English 
Product Description
| thing | describe |
| Design/Size | According to customer's drawings or samples |
| Material |
Aluminum: 6061, 6063, 6082, 7075, 5052, A380, etc. Stainless steel: SS201, SS301, SS303, SS304, (SS304 food grade), SS316, SS316L, SUS430, SS416 Steel: low carbon steel, carbon steel, 4140, 4340, Q235, Q345B, 20#, 45#, etc. Alloy steel (15Cr, 20Cr, 42CrMo), etc. Brass: HPb63, HPb62, HPb61, HPb59, H59, H68, H80, H90, etc. Copper, bronze, copper, etc. Titanium: TC4 (TiAl6v4, Grade f5) Plastic: ABS, PC, PE, POM, Delrin, Nylon, Plastic, PP, PEI, Peek, etc. |
| process | CNC machining, turning, milling, stamping, turning, cutting, etc. |
| Delivery time | Samples usually take 3-7 working days, and mass production will be carried out according to the detailed quantity after sample approval. |
| Surface treatment | Transparent anodizing, color anodizing, chemical coating, brushing, passivation, polishing, chrome plating, sandblasting, laser engraving, zinc plating, black oxide, nickel plating, chrome plating, carburizing, heat treatment, painting |
| Test equipment | Coordinate measuring machine (CMM), 2D measuring instrument, projector, altimeter, micrometer, thread gauge, hardness tester, caliper, pin gauge, salt spray tester, concentricity measuring instrument, spectrometer. |
| Quality Management System |
ISO 9001:2015 ISO 13485:2016 |
| application | Auto parts, machinery parts, computer parts, medical parts, home appliance parts, electrical parts, electronic product parts, electronic parts, generator parts, alternator parts, generator parts, stationery, power switches, micro switches, construction, merchandise and A/V equipment. |
| File Format | Solidworks, Pro/Engineer, CAD, PDF, JPG, DXF, IGS |
| Package | Inner plastic bag, outer standard carton, or as per customer's requirements |
| Shipping | Sea freight, air freight, international express (DHL, FedEx, TNT, UPS). |
| Serve | The professional foreign trade team provides enthusiastic and fast response services. Dimensional inspection report/Raw material certificate/Surface treatment report/Engineering drawing RoHS report/Salt spray test report/Hardness test report |
Motor Rear End Cover – Casting & Precision Machining
Product Introduction
This is a cast aluminum alloy rear end cover for electric motors, a key structural component for support, sealing, positioning, and heat dissipation. Manufactured via precision casting + full aging treatment, it delivers high strength, stable dimensions, and excellent heat dissipation. The surface is sandblasted to a consistent finish, free of casting defects. Critical dimensions are tightly controlled for reliable motor assembly.
Manufacturing Process
- Precision Casting
Molded to net-shape geometry with uniform wall thickness, eliminating blowholes, sand inclusions, and burrs.
- Full Aging Treatment
Relieves casting stress and enhances long-term dimensional stability.
- Blank Inspection
Full check of appearance, casting quality, and machining stock.
- Reference Setup & Fixturing
Precision fixturing based on casting datums to ensure alignment.
- Rough → Semi-finish → Finish Machining
Progressive cutting to achieve contours, grooves, fillets, and chamfers.
- Deburring & Surface Finishing
Gentle deburring + standardized sandblasting.
- Full Dimensional Inspection
100% inspection of critical and symmetrical dimensions.
- Protected Packaging & Delivery
Key Manufacturing Challenges
- Unbalanced casting stock and part distortion
Casting variations affect locating and dimensional stability.
- Zero tolerance for casting defects
Defects cause noise, leaks, or premature bearing failure.
- Tight draft angles and deep grooves
Prone to deflection and inconsistent dimensions.
- High concentricity & symmetry requirements
Directly impacts motor vibration, noise, and service life.
- Consistent surface finish
Uneven sandblasting degrades appearance and heat dissipation.
Our Solutions
- Casting stability
Optimized gating & molding; 100% blank sorting; adaptive CNC programming.
- Defect control
Strict casting discipline + incoming inspection to block non-conforming parts.
- Precision machining
High-precision CNC, dedicated cutters, small depths of cut, high RPM, and in-process compensation.
- Assembly accuracy
Single-setup machining for critical surfaces; symmetric dimension verification.
- Surface consistency
Standardized sandblasting parameters for uniform quality.
Our Advantages
- One-stop casting + precision machining service
- Specialized in motor components, understands assembly requirements
- Full-process quality control, stable dimensions, low rejection rate
- Supports small-batch, multi-item, customized production
- Reliable lead times to match motor assembly schedules
