Brushed motor wiring questions

[lincpimp]

Originally Posted by TexasSP

If I spend 140+ on an rc motor it sure as hell won't be brushed.

You got that right!!!

I may have to get a dewalt 820 and run it on 5s lipo with a MMM. See how good it really is...

Anyone know how effecient they are?

[Oppressor]

Originally Posted by lincpimp

You got that right!!!

I may have to get a dewalt 820 and run it on 5s lipo with a MMM. See how good it really is...

Anyone know how effecient they are?

As per that robotwars wiki, about 81% for the old style can

http://www.robowars.org/wikka/DewaltDrivetrain

[lincpimp]

Originally Posted by Oppressor

As per that robotwars wiki, about 81% for the old style can

http://www.robowars.org/wikka/DewaltDrivetrain

Thanks, I may have to give it a try then, that rating is not much worse than a feigao!!!

[Oppressor]

Originally Posted by lincpimp

Thanks, I may have to give it a try then, that rating is not much worse than a feigao!!!

Keep in mind though that efficiency will fall faster if they are run at lower voltage.

[BrianG]

You mean aside from the arcing and friction from the brushes?

[lincpimp]

Originally Posted by BrianG

You mean aside from the arcing and friction from the brushes?

I think it has a built in fan... BrianG cryptonite there

You may be right, but it would be interesting to play with the "best" brushed has to offer, at least for 40 bucks...

BTW, I have the 6x6 maxx rolling now. Check the build thred!

[BrianG]

Originally Posted by lincpimp

I think it has a built in fan... BrianG cryptonite there

TBH, I'd use a fan if it was built into the motor, kind of like a Pletty. It's the add-on crap I'm dead-set against. Not only does it look retarded and messy, it shouldn't be needed. But if the fan was built-in, I'd see it as a little extra insurance against heat. And I hate heat more than I hate fans.

[lincpimp]

Originally Posted by BrianG

TBH, I'd use a fan if it was built into the motor, kind of like a Pletty. It's the add-on crap I'm dead-set against. Not only does it look retarded and messy, it shouldn't be needed. But if the fan was built-in, I'd see it as a little extra insurance against heat. And I hate heat more than I hate fans.

Yeah, the plett fan is a really nice design. Makes the 1512 motor as capable as a 1515... I would rather not have the fan myself, but it does help alot on brushed motors.

[lydiasdad]

Originally Posted by BrianG

You mean aside from the arcing and friction from the brushes?

some sparks do fly, but these motors handle 24 volts well.
@lincpimp get one. If you want brushed, get the dewalt.

[lincpimp]

Originally Posted by lydiasdad

some sparks do fly, but these motors handle 24 volts well.
@lincpimp get one. If you want brushed, get the dewalt.

I may still give the dewalt a try, but I think an outrunner will end up in the truck I am building. I have a 2826/12 axi that fits my gearing perfectly...

[lincpimp]

Ok, so I got a dewalt motor out of an 18v drill. How do I go about removing the pinion? Looks like it is pressed on, but the gear appears to be on as far as the front bearing. I guess I can grind the gear off on each side to release it...

[suicideneil]

Yeah, just grind off some teeth until the gear falls apart more or less, or grab a pinion-puller to remove it the 'proper' way... :P

[BrianG]

You could try heating up the pinion. The metals are probably not the same, so will have different expansion rates and may be easier to remove...

[lincpimp]

Originally Posted by BrianG

You could try heating up the pinion. The metals are probably not the same, so will have different expansion rates and may be easier to remove...

I can try to heat it, but have no idea how to hold onto the gear. I could clamp it into the vice??? Then use a punch to tap the shaft out of the gear...

[Oppressor]

If it was me, i would stay away from any treatment involving heat. It might undo the heat treatment that the shaft probably received hence weakening it.