How do you make hub motors?

[lox897]

Is it hard to make hub motors? They offer less resistance which is a bonus.
What are the CONS of hub motors?

This is what I think you have to do:
Take out magnets from another motor.
Make an aluminium cylinder and put the motor parts in that.
Put onto truck then slide wheels over.

Am I wrong or what is the proper way to do this?

 

[CSN]

check out this KS board that is using a planetary gear in hubmotor for more torque.

https://www.kickstarter.com/projects/staryboards/stary-worlds-best-electric-skateboard-get-yours-fo

Have to wonder how shock absorbing the thin layer of urethane will be on the drive wheel.

 

[maxchilton]

Is it hard to make hub motors? They offer less resistance which is a bonus.
What are the CONS of hub motors?

This is what I think you have to do:
Take out magnets from another motor.
Make an aluminium cylinder and put the motor parts in that.
Put onto truck then slide wheels over.

Am I wrong or what is the proper way to do this?

Lol, that's not how you make hub motors.

 

[torqueboards]

Buy pediglide's hub motors.

 

[Freshair]

You have a machine shop handy, or some cad design skills to send 3d renderings to a machine shop to make parts for you? If not than torques advice is probably the best way to go if you are keen on hub motors.

By the way have been pushing my hubmotor build for a few days now with out any power, the little to no resistance of hub motors is a huge pro! Can hardly even notice they are there.

 

[bandaro]

Is it hard to make hub motors? They offer less resistance which is a bonus.

Yep, they have much less resistance than geared drives. The slower the motor spins when kicking, the less resistance it can offer.

As for the building, it's not too hard assuming you have the tools, knowledge and experience. However, if you don't have a sufficient amount of even one aspect, then you will struggle. They require precise tooling and manufacture. If done incorrectly, you will at best destroy the motors very quickly. Do you want a motor binding at 35mph?


Edit - Sorry, my point is, they can be very dangerous. We are reluctant to say for the same reason you won't find instructions to build a pneumatic press on skate forums: mistakes = death.

 

[lox897]

Is it hard to make hub motors? They offer less resistance which is a bonus.
What are the CONS of hub motors?

This is what I think you have to do:
Take out magnets from another motor.
Make an aluminium cylinder and put the motor parts in that.
Put onto truck then slide wheels over.

Am I wrong or what is the proper way to do this?

Lol, that's not how you make hub motors.

Instead of being negative, maybe give constructive feedback?

 

[sk8norcal]

check out these links,

team testbot
http://www.instructables.com/id/Make-Your-Own-Miniature-Electric-Hub-Motor/?ALLSTEPS

first (small) hubmotor on a skateboard I have seen, 2010?
hardbord and ELB
http://www.wackyboards.blogspot.com/2011/03/hardbord.html

justin
https://endless-sphere.com/forums/viewtopic.php?f=35&t=49557

jacobbloy
https://endless-sphere.com/forums/viewtopic.php?f=31&t=65636

stielz
https://endless-sphere.com/forums/viewtopic.php?f=35&t=68181

pediglide
https://endless-sphere.com/forums/viewtopic.php?f=35&t=68614

Hummina Shadeeba
https://endless-sphere.com/forums/viewtopic.php?f=35&t=63029

freshair
https://endless-sphere.com/forums/viewtopic.php?f=35&t=71706

Nordel
https://endless-sphere.com/forums/viewtopic.php?f=35&t=71534

jeffbotticello
http://www.coroflot.com/JeffBotticello/Electric-Longboard-Hub-Motors-Personal

 

[LEVer]

You know I've been looking at Randal luge truck, the one with a floating axle (or two floating axles, HC help me out ). Here's a picture:

What if you use the motor's shaft instead of those axles and stick them inside the truck? You don't even have to open or modify the motor, just epoxy a wheel over it.

The only thing you have to figure out is how to secure the motor. I think you can weld a mount over those bearing chambers like Freshair did and screw on the motor.

No lathe or mill needed. Of course the question is, how strong are those 8mm motor shafts?

 

[sk8norcal]

its just one solid "8mm" axle.
the pic has the axle support bearings removed (need two 608 bearings to support the axle.) (looks like a 170mm compII hanger (for standup) but on a 60deg luge plate ??)

http://randal.com/170-mm/


I don't think this is what you need.

