where to buy DC motor brushings for Black & Decker CMM1000 lawn mower?

[A. H. G.]

I have a Black & Decker CMM1000 5HP 24V cordless lawn mower for years. I am seeking the DC electric motor brushings to replace the pair on the motor. This brushing is spring-loaded, and can be remove by unscrewing the plastic holder. The brush width is half inch. Can you tell me is the brushing material copper? See photo here:

I look everywhere at all the typical hardware stores in Silicon Valley, and they do not have this.

Where should I look for it?

[treverly]

Hi, one of these 2 sites

or They both carry a large range of parts, including the brushes.

Good luck treverly

[A. H. G.]

Thank you very much, treverly

[David Nebenzahl]

On 4/27/2008 6:54 PM A. H. G. spake thus:

Since you asked, no; brushes are made of carbon.

[Andy]

But looking at the brushing material, it seems metallic and like copper. How is carbon material conductive?

[pheeh.zero]

Carbon brush are conductive but have some resistance. Carbon is soft and wears instead of the copper commutator. They have a copper coating to conduct better in their brass (usually) holders.