mount that end onto like a ball bearing or something?
@RobertCowanDIY
@RobertCowanDIY 3 жыл бұрын
That would be an inrunner motor.
@tfergusonjr
@tfergusonjr 6 жыл бұрын
This may be a simpleton question but one I'd like to know the answer to. I am building 2 aircraft for drone operations. One fixed wing and one multirotor. I have purchased 2 types of motors recommended for each. The one I purchased for the multirotor has NO shaft on the mount side while the one for the fixed wing has an 11mm shaft extending from the mount side. WHY THE DIFFERENCE IN SHAFT? (Multirotor = Quanum MT4114, Fixed wing = Sunnysky X2814)
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
well, there is most likely some sort of prop adapter. many quadcopter motors don't really rely on a shaft, but rather use some sort of adapter for the prop.
@steadfast9354
@steadfast9354 5 жыл бұрын
Any recommendations for those of us whose "loctited" low-quality hex set-screw was too tight/glued for our properly-sized high-quality allen driver, which led to the rounding off the screw heads long before a conclusion of having needed to pre-heat it before removing would have commonly been drawn?
@RobertCowanDIY
@RobertCowanDIY 5 жыл бұрын
Eh, that depends... Your best bet is to try and drill it out, but that can be tricky. If it's stuck in there, you could try using superglue on the end of a hex driver or something, but it probably won't want to come out. If it's large enough, screw extractors work well (just search for them on amazon or wherever), but if it's too small, you might need to drill them out.
@steadfast9354
@steadfast9354 5 жыл бұрын
Thank you! Well done videos, love when someone does a professional job
@jstins
@jstins 4 жыл бұрын
William Keller I hint for next time. Use a pointy ended soldering iron placed on/in the set screw to soften the thread lock that was used to keep it from vibrating out. Then go easy applying force with the Allen wrench.
@sharpnesstherapy502
@sharpnesstherapy502 4 жыл бұрын
Wera hex plus
@trumanhw
@trumanhw 6 ай бұрын
I don't get it -- what does it use for the PTO..? Eg. why doesn't the shaft have a hex to transmit the motor's torque..?
@RobertCowanDIY
@RobertCowanDIY 6 ай бұрын
What's PTO? I'm not familiar with that acronym. There's just a set screw on these, which I've later changed. The original design didn't allow for a hex shaft.
@gerryroberts662
@gerryroberts662 Жыл бұрын
What type of motor is that, i think that might just work. ??
@RobertCowanDIY
@RobertCowanDIY Жыл бұрын
At 20 seconds, I literally say exactly what it is.
@glennedward2201
@glennedward2201 Жыл бұрын
Are outrunners easier than inrunners to swap shafts?
@RobertCowanDIY
@RobertCowanDIY Жыл бұрын
Generally, yes.
@DaveMcAnulty
@DaveMcAnulty 6 жыл бұрын
I use my vice as a 'horizontal arbor press' all the time :)
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
same here! but I don't have a bigger one, mine is limited to around 4" or so. The arbor press was a good addition to the shop.
@douglasbutler4360
@douglasbutler4360 6 жыл бұрын
The circlip groove is now the weak point in the whole shaft. If at all possible you should instead make a spacer and use the pulley itself to retain the rotor.
@Outland9000
@Outland9000 5 жыл бұрын
Ture, but could those motors even produce enough torque to twist shear an 8mm axel?
@rattlerrobotics8932
@rattlerrobotics8932 6 жыл бұрын
What lathe do you have?
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
I have the Harbor Freight version of this: www.grizzly.com/products/9-x-19-Bench-Lathe/G4000 It's OK, I got it cheap on craigslist. I don't use a lathe much, so it works well for what I need, but if I start doing more parts on it, I might upgrade.
@theideasman6018
@theideasman6018 3 жыл бұрын
Is it possible to put 2 motors on the 1 shaft
@RobertCowanDIY
@RobertCowanDIY 3 жыл бұрын
possible, yes! worthwhile, no. they will most likely fight each other.