 

[Hummina Shadeeba]

that's a weird truck. "floating axle for less friction" It seems your wheels with bearings in them are sitting on a floating axle. I guess it's a legit claim but I bet the benefits are neglible. At only 170mm seems narrow for luge. If I did luge I'd want it 250mm and with 4 or 6 motors.

that thing could work as an inrunner and with a bearing on one wheel and the other wheel fixed to the axle.

 

[sk8norcal]

a lot of people don't buy Randal's claim of less friction. They are not that popular anymore, at least for standup.
some other supposed advantages are that when the wheel bearing fails, the axle will spin, thus safer; and the axle if bent can be swapped out.

the 170 hangers are for standup,
They do have a wider luge hanger that uses 4 bearings to support the axle.
(discontinued)
https://stokedskateboards.com/ran-t-hg205.html

 

[Hummina Shadeeba]

my in du hub turn dud hub motor didn't last long enough to make sk8norcal's list but I have to throw it up again.
https://endless-sphere.com/forums/viewtopic.php?f=35&t=63029&p=958376#p958376
It was kind of different in it's implementation. not that I recommend doing it this way, I don't. One perk was the drive wheel was standard and replaced in the same way as typical.
If the skate axle was straight, and the hole in the stator was smaller and bigger bearings fit, and you didn't mind your exposed motor 2 inches from the road.. then maybe.

do you know how the floating axle is fixed inside the aluminum hanger around it? Or is it just the wheels and their bearings butted against the big bearings in the hanger?

 

[sk8norcal]

cool, i remember that thread now.

the hardbord truck hanger is interesting.
http://4.bp.blogspot.com/-wBglqx-7z8U/TZK9vDO7SZI/AAAAAAAADu0/PnAtSkj2Zoc/s1600/hardbord%2Btruck%2B2.jpg

do you know how the floating axle is fixed inside the aluminum hanger around it? Or is it just the wheels and their bearings butted against the big bearings in the hanger?

maybe this pic explains it better.
the axle is free spinning, supported by two 608 bearings.

 

[Hummina Shadeeba]

the link is a classic hub motor build I've seen but never that picture. It looks like he just mounted the motors as is, but with the thane around them. Even simpler than periglide is making. But making that truck hanger looks like a lot of work. I never read much about how they went. How are those going?

I get the Randal trucks have a spinning axle but wondering what keeps it from sliding out horizontally. I imagine it's a smooth axle the whole length with no bearing seats on the axle. And the screw groove on the end of the axle is a mystery.
If the hanger were fatter and steel, maybe, maybe you could get a low enough kv and enough torque with the whole hanger length and then it would be BETTER than hub motors I think.

Someone with a lathe... would only need a welding torch, and a mild steel tube, and a bunch of glue, and motor wire, and magnets to get the whole thing done. surprised no one has posted an inrunner yet.

 

[sk8norcal]

ok, not sure if I am picturing what ur saying,
The motor would be in the wheel, but it would drive the opposing wheel?
or is the motor inside the hanger?

I get the Randal trucks have a spinning axle but wondering what keeps it from sliding out horizontally. I imagine it's a smooth axle the whole length with no bearing seats on the axle. And the screw groove on the end of the axle is a mystery.

the wheels/spacers/locknuts keep the axle from sliding out.
the screw groove allows you to tighten the opposing locknut. :wink:

the link is a classic hub motor build I've seen but never that picture. It looks like he just mounted the motors as is, but with the thane around them. Even simpler than periglide is making. But making that truck hanger looks like a lot of work. I never read much about how they went. How are those going?

I don't know either, they haven't update since 2010.
the pic is from his build log,
http://www.thevariableconstant.blogspot.com/search/label/HardBord
http://www.geekshavefeelings.com/posts/hardbord-hardcore-electric-longboard


ELB (4wd)
[youtube]e3C_zwYTrQ8[/youtube]

 

[Hummina Shadeeba]

I was meaning the motor in the hanger. A hanger similar to what you posted except with room inside to become an inrunner, so magnets glued to the axle and wires glued to the inside circumference of the hanger. And then one wheel fixed to that spinning axle and the other wheel on bearings and spinning free of ..the powered axle.

Ok i get the screw slot now. du