| |
|
Physical
and functional characteristics of various qualities of materials
for collecting brushes
|
|
|
Group
of semimanu-factured
|
Mark
|
Appearent
density
|
Hardness
Rockwell
|
Broken
resistivity at flexure
|
Resistivity
|
Falling
voltage
|
Friction
coefficient
|
Medium
wear speed
|
|
|
g/cm³
|
HR
10/60
|
MN/m²
|
mWm
|
2Uc
|
m
|
WE
|
|
0
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
|
BAKELIT
GRAPHIT
|
BGR
- 1
|
1,6...1,8
|
90...110
|
26
|
100...140
|
2,1...3,6
|
0,2
|
5
|
|
BGR - 2*
|
1,58...1,7
|
65...100
|
23
|
220...280
|
2,5...5,0
|
0,3
|
10
|
|
BGR
- 3
|
1,6...1,8
|
70...100
|
30
|
130...170
|
2,5...4,2
|
0,3
|
12
|
|
BGR
- 4
|
1,6...1,8
|
65...100
|
25
|
170...190
|
2,5...5,0
|
0,3
|
12
|
|
BGR
- 5
|
1,6...1,8
|
65...100
|
32
|
190...250
|
3,2...4,0
|
0,3
|
12
|
|
|
-materials
used in motor-vehicles industry |
|
*
|
-used in
industrial applications |
|
|
