Martindale’s Commutator Grinders are a complete line of commutator grinding tools.  The three salient factors in choosing a commutator resurfacing tool are:

1. Commutator bar length (or width of slip ring) matched to grinding capacity of the tool.

2. Access area matched to dimensions of tool to ensure working clearance.

3. Diameter of brush stud matched to fit diameter of support used with tool.

Click here to download Martindale Commutator Grinders (6.3M / PDF)