Commutator Check

Commutator

Commutator:

1. Support the armature with a pair of V block and turn it to measure the runout of the surface not rubbed by the brushes using a dial gauge.

Standard value: ................................0.05 mm or less
Limit: ................................0.1 mm

Commutator:

2. Measure the diameter of the commutator

Standard value: ................................29.4 mm
Limit: ................................28.8 mm

Commutator:

3. Measure the depth of the undercut between segments.

Standard value: ................................0.5 mm
Limit: ................................0.2 mm