Reenives: Trustworthy Drone Electric Motor Stamping Supplier in China

author: Zove

2026-05-03

Precision electric motor stamping – 0.2mm cores, low loss, epoxy coated. Reenives – trusted China supplier.

Electric Motor Stamping for Drones: Precision, Trust & Performance

🔒 Reenives: Trustworthy Drone Electric Motor Stamping Supplier in China

⚠️ Inconsistent stamping quality, high eddy loss, and hidden supplier risks? For drone motor engineers, electric motor stamping is the foundation of efficiency and reliability. Poor die clearance or inferior material leads to shorted laminations, overheating, and premature failure.

Reenives has earned its reputation as a trustworthy drone electric motor stamping supplier in China. We combine advanced progressive dies, imported high-speed presses, and strict quality controls to deliver burr-free 0.20mm stator laminations with epoxy insulation. This technical guide helps buyers and engineers evaluate stamping suppliers based on verifiable parameters — and shows why Reenives is the trusted partner for UAV, FPV, and general BLDC motor manufacturing.

📑 Table of Contents

1. What Is Electric Motor Stamping?
2. Classification of Stamping Cores
3. Technical Parameters & Data Source
4. Applications: Drone & General BLDC
5. 6-Step Supplier Selection Guide
6. FAQ – Stamping Core Technical Pain Points
7. Get Free Sample & Custom Stamping Quote
8. About Reenives – Dongguan Runlu Motor Technology

📌 What Is Electric Motor Stamping?

Precision electric motor stamping stator core for drone BLDC - Reenives trustworthy supplier

Fig 1: High-precision electric motor stamping stack – 0.20mm laminations, epoxy coated (Reenives production).

Electric motor stamping is the process of blanking thin electrical steel sheets into precise shapes and stacking them to form the stator core of a BLDC motor. For drone propulsion, stamping quality determines eddy current loss, magnetic flux path, and thermal stability. Reenives employs progressive dies with clearances optimized for 0.20mm / 0.27mm / 0.35mm materials, achieving burr heights ≤0.012mm. Each lamination receives epoxy powder coating (1800VAC dielectric, class H 180°C) before stacking, ensuring reliable insulation even in high-humidity flight environments.

🏗️ Classification of Electric Motor Stamping Cores

Based on tooling and assembly method, Reenives supplies three main categories:

Segmented stamping cores – Individual teeth stamped separately, then assembled into a ring. Ideal for high-pole-count drone motors (12N14P, 24N28P) to simplify winding insertion.
Integrated ring stamping cores – Single-piece continuous laminations for maximum structural rigidity; used in heavy-lift UAVs, eVTOL, and industrial servos.
Custom geometry stamping – Skewed slots, trapezoidal slots, variable tooth profiles. Reenives supports private mould development for any custom stator design.

Our stamping capabilities cover outer diameters from 12mm to 220mm, stack heights up to 100mm, and all common slot numbers.

📊 Technical Parameters – Electric Motor Stamping Performance

All values comply with IEC 60404-2 and ASTM A34, verified by Reenives in-house metallurgical lab and SGS (2025). Primary material: 20WTG1300 (0.20mm), 27WGP1400, 35W270.

Parameter	Specification (Drone-Optimized)	Test Standard / Source
Lamination thickness	0.20mm / 0.27mm / 0.35mm ±0.005mm	Micrometer / ASTM A34
Iron loss @ 400Hz, 1.0T	≤11.2 W/kg (0.20mm grade)	Epstein frame / IEC 60404-2
Iron loss @ 1000Hz, 0.8T	≤31.0 W/kg (0.20mm)	Reenives high-frequency test
Stacking factor	≥96.8% (typical 97.2%)	Weight / volume method
Insulation coating	Epoxy powder coating, withstand 1800VAC	Dielectric test / IEC 60404-11
Thermal class	Class H (180°C continuous)	IEC 60085
Burr height (max)	≤0.012mm	Vision measurement / JIS C 2550
Outer diameter range	12mm – 220mm (custom molds)	Reenives engineering catalog

📌 Source: Reenives internal report #RV-2504 & SGS certificate. Full material COA available per batch.

✈️ Applications – Drone, UAV, FPV & General BLDC

Reenives stampings are trusted across multiple high-performance segments:

FPV racing drones – ultra-high RPM (60k+), minimal eddy loss for instant throttle response.
Agricultural & delivery UAVs – extended endurance, lower operating temperature.
eVTOL and air mobility – lightweight, high torque density cores.
Industrial servos, robotics, e-scooters, power tools – universal BLDC applications.

Drone motor assembly with electric motor stamping core from Reenives

Fig 2: Stator stamping stack integrated into a UAV propulsion motor – high stacking factor and low iron loss ensure reliable flight performance.

