Characteristics of Carbon brushes


ectrical Graphite grade

Composition Grade Bulk Density Hardness Electrical
resistivity		 Flexural
strength		 Coefficient of friction Contact voltage drop Max. peripheral speed Max. current density Features/Application
£ç/cm3 HSC ¦Ì¦¸¡¦m MPa V m/s A/cm2
Electro Graphite 401 1.68 18 9 10 M M 30 10 Good film formation. Applicable for slip rings that easily generate streaking.
502 1.77 51 11 37 £Í £Í 25 10 Good roughing resistance because of fine grain isotropic structure. Applicable for low speed, small capacity DC motors and slip rings.
503 1.68 46 13 29 M M 30 10 Same as 502, good roughing resistance because of fine grain isotropic structure. Applicable for small/med capacity motors of faster speed than 502.
176 1.62 28 14 16 M M 45 12 Good film formation.Good commutation performance. Applicable for DC motors up to medium capacity.
TM-01 1.49 28 15 16 M M 45 15 Better commutation performance than 176. Applicable for high load DC motors.
BZ-229 1.60 23 22 11 M M 40 12 Moderate film adjusting function. Applicable for medium and higher capacity mill motors.
BZ-256 1.61 28 19 14 M M 40 12 Better film formation than BZ-229. Applicable for medium and higher capacity mill motors.
213 1.61 32 23 16 M M 40 12 Better film adjusting effect than 176. Applicable for DC motors up to medium capacity.
321 1.74 62 34 31 M M 35 10 Good wear resistance. Applicable for traction motors.
TH-03 1.75 68 40 35 M M 35 10
351A 1.63 49 47 22 H M 40 10 Standard material for commutation brushes. Applicable for medium capacity DC motors.
641 1.64 59 75 12 H M 40 10 Applicable for difficult commutation high capacity DC motors and universal motors.
803 1.46 40 80 12 H M 40 10 Applicable for difficult commutation high capacity DC motors.
171 1.65 66 100 21 M M 30 8 Good roughing resistance.Effective for roughing loss prevention purpose.
RE-92 1.48 30 14 10 M M 50 12 Applicable for mill motors subject to peak load.
RE-54 1.60 45 19 25 M M 40 10 Applicable with low load medium capacity DC motors and nonferrous slip rings up to 40 m/sec speeds.
RE-75 1.58 35 30 22 M M 45 12 Good commutation performance. Applicable for DC motors up to medium capacity.
RE-60 (RE59W) 1.63 70 52 19 H M 50 12 Applicable for medium capacity DC motors.
259 1.59 52 43 18 H M 30 10 Good commutation performance. Applicable for medium capacity DC motors.
SA-45 1.52 45 64 11 H M 40 13 Applicable for difficult commutation high capacity DC motors.
Graphite 402 1.71 24 10 18 M M 25 10 Has film adjusting effect. Applicable for thick film slip rings.
801 1.65 30 35 19 M M 45 15 Good wear resistance. Applicable for pump motors for power steering.
TR-50 1.76 30 14 18 M M 40 12 Better commutation performance than 788. Applicablefor forklifts of 48V or more.
TR-19 1.51 33 200 19 M M 40 12 Good wear resistance. Applicable for 3-phase commutator motor.
BY-14 1.29 18 25 9 H M 62 8 Applicable for high speed slip rings such as turbine generators.
634 1.20 16 25 4 H M 62 8 Applicable for high speed slip rings such as turbine generators.
RX-91 1.37 31 300 17 M M 40 10 Good wear resistance. Applicable for 3-phase commutator motor.

¡öCoefficient of friction : H¡Ä0.25¡Á,¡¡M¡Ä0.20¡Á0.25¡¡¡Êmeasurement condition/ Slip ring : Copper,¡¡Speed : 9.3m/s,¡¡Current : 0A¡Ë
¡öContact voltage drop : M¡Ä0.5¡Á1.0V/pc¡¡¡Êmeasurement condition/Slip ring : Copper,¡¡Speed : 9.3m/s,¡¡Current : DC10A/cm2¡Ë
¡öThe colored grades use imported materials.


