Brush Grade Specifications

Material Classification
Grade
Apparent Density - Gm/cc
Resistivity x10-6ohm
Shore Hardness
Flexural Strength Lbs/in²
Contact Drop  - Volts
Friction
Permissible Current Density Amps/in²
Speed
FPM
Metal Content (%)
Amorphous
A-357
1.70
1,200
50
2,800
M
M
40
4,000
 
AC-3
1.64
1,100
55
3,000
M
M
50
4,000
 
A-422
1.60
800
45
4,000
M
H
40
4,000
 
Electrographite
E-100
1.68
350
34
3,600
M
VL
80
9,000
 
E-101
1.78
320
45
4,500
M
VL
80
8,000
 
E-110
1.66
1,500
60
5,000
VH
ML
80
9,000
 
E-120
1.65
1,900
60
3,700
M
L
80
9,000
 
E-125
1.56
1,700
45
4,000
VH
ML
80
9,000
 
E-130
1.50
2,500
45
3,000
VH
ML
80
9,000
 
E-146
1.65
700
60
6,100
M
L
80
8,000
 
E-149
1.78
320
45
4,500
M
VL
80
8,000
 
E-150
1.46
2,500
45
2,000
M
L
80
9,000
 
E-153
1.55
2,300
60
3,000
H
VL
80
9,000
 
E-160
1.66
380
35
3,000
L
M
80
6,000
 
E-170
1.52
2,200
50
2,900
M
L
80
9,000
 
E-172
1.56
2,200
60
3,200
M
VL
80
8,000
 
E-176
1.65
2,100
70
5,200
H
VL
80
8,000
 
E-180
1.68
1,200
65
4,000
L
L
80
8,000
 
E-186
1.45
2,600
40
1,800
H
VL
80
7,000
 
E-190
1.55
2,300
55
3,300
M
VL
80
8,000
 
E-196
1.66
1,900
75
5,300
H
VL
80
7,000
 
E-200
1.60
3,000
65
2,400
M
L
80
7,000
 
E-205
1.57
3,000
60
2,300
H
VL
80
7,000
 
E-210
1.45
600
30
1,500
M
VL
80
9,000
 
E-211
1.67
600
45
2,000
M
VL
80
8,000
 
E-220
1.58
500
30
2,000
M
VL
80
9,000
 
Soft
Graphite
G-700
1.82
400
25
2,300
H
L
65
9,000
 
G-702
1.42
1,000
15
700
H
M
65
15,000
 
G-712
1.46
1,000
18
1,000
H
M
65
15,000
 
Bakelite Graphite
G-110
1.78
1,900
35
5,500
VH
L
50
7,000
 
G-120
1.76
1,500
50
5,000
M
VL
50
6,000
 
G-130
1.75
10,000
25
3,600
VH
L
40
6,500
 
G-140
1.75
80,000
55
4,500
VH
L
40
7,000
 
G-150
1.73
17,000
55
5,200
VH
VL
40
6,000
 
G-160
1.85
900
15
4,000
M
L
50
5,000
 
G-170
1.52
10,000
35
2,600
VH
VL
65
6,900
 
Metal
Graphite
M-30
2.30
200
25
4,500
VL/L
L
75
8,000
30
M-50
2.95
80
30
3,200
VL
L
90
7,000
50
M-65
3.54
33
30
3,400
VL
L
105
5,000
65
M-75
4.15
13
25
4,500
VL
L
105
5,000
75
M-93
5.80
30
10
14,000
ML
L
150
3,500
94
M-103
2.60
200
40
5,200
VL
L
100
7,000
36
M-105
2.60
250
60
8,000
L
M
100
5,000
36
Silver
Graphite
S-50
3.00
70
20
3,200
VL
L
160
4,000
50
S-75
4.50
6
20
5,500
VL
L
250
4,500
75
S-85
5.50
3
15
6,000
VL
L
275
5,000
85
S-93
6.40
2
10
6,000
VL
L
300
6,500
93
AC-82
2.80
240
65
11,000
VL
L
100
7,000
40
AC-840
3.17
220
45
9,300
VL
L
100
5,000
40

 

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