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Motor Laminations — Precision Stamped Laminations for Drone & BLDC Motors | Reenives Stator Core Supplier
⚠️Are your motor laminations causing high core loss, excess heat, or poor stacking? Inconsistent lamination thickness, burrs, weak interlocking, or poor insulation coating can reduce motor efficiency and lead to premature failure — especially in high-RPM drone motors.
✅Reenives produces motor laminations engineered for high-performance brushless motors. With imported high-speed stamping lines, epoxy powder coating, and dust-free workshops, we deliver laminations with low core loss, tight tolerances, and clean edges. As a leading drone motor laminations supplier in China, we help 1000+ enterprises improve motor reliability.
📋 Table of Contents
What Are Motor Laminations?
Motor laminations are thin sheets of electrical steel (silicon steel) stamped into specific shapes and stacked to form the magnetic core of a motor — either the stator, the rotor, or both. Each lamination is coated with a thin insulation layer to limit eddy currents between layers, which is essential for efficient high-frequency operation.
In drone motors, motor laminations are the foundation of the electromagnetic circuit. Their material grade, thickness, stamping quality, and coating directly determine:
- Core loss & motor efficiency
- Heat generation & thermal performance
- Stacking factor & magnetic flux density
- Mechanical strength & vibration resistance
For drone motors operating at high RPM, high-quality motor laminations are essential to minimize eddy currents and maintain efficiency.
Precision motor laminations — manufactured by Reenives with imported high-speed stamping & epoxy powder coating lines.
Types of Motor Laminations
Motor laminations come in different designs and materials, each suited to specific motor requirements. Reenives manufactures the following types:
- Stator Laminations — Slotted ring-shaped laminations that hold the windings and form the stationary magnetic circuit.
- Rotor Laminations — Laminations for the rotating part, often with permanent magnet slots or squirrel-cage features.
- Segmented Laminations — Individual teeth stamped separately for separate winding, then assembled into a full core. Higher slot fill factor.
- One-Piece Laminations — Traditional full-ring lamination design, cost-effective for medium to high-volume production.
- Bonded Laminations — Laminations coated with adhesive and bonded under heat and pressure, reducing eddy current losses.
- Epoxy-Coated Laminations — Individually coated with epoxy powder for superior insulation, corrosion resistance, and wire adhesion.
- Custom Laminations — Private mould development for unique slot counts, outer diameters, and tooth profiles.
Whether you need standard 0.20 mm or 0.50 mm laminations, Reenives can supply the right solution.
Key Specifications & Data
Below are typical specifications for Reenives motor laminations. Custom values are available upon request.
| Parameter | Typical Range / Value | Notes |
|---|---|---|
| Lamination Material | Silicon steel (e.g., 35WW250, 50WW470) | Low core loss grades |
| Lamination Thickness | 0.20 mm – 0.50 mm | Thinner = lower eddy current loss |
| Outer Diameter | 20 mm – 200 mm | Customizable |
| Inner Diameter | 10 mm – 180 mm | Depends on rotor design |
| Stack Length | 5 mm – 80 mm | Affects torque & power |
| Slot Number | 6, 9, 12, 18, 24, etc. | Matches pole count |
| Insulation Coating | Epoxy powder coating | Uniform, pinhole-free |
| Core Loss (at 400Hz, 1T) | ≤ 25 W/kg | Material dependent |
| Tolerance | ±0.05 mm (critical dimensions) | High-precision stamping |
| Burr Height | ≤ 0.03 mm | Clean edges for stacking |
Data source: Reenives internal testing & supplier material datasheets, 2024. Actual values may vary by design.
Applications of Motor Laminations
Reenives motor laminations are used across a wide range of drone and brushless motor applications:
- FPV Racing Drones — High RPM, lightweight laminations with low cogging torque.
- Cinematic & Photography Drones — Smooth, vibration-free laminations for stable aerial footage.
- Agricultural Spraying Drones — Corrosion-resistant epoxy-coated laminations for harsh chemical environments.
- Industrial Inspection Drones — High-torque laminations for long endurance and heavy payloads.
- eVTOL & UAV Propulsion — Custom high-power laminations for next-generation air mobility.
- General BLDC Motors — Fans, pumps, robotics, power tools, and automotive actuators.
