Standard Grade Industry Carbon Brush For DC Motor

Material

Model

resistance

Bulk density

Rated current density

Rockwell hardness

loading

carbon black

D308

40±40%

1.62±10%

10

86(-45%~+25%)

100KG

D374L

50±50%

1.71±10%

12

82(-50%~+67%)

100KG

D374B

57±57%

1.57±10%

12

83(-35%~+20%)

100KG

Advantage: high strength, low bulk density,   good rectification performance

Application of D308: suitable for micro DC   motor, like voltage regulator

Application of D374L: suitable for small   high speed series excited motor

Application of D374B: suitable for traction   motor, generator motor, exciting dynamo motor or DC motor which commutator   cannot be used