Motor longevity?

[Neptune]

Hi All,

Do any of you know approximately how many hours a stock johnson/mabuchi will last before needing replacing? I was always under the impression electric motors last forever, but of course that is not true. My trinity monster stock already needs a com skim after a couple of hours bashing.[8)] Here in South Africa i have yet to see a brushless motor setup for cars for sale, but do these motors actually last forever?

[raemin]

My Clod buster is still running after 12 years of regular operations, with its original motors. Depending on the usage normally these engine last for ever : as long as they are not overgeared the brushers and coms last for long:

The number of rpms is low

The current intensity is 4 times less important as with a 17turn

The brushes springs are very soft.

When they are starting to lack power, you can just revive them by runing them within water with a 4.5v battery. CRP used to make a specific liquid that allowed to clean them efficiently, but water is fine as long as you lub the bearing after such operation.

Raoul

[mymonsterbeetleisbroken]

yea my clod is donkies years old now and still has its original motors,

as far as i can tell it still works fine []

[fatboyslim]

Well 'as far as you can tell' your Monster Beetle still works fine!![]

(The 'old' one that is! NOT the spangly shiny shelf queen[8D])

[bholio]

You can probably measure the lifespan of those silvercans in years, not hours. They last very long. Higher power motors need more maintenance and rebuilding more frequently as they wear out.

Supposedly, brushless will last until the magnets in the can die, or the electronics melt. The only moving parts which can wear are the bearings at the ends of the can. No brushes or comm friction/wear.

[jozza]

I would agree with that; my Johnson in the Monster Beetle is getting on for 18 years old+ and it still works fine. Then again, how many of those years were spent not running I'm not sure!

Motors used for racing tend to last about 6 months, but i retire them to the Tamiyas when I've finished with them; they may not have enough punch left for racing touring cars, but they still make a fine replacement for the stock cans, and still have probably a years worth of thrashing left in them. I put some ultra long lasting brushes into them when I put them into a Tamiya. How long it lasts depends on how often/how deep you skim the commutator. You can also buy replacement comms, which are a third the cost of a new motor, and get the can magnets rezapped, cost depends on your model shop for that service.

[GPZ1000RX]

The only other thing that seems to claim the life of a kit motor is the dreaded big impact! seems the commutator isn't to secure on the shaft and gets knocked nearer the stack causing lots of end float in the can.

Doesn't stop them going OK but can cause gear mesh problems.

[mymonsterbeetleisbroken]

quote:

Originally posted by fatboyslim

Well 'as far as you can tell' your Monster Beetle still works fine!![

]

(The 'old' one that is! NOT the spangly shiny shelf queen[8D])

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LOL! []