CARBON BRUSH GRADES SPECIFICATION
Sr.No. | Description | DENSITY (gm/cc) | HARDNESS (HRB 10/40) | RESISTANCE (Micro ohm cm) | Transverse Strength (Kgf/Cm2) | Co-efficient of Friction | (A) | Carbon Graphite
| 1 | C-2 | 1.45-1.6 | 90-110 | 4000-6000 | 125-250 | M | 2 | C-4 | 1.55-1.6 | 110-120 | 6000-12000 | 250-400 | M | 3 | C-24 | 1.55-1.6 | 100-115 | 16000-30000 | 250-600 | L | 4 | C-53 | 1.5-1.55 | 85-95 | 90000-135000 | 140-180 | L | 5 | C-42 | 1.55-1.65 | 100-115 | 17000-30000 | 240-500 | L | (B) | Natural Graphite/Resin Bonded | 1 | C-40 | 1.75-1.8 | 95-105 | 8000-15000 | 100-200 | L | 2 | C-46 | 1.75-1.8 | 100-110 | 20000-28000 | 250-450 | L | 3 | C-55 | 1.55-1.7 | 85-95 | 1500-2500 | 180-250 | L | 4 | C-100 | 1.6-1.75 | 65-95 | 1500-3000 | 150-250 | L | (C) | Electro Graphite | 1 | EG-9 | 1.65-1.75 | 110-120 | 4500-6000 | 200-300 | 0.08 - 0.17 | 2 | EG-34 | 1.5-1.65 | 90-110 | 2500-3000 | 200-350 | L | 3 | EG-41 | 1.5-1.7 | 100-110 | 3500-5500 | 180-300 | M | 4 | EG-55 | 1.65-1.8 | 100-115 | 2000-3500 | 200-350 | L | 5 | EG-64 | 1.45-1.60 | 90-100 | 1600-3000 | 150-200 | L | 6 | EG-94 | 1.5-1.65 | 100-120 | 4000-7000 | 160-240 | M | 7 | EG-97 | 1.4-1.6 | 90-100 | 1600-2500 | 170-250 | L | 8 | CEG-100 | 1.5-1.65 | 40-60 | 1000-2000 | 100-130 | -- | 9 | EG-112 | 1.53-1.68 | 104-120 | 3500-6000 | 150-220 | 0.10 - 0.20 | 10 | EG-116 | 1.55-1.70 | 103-118 | 4000-5500 | 160-240 | 0.10 - 0.20 | 11 | EG-133 | 1.58-1.68 | 90-110 | 1500-2500 | 200-275 | 0.15 - 0.22 | 12 | EG-914 | 1.55-1.67 | 105-115 | 3800-5400 | 150-230 | 0.08 - 0.18 | 13 | EG-1114 | 1.60-1.72 | 110-125 | 4000-6200 | 200-280 | 0.10 - 0.20 | 14 | EG-1114X | 1.60-1.76 | 115-128 | 3000-6000 | 240-380 | -- | 15 | EG- 34 Y-3 | 1.68-1.78 | 110-125 | 1700-2700 | 200-350 | 0.10-0.15 | 16 | EG-100R | 1.60-1.75 | 75-100 | 800-1500 | 250-400 | 0.10-0.15 | 17 | EG-1114H (X2) | 1.70-1.80 | 115-125 | 3200-5200 | Above 350 | 0.10-0.15 | TRACTION GRADE | 18 | EG-1114H (X) | 1.68-1.78 | 112-122 | 3000-4800 | Above 350 | 0.10-0.15 | TRACTION GRADE | (D) | Metal Graphite | 1 | M 2445 | 2.2-2.4 | 80-90 | 800-2200 | 120-160 | Less Than 0.15 | 2 | M 4385 | 2.75-2.95 | 100-105 | 350-1200 | 160-180 | Less Than 0.20 | 3 | 4385 P | | | | | | 4 | M 4585 | 2.85-3.10 | 100-105 | 300-1000 | 180-210 | Less Than 0.20 | 5 | M 5890 | 3.55-3.62 | 100-110 | 70-150 | 300-450 | Less Than 0.20 | 6 | M 6415 | 3.75-3.85 | 95-110 | 30-80 | 350-450 | Less Than 0.20 | 7 | M 6592 | 3.9-4.1 | 90-105 | 40-80 | 3602-450 | Less Than 0.20 | 8 | M 6989 | 4.0-4.2 | 100-110 | 20-40 | 450-550 | Less Than 0.20 | 9 | M 7185 | 4.1-4.3 | 80-95 | 25-40 | 180-250 | Less Than 0.20 | 10 | M 7590 | 4.40-4.65 | 90-105 | 30-60 | 100-150 | Less Than 0.20 | 11 | M 7790/7890 | 4.65-4.80 | 95-100 | 20-40 | 150-200 | Less Than 0.20 | 12 | 7890 S | 4.50-5.00 | 70-90 | 8-30 | 350-480 | Less Than 0.20 | 13 | M 8190 | 4.95-5.2 | 85-105 | 8-15 | 550-650 | Less Than 0.20 | 14 | M 8190 S | 4.80-5.2 | 70-90 | 5-20 | 350-500 | Less Than 0.20 | 15 | M 8989 | 5.2-5.8 | 90-100 | 5-20 | 500-700 | Less Than 0.20 | 16 | M BG-12 | 5.5-6.0 | 90-110 | 30-35 | 600-750 | Less Than 0.20 | 17 | M SG-35 | 2.75-2.9 | 75-90 | 130-170 | 450-900 | ------------ | 18 | M SG-55 | 3.40-3.60 | 85-100 | 120-135 | 160-225 | ------------ | (E) | Mechanical Grade | 1 | C - 489 F | > 1.70 | 115 | | 1800 | 3.5 | 2 | CE - 106A | 2.20-2.70 | 115 | | | 0.15-0.20 |
|