Technical Carbon Plant

Graphite brushes

ZTV manufactures brushes – composed products of natural or synthetic graphite, metals, coke etc.
Depending on the material used they can be:

  • Metal – graphite
  • Coke – graphite
  • Metal – Coke – graphite
  • Electro – graphite

Brushes are produced on documentation, particular assignment, sample or size, dimensions of brushes and terminals and type of the characteristics as specified in draft 1-3 and table 1-2.

Nominal Dimension of the Brushes The radial dimension “r” will be chosen from the table based on the tangentional dimension “t” and axial dimension “a”
Dimension: (mm)
1,6
2
2,5
3,2
4
5
6,3
8
10
12,5
16
20
25
32
40
50
64
80
100
125
a
x
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
x
x
x
x
t
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
x
x
x
x
r
x
x
x
x
x
x
x
·
·
·
·
·
·
·
·
·
·
·
·
·
NOTE: Smaller or bigger size than the one in the table is possible. 
Types of Brushes Depending on the reciprocal orientation of the surfaces and on the location of the current wires the following types of brushes are manufactured
Structure and dimensions of the tipes of brushes curent wires
ZTV SA manufactures all types of graphite brushes

Ready production

          

Machine treatment workshop

Preparatory workshop

Technical characteristics of the brushes
Physical and mechanical properties
Collector characteristics
Type
Rockwell hardnes10 N/m²
Specific electric resistance10 Ωm
Current load10 A/m²
Circum velocitym/s
Brush pressu- re on collector10 N/m²
Transitional vol- tage drop on a pair of brushesV
Max. friction factorµ
Copper-graphite
M4
4 - 18
0,10 - 0,25
20
20
200 - 250
0,20 - 0,40
0,20
M7
10 - 20
0,075 - 0,16
18
40
150 - 200
0,70
0,20
M10
6 - 17
0,08 - 0,15
20
20
200
0,15 - 0,30
0,20
M18
14 - 35
0,35 - 0,80
20
20 - 25
200
1,0 - 1,5
0,20
M25
11 - 32
0,80 - 1,50
12 - 25
20 - 25
200
1,0 - 1,5
0,20
M30
10 - 30
1,0 - 3,0
12 - 25
20 - 25
200
1,0 - 1,8
0,20
M35
9 - 28
1,0 - 6,0
12 - 25
20 - 25
200
1,0 - 1,8
0,20
M50
9 - 25
4,0 - 15,0
12
25
200
1,0 - 2,0
0,20
Carbon-graphite
B1
8 - 22
12,0 - 20,0
8
20
150 - 200
1,5 - 2,2
0,25
B1A
9 - 23
16,0 - 25,0
8
20
150 - 200
0,25
Silver-graphite
СГ1
20 - 32
0,05 - 0,10
15
5
300
1,5
СГ210 - 16158351,5
Electro-graphite
EG4
2 - 6
6.0 - 16.0
12
60
20
0.25
EG14
8 - 30
20.0 - 38.0
12
45
40
0.25
EG2A
8 - 21
11.0 - 27.0
12
50
25
0.23
EG61A
20 - 65
36.0 - 72.0
17
60
40
0.15
EG841
40.0 - 80.0
17
55
40
0.17
EG74
15 - 55
35.0 - 75.0
15
50
40
0.22
Note: The production list includes also brushes made of imported electro-graphite materials applicable for electrical mashines with medium and commutation duty and for contact rings and brushes made of imported hard carbon materials at BUYER’S request.