Grade B25 -Schunk Germany- Size : 32x40x40mm

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Mô tả

Chổi than máy ủ đồng

Size 32x40x40 mm

Thông tin vật liệu :

Grade

Material type

Voltage drop

Coefficient of friction

Test conditions

Resis- tivity µΩm

Rockwell

Bending strength N/mm²

Bulk density g/cm3

Metal content
%

HR10/40

HR5/40

B25

Bronze-graphite

0.3

—

5.50

Classification

Symbol

Voltage drop between two carbon brushes connected in series
Uü (V)

Coefficient of friction
µ

Very low

< 1.5

< 0.08

Low

1.5 – 2.2

0.08 – 0.15

Medium

2.2 – 3.0

0.15 – 0.22

High

> 3.0

> 0.22

No.	Current density A/cm²	Peripheral speed m/s	Brush pressure cN/cm²	Collector temperature °C	Related to the following fields of application of the carbon brushes
1	12	30	250	90	Stationary D.C. machines with and without commutation aids
2	12	50	250	90	Traction motors
3	10	30	200	90	Three-phase commutator motors
4	6	60	160	90	Turbogenerators and turbomotors
5	20	30	200	90	Slip-ring machines and low-voltage machines
6	16	30	200	90	Slip-ring machines and low-voltage machines
7	12	30	200	90	Slip-ring machines and low-voltage machines