Composition Grade Bulk Density Hardness Electrical
resistivity		 Flexural strength Coefficient of friction Contact voltage drop Max. peripheral speed Max. current density Features/Application
£ç/cm3 HSC ¦Ì¦¸¡¦m MPa V m/s A/cm2
Copper Graphite I M-90 6.30 15 0.32 108 M VL 20 25 High strength copper alloy type. Applicable for contacts and grounds.
M-1T 6.19 13 0.27 108 M VL 22 22
M-2T 5.70 15 0.50 80 M VL 25 20
M-1H 6.83 6 0.04 87 M VL 25 20 High copper content.Very low temperature rise and contact voltage drop. Applicable for high electrical capacity generators and motors.
M-1 5.41 12 0.08 42 £Ì VL 30 25
M-1F 5.30 18 0.15 49 £Ì VL 30 25
M-2H 4.93 13 0.10 34 £Ì VL 30 20
M-2HF 4.80 18 0.33 44 M VL 30 20
M-2 4.40 15 0.50 29 L VL 30 20 The copper content amount is next to M1, M-2H class and good wear resistance. Applicable for large capacity generators and slip rings for general rotary machine.
M-2F 4.35 15 0.50 44 M VL 30 20
M-3H 4.04 16 0.70 29 M VL 30 18
M-3HF 4.05 20 0.60 44 M VL 30 18
M-3 3.78 17 1.00 29 L VL 30 18
M-4 3.48 17 2.00 25 L L 30 18 Middle grade between graphite and metal graphite and has features of both. In particular, it is superior in roughing resistance. It is applicable for small/med capacity generators and motors.
M-550 2.96 25 2.50 39 M L 35 15 Good wear resistance. It is particularly applicable for stainless steel slip rings.
M-750 2.32 23 6.00 32 M L 35 15
788 2.02 23 9.00 23 M M 45 12 Good dementional stability in high temperature. Applicable for forklifts of 48V or less.
M-2TB 5.74 12 0.48 65 M VL 25 20 Same application as the above M-1 and M-2. But does not contain lead.
M¡¾1B 5.30 10 0.10 43 £Ì VL 30 25
M-2B 4.34 13 0.28 31 L VL 30 20
Copper Graphite ­¶ MF-302 2.65 18 3.00 23 M L 30 20 Applicable for automobile DC 12V fan.
MF-501 3.00 20 0.90 28 L L 30 20 Applicable for automobile DC 12V winch.
MF-101 2.90 18 2.20 28 M L 30 20 Applicable for DC19.2V cleaners.
MF-202 2.05 10 38.0 23 H M 30 15
MF-203 2.05 10 30.0 23 L M 30 15
MF-301 2.40 15 10.0 23 M M 30 20 Applicable for DC 24V cleaners.
MF-401 2.67 18 10.0 21 M M 30 20 Applicable for DC 19.2V cleaners.
MF-204 3.78 15 0.3.0 40 M L 30 25 Applicable for DC7.2V power tools.
MF-205 3.00 20 0.80 28 M L 30 20 Applicable for DC 24V power tools.
MF-201 2.25 10 30.0 23 M M 30 15 Applicable for household coffee mills.
MF-601 2.05 10 50.0 23 M M 30 15 Applicable for electric wheelchair.

¡öCoefficient of friction : H¡Ä0.25¡Á¡¡¡¡M¡Ä0.20¡Á0.25¡¡¡¡L¡Ä¡Á0.20¡¡¡Êmeasurement condition/ Slip ring : Copper,¡¡Speed : 9.0m/s,¡¡current : 0A¡Ë
¡öContact voltage drop : M¡Ä0.5¡Á1.0V/pc¡¡¡¡L¡Ä0.25¡Á0.5V/pc¡¡¡¡VL¡Ä0.25V/pc and below
¡Êmeasurement condition/Slip ring : Copper, Speed : 9.0m/s,¡¡Current : DC10A/cm2¡Ë

Composition Grade Bulk Density Hardness Electrical resistivity Flexural strength Coefficient of friction Contact voltage drop Max. peripheral speed Max. current density Features/Application
£ç/cm3 HSC ¦Ì¦¸¡¦m MPa V m/s A/cm2
Silver Graphite SX-90 6.85 18 0.05 84 M VL 20 22 Very low temperature rise and contact voltage drop. Applicable for low voltage, low current £ô£á£ã£è£ï£í£å£ô£å£ò£ó and grounds contacts.
SX-70 4.45 15 0.25 40 M VL 20 15
SX-50 3.20 15 2.70 29 M VL 20 12

¢¨Coefficient of friction ¡§ M¡Ä0.20¡Á0.25 ¡Êmeasurement condition/Slip ring : Copper, Speed : 9.0m/s, Current : 0A¡Ë
¢¨Contact voltage drop ¡§ VL¡Ä0.25V/pc and below (measurement condition/Slip ring : Copper, Speed : 9.0m/s, Current : DC10A/cm2)

