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Brush Grade
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Spec. Res. Ω-in. （μΩ·m）
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Dens. g/cm³
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Trans. Strength lbf/in² （kgf/cm² ）
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Con- tact Drop
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Fric- tion
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Surface Speed ft/min (m/sec)
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Normal Current Density A/in² (A/cm² )
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Description and Application
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Recommended for:
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AY
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0.0004 (10)
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1.68
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3000 (211)
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H
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M
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4000 (20)
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80 (12.5)
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Steel or bronze field rings of synchronous motors and wound rotor motor rings up to 100 APSI and up to 4000 ft/min.
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B344
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0.0008 (20)
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1.65
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3700 (260)
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H
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M
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6000 (30)
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80 (12.5)
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Low voltage battery lift trucks where low contact drop is required.
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D
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0.0005 (13)
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1.65
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4200 (296)
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H
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M
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5000 (25)
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80 (12.5)
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Steel and cast iron slip rings.
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DE2
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0.0021 (53)
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1.64
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3700 (260)
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VH
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L
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8000 (41)
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80 (12.5)
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Smaller diesel-electric locomotive main generators and auxiliary equipment motors and generators.
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DE25
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0.0025 (64)
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1.69
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4200 (296)
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VH
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L
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10000 (51)
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80 (12.5)
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Traction and hoist motors operating under severe conditions of temperature and low humidity.
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DE3
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0.0020 (51)
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1.62
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4500 (317)
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VH
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L
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8000 (41)
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80 (12.5)
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Transit traction motors.
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DE7
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0.0025 (58)
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1.67
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4400 (310)
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VH
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L
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10000 (51)
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80 (12.5)
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Traction motors and wheel motors in off highway vehicles where high loads and low humidity are present. Also suitable for motors in transit applications.
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DE7000
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0.0020 (51)
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1.67
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5500 (387)
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VH
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L
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10000 (51)
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80 (12.5)
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Diesel-electric traction motors providing good commutation and long life.
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DE8
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0.0020 (51)
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1.70
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5000 (352)
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VH
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L
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8000 (41)
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80 (12.5)
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Larger diesel-electric locomotive main generators,and other auxiliary equipment motors and exciters.
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DE869
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0.0013 (36)
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1.71
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4000 (282)
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H
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M
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6000 (30)
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70 (11)
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Brass collector rings,also used for medium commuting service.
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DE9000
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0.0020 (51)
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1.68
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5500 (387)
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VH
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L
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10000 (51)
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80 (12.5)
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High speed locomotive traction motor applications.
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F799
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0.0035 (76)
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1.65
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2800 (197)
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VH
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M
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7000 (36)
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70 (11)
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Applications where friction chatter is encountered.
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G
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0.0013 (36)
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1.65
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3300 (232)
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VH
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M
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6000 (30)
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70 (11)
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Medium-duty commuting service.
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N19
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0.0025 (58)
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1.61
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2800 (197)
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VH
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L
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8000 (41)
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75 (12)
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Medium to low current density applications with normal commutation requirements.
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N38
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0.0020 (51)
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1.70
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5000 (352)
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VH
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L
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8000 (41)
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80 (12.5)
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Industrial generators and exciters where long life is necessary. Exceptional ability to maintain film under lightly loaded conditions.
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N39
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0.00075 (19)
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1.77
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4700 (331)
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VH
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L
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10000 (51)
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80 (12.5)
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Slip rings where a stabilized film is critical and long life is necessary.
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N44
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0.0024 (61)
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1.50
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1500 (106)
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VH
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L
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10000 (51)
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80 (12.5)
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High commuting applications from large heavy duty motors and generators to less critical applications.
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N48
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0.0028 (71)
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1.58
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2000 (141)
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VH
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L
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10000 (51)
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80 (12.5)
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Where excellent commutation is required and sustained high loads are present.
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N6000
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0.0026 (66)
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1.55
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2800 (197)
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VH
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L
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8000 (41)
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80 (12.5)
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Low or variable humidity conditions and where long periods of light loading are a factor. Slight polishing action,also controls film in heavily loaded applications.
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