EV Motor and Rotor Laminations with Oil Holes

Designed to address the unique processing requirements of EV Motor and Rotor Laminations with Oil Holes drilling, this single-row progressive die integrates 22-34 stamping stations (including rotary indexing and micro-hole drilling modules) in a reinforced anti-vibration frame, delivering consistent component quality with a dimensional tolerance of ±0.004mm—critical for NEV motor heat dissipation (oil hole flow rate ≥1.2 L/min) and rotational stability (runout ≤0.008mm).

Built on Deaote's 15+ years of expertise in precision mould manufacturing for the automotive motor industry, our large rotary single-row die features wear-resistant SKH-51/DC53 steel components with TiCN coating (hardness ≥65 HRC), ensuring a service life of 800,000+ stamping strokes (2.2x longer than standard dies) and zero precision degradation during high-speed production. The optimized large rotary mechanism (rotation angle 0-180°) enables one-step forming of complex rotor profiles, while the integrated micro-drilling module achieves precision oil hole processing (Ø0.8-2.5mm, positional accuracy ±0.01mm)—essential for NEV motor heat management and extended service life (≥150,000 km for traction motors).

Manufactured under IATF 16949:2016 and ISO 9001:2015 quality standards, the die is fully compatible with high-speed automated stamping lines (50-85 strokes per minute) and features integrated in-die vision inspection systems for real-time quality control of oil hole position and stator lamination burrs (≤0.007mm). Compatible with all major NEV motor brands (Tesla, BYD, Volkswagen, Hyundai), it seamlessly integrates into global NEV component manufacturing systems, reducing production scrap rate to 0.07% compared to conventional multi-process dies.

Product Series

DT-SRLR1 Series (Passenger NEV Traction Motor)

±0.004mm accuracy, 800,000 strokes life, 40-150kW motor cores. Oil hole Ø0.8-1.8mm, ideal for BEV/PHEV passenger car motor production.

DT-SRLR2 Series (Commercial NEV Traction Motor)

±0.005mm accuracy, 750,000 strokes life, 150-250kW motor cores. Oil hole Ø1.5-2.5mm, suited for electric bus/truck motor production.

DT-SRLR-Custom Series (OEM NEV Motor)

Tailored accuracy (±0.003-0.006mm), custom rotary angle (0-270°), oil hole Ø0.6-3.0mm. Designed for brand-specific NEV motor production.

Core Advantages

1. Large Rotary Mechanism for Complex Rotor Forming

Integrated high-precision rotary indexing mechanism (rotation repeatability ±0.002°) enables one-step forming of NEV rotor complex profiles (eccentricity ≤0.005mm), eliminating multi-process manual repositioning and reducing production lead time by 35%. The rigid rotary drive system ensures stable operation at 50-85 SPM, maintaining consistent precision for 24/7 mass production of NEV rotor components.

2. Precision Oil Hole Drilling for NEV Motor Heat Dissipation

Integrated micro-drilling module with diamond-coated drill bits achieves precision oil hole processing (Ø0.8-2.5mm, positional accuracy ±0.01mm) during stamping, ensuring oil flow rate ≥1.2 L/min for effective heat dissipation of NEV traction motors (operating temperature ≤180°C). This integrated design eliminates post-stamping drilling processes, improving production efficiency by 40% and reducing oil hole defect rate to 0.02%.

3. NEV-Grade Precision for Stator Lamination Uniformity

7-axis CNC machining with ±0.0007mm positioning accuracy and in-die laser gauging systems ensure stator lamination dimensional tolerance of ±0.004mm—critical for stator core stacking uniformity (parallelism ≤0.008mm) and NEV motor energy conversion efficiency (≥96%). Consistent precision eliminates post-stamping rework, improving production yield to 99.6% for NEV stator laminations.

4. High-Hardness Coated Tool Steel for Extended Service Life

Core die components made of SKH-51 (high-speed steel) and DC53 (high-strength steel) with TiCN coating (hardness ≥65 HRC) deliver 800,000+ stamping strokes—2.2x longer than standard dies (360,000 strokes). The TiCN coating provides high-temperature resistance (up to 480°C) and wear resistance, extending maintenance intervals to 200,000 strokes (vs. 75,000 for conventional dies).

5. Full Compatibility with NEV Manufacturing Standards

Compliant with IATF 16949:2016 automotive quality standards and fully compatible with automated material feeding, stacking, and traceability systems (laser marking integration). The die supports non-grain-oriented (NGO) silicon steel (0.3-0.5mm thickness) commonly used in NEV motors, meeting global material requirements (EU REACH, US EPA, China GB/T).

6. Modular Customization for Diverse NEV Motor Requirements

Full customization of stamping stations (22-34), rotary angle (0-270°), oil hole size (Ø0.6-3.0mm), material compatibility (0.3-0.6mm silicon steel), and dimensional tolerance (±0.003-0.006mm). Optional features include in-die deburring, insulation coating compatibility, and anti-corrosion treatment—meeting global NEV OEM requirements for motor core production.

Technical Specifications

Application Scenarios

Deaote's EV Motor and Rotor Laminations with Oil Holes are engineered for global NEV motor manufacturers across diverse sectors:

● Passenger EVs: Mass production of 40-150kW stator laminations and rotor components (with oil holes) for BEV/PHEV passenger cars (sedan/SUV/hatchback)

● Commercial EVs: Production of 150-250kW stator/rotor components for electric buses, trucks, delivery vans, and light commercial vehicles

● High-Performance EVs: Custom stamping of core components for high-power EV traction motors (200-300kW) used in sports cars and racing vehicles

● OEM EV Motor Manufacturing: Custom die solutions for global EV motor OEMs (Tesla, BYD, Volkswagen, Toyota, Hyundai) for brand-specific motor production

About Deaote

Suzhou Deaote Precision Mould Co., Ltd. is a leading high-tech enterprise specializing in R&D, manufacturing, and sales of precision progressive dies for the global automotive (NEV), home appliance, HVAC, and power generation industries. With over 15 years of expertise in precision mould design and manufacturing for automotive motor cores, we serve customers across Europe, North America, Asia, and Australia in the NEV traction motor sector.

Our EV Motor and Rotor Laminations with Oil Holes are developed in our dedicated EV motor mould R&D lab, leveraging advanced 7-axis CNC machining, precision EDM, and laser texture technologies to achieve NEV motor-grade precision. We provide end-to-end customization services—from die design and prototyping to on-site installation and global technical support—ensuring our solutions meet the high-volume production requirements of global EV motor manufacturers.

Committed to "Precision in Every Stroke, Efficiency in Every NEV", Deaote invests 20% of annual revenue in R&D to develop next-generation high-efficiency dies for NEV motors. Our IATF 16949:2016 and ISO 9001:2015 certified production facility and global service network ensure fast response times (≤48 hours) and local technical support, making us a trusted partner for manufacturers of NEV traction motor core components worldwide.