Carbon Brushes Replacement Standard

[G_Ahmed]

I wanted to know regarding the replacement of carbon brushes. What does the standard says, when should we replace our carbon brushes on what length?

 

[dArsonval]

There is no "Standard" related to carbon brush replacement.

John

 

[Gr8blu]

The brush should have a "wear line" - either a milled groove, or a painted line - about 1/4 of the "new" length from the top where the leads connect. How long it takes you to wear the brush down to that point depends on a lot of little things: how much current for how long, how much moisture in the air, what temperature at the brush running surface, whether the surface is a commutator or a collector or a shaft, what the brush material is, how "true" the running surface is, what speed you're running, how much contamination is in the immediate vicinity, etc.

First suggestion - read the operation and maintenance manual that came with the machine. Second suggestion - go talk to your local brush rep (for the brushes you're using). Third suggestion - go talk to the brush rep (that you want to switch to).

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