Hitachi

STANDARD WHEN NEW

Mica Depth 0.5 - 0.8 mm (0.02 - 0.03 in)
Commutator Runout 0 - 0.02 mm (0 - 0.0008 in)
Commutator O.D. 40.0 mm (1.57 in)
Brush Length 14.5 - 15.5 mm (0.57 - 0.61 in)
Brush Spring Tension 13 Nm (2.86 lbs)

SERVICE LIMIT

Mica Depth 0.2 mm (0.008 in)
Commutator Runout 0.05 mm (0.002in)
Commutator O.D. 39.0 mm (1.54 in)
Brush Length 11.0 mm (0.43 in)
Brush Spring Tension 13 Nm (2.86 lbs)