Brake Drum Refinishing Specifications
Brake Drum Specs| Drum Diameter (MAX) | Cast/stamped into outside surface of drum |
| Diameter Variation (MAX) | 0.0635 mm (0.0025 in.) in 30 degrees |
| 0.0889 mm (0.0035 in.) in 360 degrees | |
| Drum Runout (on lathe) | 0.1524 mm (0.006 in.) |
| Initial Drum Machining Cuts Initial machining cuts should be limited to 0.12 - 0.20 mm (0.005 - 0.008 in.) at a time as heavier feed rates can produce taper and surface variation. | 0.12 - 0.20 mm (0.005 - 0.008 in.) |
| Finish Drum Machining Cuts | 0.025 - 0.038 mm (0.001 - 0.0015 in.) |