Reenives motor laminations power FPV, agricultural, cinematic, and industrial UAVs worldwide.
How to Select the Right Motor Laminations
Choosing the correct motor laminations for your application involves several engineering decisions. Follow these steps:
- Determine Required Torque & RPM — Higher torque needs more stack length or larger diameter. High RPM demands thinner laminations and low-loss material.
- Select Slot/Pole Combination — Common drone motors use 12S/14P or 9S/6P. This affects cogging torque, winding factor, and efficiency.
- Choose Lamination Thickness — For high-frequency operation (e.g., 400Hz+), use 0.20 mm laminations to reduce eddy current losses.
- Select Material Grade — Lower-loss silicon steel grades (e.g., 35WW250) reduce heat but cost more. Balance performance and budget.
- Decide on Stator vs. Rotor Laminations — Stator laminations hold windings; rotor laminations hold magnets or cage bars. Each has distinct design requirements.
- Consider Insulation & Coating — Epoxy powder coating is recommended for moisture, vibration, and chemical resistance.
- Verify Tolerances & Burr Height — Tight tolerances and minimal burrs ensure proper stacking and reduce vibration.
- Request Samples & Test — Reenives provides free samples for qualified projects. Test core loss, temperature rise, and mechanical fit.
FAQ — Motor Lamination Parameters
Q1: What lamination thickness do you recommend for high-RPM drone motors?
A: For high-RPM drone motors (above 10,000 RPM), we recommend 0.20 mm or 0.25 mm silicon steel laminations. Thinner laminations significantly reduce eddy current losses, which helps keep the motor cool and improves efficiency. For lower RPM applications, 0.35 mm or 0.50 mm can be more cost-effective.
Source: Reenives engineering team, based on motor design guidelines and material datasheets.
Q2: What is the typical core loss of your motor laminations?
A: Our standard motor laminations using 35WW250 silicon steel typically exhibit core loss ≤ 25 W/kg at 400Hz and 1 Tesla. With premium low-loss materials, we can achieve even lower values. Actual core loss depends on lamination thickness, material grade, and operating frequency.
Source: Reenives internal testing data, 2024.
Q3: Do you offer epoxy powder coating for motor laminations?
A: Yes. We use imported epoxy powder coating equipment to apply a uniform, pinhole-free insulation layer on individual laminations. This coating improves corrosion resistance, enhances wire adhesion, and protects against moisture — critical for agricultural and marine drones.
Source: Reenives production specification.
Q4: What is the dimensional tolerance and burr height of your motor laminations?
A: For critical dimensions such as inner diameter, outer diameter, and slot dimensions, we maintain tolerances of ±0.05 mm. Burr height is controlled to ≤ 0.03 mm to ensure clean stacking and reduce vibration. Tighter tolerances can be achieved upon request with our high-precision stamping lines.
Source: Reenives quality control standards.
Q5: Can you develop custom motor laminations for my specific drone motor?
A: Absolutely. We support private mould development. Provide us with your required outer diameter, inner diameter, stack length, slot number, tooth profile, and any mounting features. Our R&D team will design and produce custom laminations tailored to your motor. Tooling lead time is typically 15–25 days.
Source: Reenives custom development process.
Q6: What is the minimum order quantity (MOQ) for motor laminations?
A: For standard designs, our MOQ is flexible — we support bulk purchasing as well as sample orders. For custom private mould projects, MOQ depends on the tooling and design complexity. Please contact us with your requirements for a precise quote.
Source: Reenives sales policy.
Summary — Get Your Motor Laminations Quote Today
Ready to Improve Your Motor Performance with Precision Laminations?
Reenives is a leading drone motor laminations supplier in China with 4 years of manufacturing experience, 100+ R&D patents, and 3 production bases. We serve 1000+ enterprises worldwide with high-precision motor laminations for UAV and BLDC motors.
📦 Bulk purchasing · 🔧 Private mould development · 🧪 Free samples
🌐Official Website:www.reenives-bldcmotor.com
📧 Email: linda_reenives@163.com
Contact us now for a free sample and tailored solution for your production scenario.
Dongguan Runlu Motor Technology Co., Ltd.
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 develop, 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!
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