Motor Shaft Machining Technology: Complete Process from Raw Material to Finished Product
Complete motor shaft machining process: material selection, rough machining, heat treatment, finishing, dynamic balancing to ensure precision and performance
2026-08-117 min
1. Motor Shaft Function and Requirements
Motor shaft is the core transmission component of motors with strict requirements:
- Torque Transmission: Withstand motor output torque
- Rotor Support: Ensure rotor rotation precision
- High Speed: Adapt to high-speed motor operation
- Long Life: Withstand repeated loads, long fatigue life
2. Motor Shaft Material Selection
Common motor shaft materials:
- 45# Steel: Most common, low cost, good performance after Q&T
- 40Cr: Important motor shafts, higher strength
- 20CrMnTi: Carburizing and quenching, high surface hardness
- Stainless Steel: Special environments (corrosion, hygiene requirements)
3. Motor Shaft Machining Process
Complete motor shaft machining process:
1. Blanking
- Sawing or shearing, leave machining allowance
- Check material certification
2. Rough Turning
- Turn OD, face, center hole
- Leave 2-3mm grinding allowance
- Ensure coaxiality
3. Heat Treatment
- Quenching and tempering: HRC 28-32
- Or carburizing: Surface HRC 58-62
- Stress relief annealing
4. Semi-Finish Turning
- Turn various OD sections
- Leave 0.3-0.5mm grinding allowance
- Machine keyways, threads
5. Grinding
- Grind bearing seats, seal seats
- Ensure dimensional precision and roughness
- Tolerance IT5-IT6
6. Dynamic Balancing
- High-speed motor shafts need dynamic balancing
- Balance grade G2.5-G6.3
- Weight removal or addition
4. Key Quality Control Points
Key quality control for motor shaft machining:
- Coaxiality: Each shaft section coaxiality ≤0.01mm
- Roundness: Bearing seat roundness ≤0.005mm
- Roughness: Bearing seat Ra0.4 or better
- Hardness: Heat treatment hardness meets requirements
- Dynamic Balance: Meet balance grade requirements
5. Common Issues and Solutions
Q: Large shaft runout?
Check center hole quality, optimize clamping, add straightening process.
Q: Fast bearing seat wear?
Increase bearing seat hardness, improve surface roughness, ensure good lubrication.
Q: Dynamic balance failure?
Check machining precision, optimize weight removal position, redo balancing.
6. Corgi Capacity Network Motor Shaft Services
Corgi Capacity Network provides professional motor shaft machining services:
- Support various motor shaft material machining
- Complete process: rough turning - heat treatment - finish turning - grinding - balancing
- Precision Shaft Machiningexperienced
- AI Smart Quote , upload drawings for 60-second quote