@theideasman6018
@theideasman6018 3 жыл бұрын
@@RobertCowanDIY why will they fight each other if they are spinning the same direction. I'm new to this sory
@RobertCowanDIY
@RobertCowanDIY 3 жыл бұрын
@@theideasman6018 Slight inconsistencies in their speed. They won't move at exactly the same rate, so they could fight each other. I have used dual motors before, but with belt drive. You can certainly try it and see what happens, but it's generally frowned upon. In short... brushless motors need a driver (ESC) to spin. That driver tells them how fast to move by pulsing to the phases (the motors have 3 phases). The speed at which the pulses are sent tells the motor how fast to spin. If the two ESCs are slightly out of sync, or if the windings aren't identical, you could get them moving at slightly different speeds. If one is moving slower than the other, it would be braking the other, creating excess heat.
@theideasman6018
@theideasman6018 3 жыл бұрын
@@RobertCowanDIY thanks man. I've set up/modafide two 2205/2300 motors to slide on to one shaft. Each motor is running a 20a opto esc off a pdb on 4s. What do you think will go wrong first. Just old parts off a drone. Bit of fun really
@huckstirred7112
@huckstirred7112 2 жыл бұрын
i am gonna do this to my angle grinders
@eformance
@eformance 6 жыл бұрын
You should make a 100lb bot called "Raging Insomnia" and make a spinner within a spinner design that is slightly out of phase, so the spinners look like they are rotating very slowly.
@eformance
@eformance 6 жыл бұрын
Let's say you have 2 spinners, one smaller than the other, mounted coaxially on a robot. One spinner has a large hollow shaft that the other shaft passes through. Both spinners would be belt driven. You spin one of them at say 60 revolutions per second and the other one at 59 revolutions per second. The slight speed difference will show up as a stroboscopic type effect, causing it to appear to spin slowly. Bonus points if the lighting is at 60hz and you modulate the speed of the spinners to produce a 1-2hz beat frequency (also causing it to look like it's spinning slowly)
@Outland9000
@Outland9000 5 жыл бұрын
@@eformance 😵
@av8tore71
@av8tore71 3 жыл бұрын
What size? 2mm?
@RobertCowanDIY
@RobertCowanDIY 3 жыл бұрын
I think these have 8mm shafts.
@AdityaMehendale
@AdityaMehendale 6 жыл бұрын
Clickspring's bought shares in DykemBlue ^^
@makingthings277
@makingthings277 6 жыл бұрын
...You got a mill but you opt to hand grind it on the floor? Band saw cut when you were going to put it on the lathe anyway? Suspect you are sir, suspect.
@RobertCowanDIY
@RobertCowanDIY 6 жыл бұрын
Right?! I probably should have used the mill, but this was just quicker and easier. Sometimes I just use the tools that are closest ;-)
@serkanozkan8793
@serkanozkan8793 4 жыл бұрын
I also have a mill but I don`t want my soft and nicely calibrated slides attacked by diamond or sand particals that create permanent defect! He may be doing because of that!
@rahulghosh4289
@rahulghosh4289 3 жыл бұрын
Heating magnet results them to loose their magnetic properties please don't heat them
@RobertCowanDIY
@RobertCowanDIY 3 жыл бұрын
I mention this in the video...
@AdityaMehendale
@AdityaMehendale 6 жыл бұрын
"heat to loosen them up"?? --> Be careful you don't demagnetize the rotor!
@Mike_Greene
@Mike_Greene Ай бұрын
Uh .. Don't they make couplers, extenders, etc for this very situation??? Waves lots of time and don't cost much. When you think of the time you use to exchange shafts you could've ordered a party to come the next day and won't have to worry about running the motor. I'm sure there are other ways. You're doing this just to get the most 'heft" out of it. Lol , smh, and sigh
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