1. INSPECT COMMUTATOR FOR DIRTY AND BURNT SURFACES
If the surface is dirty or burnt, correct with sandpaper (No. 400) or a lathe.
2. INSPECT COMMUTATOR CIRCLE RUNOUT
If the circle runout is greater than the maximum, correct with a lathe.
Maximum circle runout: 0.05 mm (0.0020 in.)
3. MEASURE DIAMETER OF COMMUTATOR
If the diameter of the commutator is less than the minimum, replace the armature.
Standard diameter: 30 mm (1.18 in.) Minimum diameter: 29 mm (1.14 in.)
4. INSPECT UNDERCUT DEPTH
Check that the undercut depth is clean and free of foreign particles. Smooth out the edge.
If the undercut depth is less than the minimum, correct it with a hacksaw.
Standard undercut depth: 0.6 mm (0.024 in.) Minimum undercut depth: 0.2 mm (0.008 in.)
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You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.