🔧 6-Step Guide to Choose a Trustworthy Electric Motor Stamping Supplier

Verify material and thickness capability: Does the supplier offer 0.20mm ultra-thin laminations for high-frequency drone motors? Reenives stocks 0.20/0.27/0.35mm grades.
Inspect insulation coating quality: Request dielectric test reports. Reenives guarantees epoxy coating with 1800VAC withstand and 180°C thermal class.
Check stamping precision (burr & tolerance): Burr height should be ≤0.02mm (Reenives ≤0.012mm). High burr leads to interlamination shorts and increased core loss.
Evaluate stacking factor consistency: Ask for lot samples to measure stacking factor. Reenives achieves ≥96.8% (typical 97.2%). Low stacking factor reduces magnetic flux.
Review custom tooling & lead time: Can they develop private moulds for your geometry? Reenives offers mould design, prototyping (7-10 days), and mass production with IP protection.
Assess trust signals: Certifications (ISO 9001), patents, customer references, and global shipping experience. Reenives has 100+ patents, 3 production bases, and exports to 1000+ enterprises.

✅ Reenives provides free samples for qualified OEMs, enabling you to validate iron loss, stacking factor, and thermal performance before mass production. We also support global shipping with full export documentation.

❓ FAQ – Electric Motor Stamping Technical Pain Points (Engineer Focus)

Q1: What lamination thickness is best for high-speed FPV drone motors (60,000+ RPM)?

For extreme RPM and PWM frequencies >40kHz, 0.20mm ultra-thin electrical steel is essential. Reenives’ 0.20mm grade achieves iron loss ≤11.2 W/kg @400Hz, 1.0T, reducing eddy loss by ~30% compared to 0.35mm. This directly improves flight time and reduces motor temperature.

Source: Reenives material datasheet & IEC 60404-2 high-frequency comparison

Q2: Which insulation coating do trustworthy stamping suppliers use for drone motors?

Reputable suppliers like Reenives use epoxy powder coating (15-25μm per side). It provides 1800VAC dielectric strength, thermal class H (180°C), and excellent resistance to humidity, dust, and salt spray – verified by 95% RH / 1000h testing without degradation.

Source: Reenives coating line specification & accelerated aging test report

Q3: What stacking factor should I expect from precision electric motor stamping?

High-quality stamping suppliers guarantee a stacking factor ≥96.8% (Reenives typical 97.2%). Stacking factor below 95% indicates poor interlock or excessive coating thickness, leading to reduced magnetic flux and larger motor size for the same torque.

Source: Reenives QA lot report (average of 500 samples, 2025 Q2)

Q4: Can you produce custom stamping geometries like skewed slots or non-standard diameters?

Absolutely. Reenives specializes in private mould development for any custom stator geometry – skewed slots, asymmetric tooth profiles, non-standard IDs/ODs. With over 100 R&D patents, we deliver prototype stampings in 10-15 days and production tooling in 25-30 days.

Source: Reenives custom engineering & patent portfolio (CN, US pending)

Q5: How do I verify iron loss consistency across large batches?

Trustworthy suppliers provide a Certificate of Analysis (COA) per batch, including Epstein frame test results for iron loss, stacking factor, and insulation resistance. Reenives performs random sample testing per lot using a Brockhaus MPG tester and can share raw data upon request.

Source: Reenives quality management system ISO 9001:2024

Q6: Does Reenives offer free samples and global shipping for electric motor stamping?

Yes. Reenives provides free samples for qualified R&D projects (shipping cost may apply for low volumes). We ship worldwide via DHL, FedEx (5-7 business days) or sea freight (25-35 days), handling all export documentation including China-origin certificates, commercial invoice, and customs clearance support.

Source: Reenives sales policy & recent shipments to USA, Europe, Brazil, Australia

🎯 Summary + Request Free Sample & Custom Stamping Quote

🔒 Reenives – Trustworthy Drone Electric Motor Stamping Supplier in China

✔️ 0.20mm ultra-low loss stamping ✔️ Epoxy insulation class H ✔️ Stacking factor >96.8% ✔️ Burr-free ≤0.012mm ✔️ 100+ patents ✔️ Global shipping

📩 Request Free Sample & Quote →

🌐 Official website: www.reenives-bldcmotor.com
📞 WhatsApp: +86-13377741885
✉️ Email: linda_reenives@163.com

Free technical consultation, 3D drawing review, and sample support for volume buyers. Virtual factory tour available.

🏭 Dongguan Runlu Motor Technology Co., Ltd.

⚡ Reenives – Professional Drone Stator Core Manufacturer Since 2022

Reenives is a professional drone stator core manufacturer, founded in 2022. It boasts independent research and development technologies, imported stamping & epoxy powder coating equipment production lines plus dust-free production workshops, more than 100 R&D patents, 3 production bases, a factory area of over 50,000 square meters, and a staff size of more than 500. From production to sales, we support bulk purchasing, private mould development, and samples making, and can provide tailor-made perfect solutions for your production and usage scenarios. With 4 years of manufacturing experience, we have solved the production problems related to the use of stator core in industrial production for more than 1000 enterprises. We can ship globally (with complete export qualifications). Global customers are welcome to consult, visit the factory, and obtain free samples!

🔗 Follow Reenives for stamping innovations: LinkedIn (Reenives Motor Tech), YouTube (@ReenivesStamping), Facebook (Reenives BLDC), Twitter (@Reenives_BLDC).