Heavy Duty M77 Carbon Brush Replacement Kit For Superior Electric DeWalt And Porter Cable Grinders 2 Pack Motor Parts N119739 879058 No Sweat Swap For Pro Level Contractors

M77 Carbon Brush Replacement Kit For Power Tool Repair Jobs
✔️ 2-Pack Motor Parts Fits DeWalt N119739 & Porter Cable Models

These aftermarket graphite contacts restore full voltage draw in corded drills, bench grinders, and heavy duty drywall rigs. They press firmly against the rotating commutator to transfer current efficiently, giving you reliable torque during framing, sheetrock taping, or concrete prep on active work sites.

✅ Measures 0.98 by 0.23 by 0.23 inches across the metal holder and graphite core
✅ Direct swap for N119739 and 879058 part numbers in Superior tools
✅ Handles 3.5 amp motors in Porter Cable drill and driver units
✅ Includes two complete brush sets for quick parallel maintenance swaps

💡 How often should you replace carbon brushes on commercial grade hammer drills?
Replacing worn graphite contacts is a handy move that stops power loss before it wrecks the armature. Swapping them out on a schedule keeps torque consistent and extends motor life.
- Measure remaining graphite length before hitting under half an inch on the stock rod
- Watch for sparking around the commutator area that signals poor electrical transfer
- Track sanding hours or concrete drilling cycles to predict optimal swap intervals
- Store spare packs in dry cabinets to prevent humidity damage before installation

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