Commutator Check

Commutator:

1. Place the armature on a pair of V-blocks, and check the deflection by using a dial gauge.
Standard value: 0.05 mm (0.0020 in.)
Limit: 0.1 mm (0.004 in.)

Commutator:

2. Check the outer diameter of the commutator.
Standard value: 29.4 mm (1.158 in.)
Limit: 28.4 mm (1.118 in.)

Commutator:

3. Check the depth of the undercut between segments.
Standard value: 0.5 mm (0.020 in.)