Non rebuildable motors.

[blakeyx]

Can anyone recommend a decent non-rebuildable motor? The reason I ask this is because between my wife and I we run 4 cars and the outlay for a lathe etc. is too much for the time being. I am basically looking for a motor that I can change the brushes on a couple of times before having to throw it out. At the moment I run a hellfire in my touring car but it does get anoying having to ask people to skim it for me and I don't want to take advantage.

[mr_pushrod]

It doesn't matter if the motor is rebuildable or non-rebuildable, it'll wear the same. You may as well get a rebuildable for the same or tiny amount more money and either not bother skimming it, skim less often or just clean it with scotchbrite or similar. Non rebuildable motors are at the cheaper end of the market anyway so won't have as greater life or performance as a decent rebuildable anyway.

[sosidge]

I think if you're running 4 cars it won't take very long for you to have bought a lathe's worth of cheap motors!

[blakeyx]

quote:Originally posted by sosidge

I think if you're running 4 cars it won't take very long for you to have bought a lathe's worth of cheap motors!

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[blakeyx]

I had worked that one out for myself. But like I said I don't have the money to buy a lathe and decent rebuildable motors at the moment. What I asked was can anyone suggest motors to use whilst I save for a lathe.

[The Dodge]

I apologise in advance for this suggestion!

Can you not take a rebuildable motor, but instead of using a lathe on the comm take a piece of plastic and drill a hole the same diametre as the shaft of the armature mount this vertical in a hobby vice. Then fix the armature in a portable hand drill with the comm end outwards. Glue a small piece of very fine emery, grit paper to a flat piece of wood, plastic as your comm dressing tool. Engage the armature in your vice block and whilst someone (ie wife []) holds the drill you can dress the comm up. Having the emery on stuck on a flat surface will give a nice flat finish.

This will require steady hands but then if your an rc racer thats pretty much a given[8D]

I know you were after a motor suggestion but i can't help thinking there are always other ways to acheive the same goal.[] And all the better if it costs less!

[Shodog]

quote:Originally posted by The Dodge

I apologise in advance for this suggestion!

Can you not take a rebuildable motor, but instead of using a lathe on the comm take a piece of plastic and drill a hole the same diametre as the shaft of the armature mount this vertical in a hobby vice. Then fix the armature in a portable hand drill with the comm end outwards. Glue a small piece of very fine emery, grit paper to a flat piece of wood, plastic as your comm dressing tool. Engage the armature in your vice block and whilst someone (ie wife []) holds the drill you can dress the comm up. Having the emery on stuck on a flat surface will give a nice flat finish.

This will require steady hands but then if your an rc racer thats pretty much a given[8D]

I know you were after a motor suggestion but i can't help thinking there are always other ways to acheive the same goal.[] And all the better if it costs less!

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This would be a sure way to make it worse. I agree with what Sosidge says, a lathe might look expensive but over the long haul it will pay for themselves. It was one of the best investments I have made. I can't begin to remember how many $50 mod motors I went through where the comms were unusable. Plus you can charge charge your friends for skimming their comms.

[mud4fun]

You can actually buy comm cleaning sticks from your LHS, I have a couple. They are not to get away from skimming but do a nice job of cleaning up a mildy blackened/dirty comm. They also come with a rounded section on one end which can be used to clean the end of the brush as well.

I have used them with good results in many vehicles such as my monster scorcher where it is a big pain to remove the motor. (It was modified to run a mag meyhem) These cleaning sticks simply slide down the brush slots so obvioulsy you need a motor with replaceable brushes. Anything without removeable brushes should be considered disposable.

However, I've found that stock 540 silver cans can last hundreds of hours use without problem because they draw so few amps compared to high performance motors. I also have a cordless drill motor in my crawler, it is a RS550 silver can. It has done over 50 hours running and the brushes are barely worn, comm is still lovely and clean and it has been running on 8.4v and even 9.6v at times! These are obviously low speed/low current draw motors. I guess if you want speed then you have to sacrifice something and in most cases that equates to money!!!!

[The Dodge]

funny, as i am involved with a business that refurbishes industrial electrical motors and we use a similar method, all be it on a slightly larger scale. Didn't want to add that to the post as it seemed trivial. Moral is, don't knock it till you've tryed it []