Chổi than cho Motor-Tatung 3000V Size : 45x25x60mm 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 K14Z3 Copper-graphite vl l 6 1.0 110 — 50 3.30 62   Classification Symbol Voltage drop between two carbon brushes connected in […]