Who repairs large frame mining motors near me?

Submit your repair request specifying the motor HP, frame size, and voltage, we match to shops with confirmed large frame rewind capability and the crane capacity to handle your motor. Not all shops can handle motors above 500 HP.

Can a mine hoist motor be repaired or does it need to be replaced?

Mine hoist motors are almost always candidates for repair, replacement lead times for large hoist motors can be 6 to 18 months. The key is finding a shop with the DC or wound rotor AC rewind experience specific to hoist applications. Submit your details and we will match to the right shop.

What is the typical cost of repairing a large frame mining motor?

Large frame mining motor rewinds (above 200 HP) typically range from $15,000 to $100,000+ depending on HP, voltage class, frame size, and repair scope. High-voltage and specialty mining motors are quoted individually after engineering review. See our cost guide for US benchmark ranges.

Mining specialists

Electric motor repair for mining operations

Large frame or severe-duty motor down at your mine site? Find shops with mining experience, high-voltage, explosion-proof, and large frame rewind capability. Submit a request and get matched.

Mining operations run some of the largest and most demanding motors in industry, dragline motors, mill drives, conveyor systems, and hoists operating at extreme duty cycles in remote, harsh environments. Motor failures at mine sites involve enormous downtime costs and often complex logistics. Shops experienced in mining motor repair have large crane capacity, high-voltage rewind capability, and experience with the documentation and reliability requirements of mining operations.

Common motor types in mining

Typical motors in mining facilities and what to confirm before you ship or request field service.

Large frame conveyor motors (above 200 HP): Belt conveyor drives are often the highest-consequence motor in a mine, a conveyor failure stops material flow entirely. Frame sizes from 447T through 5000-series. Rewinds require large crane capacity and high-voltage capability for MV conveyor drives.
Mill and crusher motors: SAG mills, ball mills, and gyratory crushers use wound rotor or synchronous motors at very large HP. These are specialty rewinds requiring form-wound coils, high-voltage testing, and OEM specification compliance.
Explosion-proof motors (underground and surface coal): MSHA-rated explosion-proof motors for underground mining require MSHA-specific flame path and enclosure standards, different from general XP ratings. Only shops with MSHA XP experience should handle these.
Hoist and crane motors: DC hoist motors and wound rotor AC motors for mine hoists and overhead cranes are safety-critical applications. Repair must meet the original design specifications, no substitutions on slip ring, brush gear, or armature winding without engineering review.

What to look for in a mining motor repair shop

Requirements that separate shops experienced in your industry from general repair centers.

Large crane capacity (10+ tons): Mining motors above 500 HP often weigh 5,000 to 20,000 lbs. A shop without adequate crane capacity cannot safely handle these motors. Ask specifically about crane capacity and shop floor clearance.
High-voltage rewind capability: Medium-voltage mining motors (4,160V–13,200V) require form-wound coils and hi-pot testing at voltage levels most shops cannot safely achieve. Ask for references on rewinds at your specific voltage class.
MSHA experience (underground mining): MSHA-rated motors have specific enclosure requirements distinct from general XP ratings. Shops without MSHA experience may restore electrical function while violating the MSHA enclosure specification.

Common failure modes in mining applications

Failure patterns maintenance teams see most often, and what to address on reinstallation.

Thermal failure from extreme duty cycles: Mining conveyor and hoist motors often run at 100%+ of nameplate load for extended periods. Class H insulation and proper ventilation are essential; Class B insulation is insufficient for mining duty.
Dust and abrasive contamination: Coal dust, silica, and process dust enter motor enclosures in mining environments. TEFC enclosures with positive pressure purge or totally enclosed air-over designs prevent contamination-related failures.
Vibration from crusher and mill applications: High vibration from crushers and mills damages bearings and loosens winding end turns over time. Vibration isolation and periodic end-turn tightening prevent progressive damage.

Motor repair questions, mining applications

Answers to common buyer questions for mining motor repair.

Who repairs large frame mining motors near me?: Submit your repair request specifying the motor HP, frame size, and voltage, we match to shops with confirmed large frame rewind capability and the crane capacity to handle your motor. Not all shops can handle motors above 500 HP.
Can a mine hoist motor be repaired or does it need to be replaced?: Mine hoist motors are almost always candidates for repair, replacement lead times for large hoist motors can be 6 to 18 months. The key is finding a shop with the DC or wound rotor AC rewind experience specific to hoist applications. Submit your details and we will match to the right shop.
What is the typical cost of repairing a large frame mining motor?: Large frame mining motor rewinds (above 200 HP) typically range from $15,000 to $100,000+ depending on HP, voltage class, frame size, and repair scope. High-voltage and specialty mining motors are quoted individually after engineering review. See our cost guide for US benchmark ranges.