Stator and Rotor Core · Technical Details
Motor Core Technical Specifications
Materials and Coatings
Quality controlled at the raw material source to ensure stable and reliable performance for every core.
Premium raw materials
- A00 Aluminum Ingot, High Purity, Low Impurities
- Silicon steel grade: 50WW470 / 50WW600 / 35WW300, etc.
- All materials include a Certificate of Conformance (COC).
Inorganic Insulating Coating
- Silicon steel sheets with inorganic insulation coating process
- Strong coating adhesion; won't peel off.
- Reduces iron losses and improves motor efficiency
Full-roll production
- Manufactured using full-coil silicon steel
- Never use offcuts or recycled materials.
- Ensure product consistency and reliability from the source
Manufacturing Process
From stamping to die-casting, every process is executed with meticulous precision.
Customize from image
Manufactured strictly per customer drawings or samples. Standard sizes range from 20mm to 400mm; custom non-standard options available.
Multiple fastening options available
Clamp, rivet, weld, or self-adhesive — selected flexibly based on customer requirements, drawings, and specific product needs.
Precision stacking control
Apply different pressure based on the product: for an outer diameter of 11 mm, use a 5-ton hydraulic press to avoid damaging the insulation coating.
Safe Welding Procedures
The welding process avoids localized high temperatures to preserve the magnetic properties of silicon steel sheets, ensuring welds are free from voids or overheating risks.
A00 Aluminum Die Casting
The rotor die-casting uses A00 aluminum ingots, followed by deburring and cleaning.
Dynamic balance G2.5 grade
Post-casting rotor dynamic balance meets G2.5 grade, satisfying high-speed motor operating requirements.
Quality & Testing
End-to-end quality control to ensure delivered products meet the highest standards.
100% Factory Inspection
Comprehensive inspection of dimensions, appearance, and stacked thickness, with sample iron loss testing and a full test report provided.
Defect Rate Control
Internal defect rate is controlled below 0.3%. Re-makes will be performed for issues such as dimensional non-compliance and excessive burrs.
Finished Cleaning
Oil-free and free of metal shavings; clean surface meets precision assembly requirements.
Certification & Compliance
All certifications can be verified on the official platform. Certificate numbers are included with your shipment.
| Certification/Standard | Certificate Number | Issuing Authority | Expiration | Verification Method |
|---|---|---|---|---|
| ISO 9001:2015 Quality Management System | CN24/10001 | SGS | 2024.01 - 2027.01 | SGS Official Certificate Verification System |
| ISO 14001:2015 Environmental Management System | CN24/20015 | SGS | 2024.01 - 2027.01 | SGS Official Certificate Verification System |
| IATF 16949:2016 Automotive Quality Management System | CN4/00287 | TÜV Rheinland | 2023.06 - 2026.06 | TÜV Official Certificate Database |
| RoHS Compliant (EU 2011/65/EU) | SGSRoHS-2024-03156 | SGS | 2024.03 - 2026.03 | SGS Test Report Lookup |
| REACH Compliance (EC 1907/2006) | SGSREACH-2024-04221 | SGS | 2024.04 - 2026.04 | SGS Test Report Lookup |
Audit Report and Supervision Records
SGS Annual Surveillance Audit
- Last review date: 2025-1-15 to 17
- Audit Scope: End-to-end design, manufacturing, and inspection of stator and rotor cores
- Audit Conclusion: Compliant with ISO 9001:2015 requirements; no major non-conformities found.
- Report ID: SGS-AUD-2025-0115-CN
TÜV Client Second-Party Audit
- Review Customer: Bosch Motor Division, Germany
- Review Date: 2024/10/22 - 24
- Audit Score: Grade A (92/100)
- Report ID: BOSCH-AUD-2024-Q4-DE
Note: The certificate numbers and audit report information listed above can be verified on the respective organization's official website. For copies of certificates or detailed reports, please contact our sales team.
Packaging & Delivery
Professional packaging solutions and flexible delivery policies
Packaging Options
Rust prevention
Finished products are coated with stamping oil for rust prevention. For ocean export, they are packed in rust-proof paper and wooden crates, ensuring rust protection for more than 3 months.
Flexible packaging
Stator and rotor cores are packaged separately to meet diverse transportation and storage requirements.
Order Details
Product Photography
Real factory footage showcasing product details and quality
Need a customized solution?
Provide drawings or samples, and we'll create a customized optimal solution for you.