Boyo magic carbon
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BOYO CARBON located in Wuxi National High & New Technology Industrial Development Zone.
 
 

Natural graphite carbon brush

Natural graphite carbon brush is one of very important products of BOYO CARBON. The grade of this type are named by the letter S. These kinds of carbon brush material are based on natural graphite which go through a prolonged heat treatment during manufacture. The properties thus obtained make them capable of operating satisfactorily at the highest surface speeds at present in use. Some residue of the natural impurity remains in the brush material after processing and this provides the friction factor essential for satisfactory current collection at high collector speeds. This inclusion may sometimes result in more commutator wear than with brushes of the electro-graphite grades, but on the other hand, natural graphite carbon brushes have long life and operational stability when used for applications to which they are specifically suited.

GRADE

DENSITY

g/cm3

HARDENESS

SHORE

 

RESISTIVITY ̦m

COEF.OF FRICTION

CONTACT DROP V

NORMAL MAX SURFACE SPEED M/S

CURRENT DENSITY

A/CM2

APPLICATION

s3 1.70 10-35 8-20 0.25 1.5-2.3 25 11 80-120V DC MOTOR
s4 1.63 15-20 80-120 0.15 4.0-5.0 40 12 AC SHIFT ELECTORMOTOR AND HIGH SPEED MICRO ELECTROMOTOR
s5 1.65 20-28 90-150 0.18 3.5-4.5 35 10
s6 1.28 3-4.3 15-23 0.28 1.4-3.0 70 12
s9 1.58 12-22 200-300 0.18 4-5.5 35 8

 

 

 

 
 
 
 
 
 
 
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