World Industry

Grade

Volume
density
(mean value)

Specific
elec.resist
(mean value)

Hardness
HRBSh
(mean value)

Recommen.
current
density

Circumferen-
tial velocity
(max.)

Recommen.
pressure on
brush

Tot.voltage
drop
(max.)

Coefficient
of friction
(max.)

Metal
content

Applications

Ag 35

2,60

5,75

95 HR 10/20

20

20

20-25

-

-

35

Small el. machines in measuring and regul. technics, tachodynamos 

Ag 93

6,90

0,06

90 HR 10/40

27

20

20-25

-

-

93

Small motors with low voltage in scanning and information technique