Composition Grade Bulk Density Hardness Electrical resistivity Flexural strength Coefficient of friction Contact voltage drop Max. speed Max. current density Features/Application
£ç/cm3 HSC ¦Ì¦¸¡¦m MPa V m/s A/cm2
Resin bonded Graphite X-03 1.50 12 200 15 £Ì £È 54 20 Good ridability. Applicable for 100-120V high efficiency cleaners.
X-87 1.50 17 380 22 £Ì £È 54 20
X-88 1.52 14 360 20 £Ì £È 54 20
X-272 1.51 19 430 22 £Ì £È 54 20
X-09 1.52 14 260 15 £Ì £È 54 20
X-72 1.47 19 380 14 £Ì £È 48 20 Good ridability. Applicable for 100-240V high input cleaners.
X-78 1.51 17 370 22 £Ì £È 48 20
X-05 1.48 15 400 18 £Ì £È 50 20
X-06 1.50 16 360 19 £Ì £È 50 20
X-80 1.51 17 360 22 £Ì £È 48 20 Good commutation performance. Applicable for 120-240V cleaners.
X-85 1.48 20 400 14 £Ì £È 48 20
X-89 1.53 19 350 21 £Ì £È 48 20
X-93 1.50 18 640 27 £Ì £È 50 15
X-95 1.51 19 640 24 £Ì £È 50 15
X-97 1.45 19 430 14 £Ì £È 50 20
X-07 1.53 22 760 25 £Ì £È 50 15
X-73 1.52 24 920 24 £Ì £Ö£È 40 13 Good commutation performance. Applicable for 200-240V cleaners.
X-91 1.35 15 1100 17 £Ì £Ö£È 54 13
X-94 1.36 14 1200 17 £Ì £Ö£È 54 13
X-96 1.31 14 1600 16 £Ì £Ö£È 54 10 Good commutation performance. Applicable for 200-240V cleaners, small motors.
X-04 1.36 17 1600 11 £Ì £Ö£È 54 10
X-08 1.29 14 1600 14 £Ì £Ö£È 54 10
B-2 1.75 25 390 24 £Ì £È 25 8 Applicable for juicers, dryers. Moldable by press to size up to 18mm length max.

¢¨Coefficient of friction ¡§ L¡Ä¡Á0.20 (measurement condition/Current density : AC10A/cm2, Speed : 20m/s, Spring pressure : 50kPa)
¢¨Contact voltage drop ¡§ VH¡Ä3.0V/pc and over H¡Ä2.0¡Á3.0V/pc
(measurement condition/Current density : AC10A/cm2, Speed : 20m/s, Spring pressure : 50kPa)

Composition Grade Bulk Density Hardness Electrical resistivity Flexural strength Coefficient of friction Contact voltage drop Max. peripheral speed Max. current density Features/Application
£ç/cm3 HSC ¦Ì¦¸¡¦m MPa V m/s A/cm2
Carbon Graohite 107 1.62 34 100 29 £Ì £È 35 13 Comparative low resistivity.Applicable for 100-120V power tools.
C-3 1.62 35 240 24 £Ì £È 35 13
113 1.58 37 290 27 £Ì £È 35 13
C-1 1.49 30 330 13 £Ì £È 35 12 Applicable for 100-120V and 200-240V cleaners.
105S 1.55 36 390 24 £Ì £È 35 18 Good commutation performance, wear resistance. Good breaking action. Applicable for 100-120V and 200-240V power tools and cleaners.
TX-174 1.55 36 390 24 £Ì £È 35 18
108 1.55 36 390 24 £Ì £È 35 18
110 1.54 37 350 20 £Ì £È 35 13
118 1.64 34 390 23 £Ì £È 35 18
115 1.64 37 410 22 £Ì £È 35 18
106 1.52 33 680 15 £Í £Ö£È 35 13 Good commutation performance and wear resistance.Applicable for 200-240V cleaners.
111 1.61 37 600 23 £Í £Ö£È 35 13
114 1.62 35 900 20 £Í £Ö£È 35 13 Good commutation performance. Applicable for 200-240V power tools and washing machines.
116 1.62 35 900 20 £Í £Ö£È 35 13 Good commutation performance and wear resistance. Applicable for 200-240V power tools.
119 1.59 44 1300 20 £Í £Ö£È 35 13 Good commutation and sliding performance. Applicable for 200-240V power tools and washing machines.
B-1 1.75 18 450 13 £Ì £È 25 8 Applicable for small power tools and juicers. Moldable by press size to up to 12mm max.
C-2 1.55 32 660 17 £Ì £È 25 10 Applicable for small power tools and juicers. Moldable by press size to up to L15mm max.
C-2N 1.58 34 660 14 £Ì £È 25 10 Applicable for small power tools and juicers. Moldable by press size to up to L15mm max. Better noise prevention and film adjusting effect than C-2.
FX-08 1.66 31 590 19 £Ì £È 25 10 Applicable for small power tools and juicers. Moldable by press size to up to 18mm max. Better noise prevention and film adjusting effect than C-2.

¢¨Coefficient of friction ¡§ M¡Ä0.20.¡Á0.25     L¡Ä0.20 and below
(measurement condition/Current density : AC10A/cm2, Speed : 20m/s, Spring pressure : 50kPa)
¢¨Contact voltage drop ¡§ VH¡Ä3.0V/pc and over     H¡Ä2.0¡Á3.0V/pc
(measurement condition/Current density : AC10A/cm2, Speed : 20m/s, Spring pressure : 50kPa)
The max speed and current density vary depending on the commutator and slip ring condition and use condition.
The above applications are some examples. Please contact our sales department to consult on selecting the most appropriate grade.