Commutator Testing
- Clean surface and polish with No. 400 sandpaper if required. If surface is scored, out of round or pitted, turn commutator in a lathe.
- Maximum commutator runout and minimum diameter of commutator must not exceed specification after turning. See COMMUTATOR SPECIFICATIONS table.
- Commutator mica undercut depth should be .02 -.03" (.5 -.8 mm). Minimum mica undercut depth is .008" (.20 mm). If not within specification, undercut to standard depth.
COMMUTATOR SPECIFICATIONS
| Application | Maximum Runout In. (mm) | Minimum Diameter In. (mm) | |
|---|---|---|---|
| B2200 (M/T) | |||
| Protege (M/T) & 323 | .004 (.10) | 1.22 (31) | |
| Miata | .001 (.03) | 1.22 (31) | |