Leading Outrunner Brushless Motor Stator Lamination Supplier in Kazakhstan
Outrunner Brushless Motor – High-Torque Stator Laminations for Drone & UAV Propulsion
Outrunner motor torque limiting your drone's payload capacity? Stator lamination quality inconsistent? The outrunner brushless motor has become the dominant propulsion technology for drones, UAVs, and eVTOL platforms—delivering exceptional torque density, smooth low-speed operation, and direct-drive efficiency for propeller applications. As a leading outrunner brushless motor stator lamination supplier in Kazakhstan and globally, Reenives delivers precision 12N14P stator laminations with 0.2mm ultra-thin silicon steel, burr height < 0.03mm, and epoxy coating—reducing core loss by up to 30%, maximizing torque output, and enabling reliable propulsion for FPV racing, UAV logistics, agriculture, and eVTOL applications .
- • What Is an Outrunner Brushless Motor?
- • Classification of Outrunner Stator Laminations
- • Technical Specifications & Verified Data
- • Applications: Drones, UAVs, eVTOL & More
- • 6-Step Engineering Selection Guide for Outrunner Stators
- • FAQ: Outrunner Brushless Motor Technical Questions
- • Why Reenives – Leading Outrunner Brushless Motor Stator Lamination Supplier in Kazakhstan
- • Dongguan Runlu Motor Technology Co., Ltd.
What Is an Outrunner Brushless Motor?
An outrunner brushless motor is a brushless DC motor configuration where the permanent magnet rotor spins on the outside of the stator electromagnets. In this design, the stator is fixed to the motor shaft, while the rotor rotates around it. This external-rotor configuration allows the motor to contain more magnetic poles of greater strength than would be possible if the magnets had to be arranged on a smaller diameter inner space, making outrunner laminations ideal for drone direct-drive systems .
Key advantages of outrunner brushless motors:
- High torque density – Large rotor diameter provides mechanical advantage for direct-drive propellers
- Smooth low-speed operation – Excellent for drone hover and precision control
- Direct drive capability – No gearbox needed; propeller mounts directly to the rotor
- High efficiency – Eliminates gearbox losses for maximum energy efficiency
The stator lamination is the critical component that enables outrunner motor performance. For outrunner motors, stator laminations must:
- Minimize core loss to reduce heat generation at high torque
- Provide high saturation flux density for maximum torque output
- Maintain structural integrity under mechanical and thermal stress
- Ensure precise geometry for consistent air gap and smooth operation
ⓘ Outrunner insight: "Outrunner brushless motors are the preferred choice for drone propulsion because they deliver high torque directly to the propeller without heavy gearboxes—maximizing efficiency and reliability."
Reenives manufactures precision stator laminations for outrunner brushless motors using imported 0.2mm silicon steel, progressive stamping dies, and automated epoxy powder coating—enabling maximum torque density for demanding drone, UAV, and eVTOL applications .
Classification of Outrunner Stator Laminations
Reenives supplies outrunner stator laminations across four primary series, tailored to different power classes and applications:
| Series | Power Range | Stator OD (mm) | Slot/Pole Configuration | Lamination Thickness | Best For |
|---|---|---|---|---|---|
| Series A – Micro Outrunner | <500W | 12–22mm | 9N12P | 0.15–0.20mm | Micro drones, tiny whoops |
| Series B – FPV / Racing | 500W–3kW | 22–30mm | 9N12P, 12N14P | 0.15–0.20mm | FPV racing, freestyle drones |
| Series C – Mid-Power UAV | 3–15kW | 30–60mm | 12N14P, 24N22P | 0.20mm | Logistics, agriculture, camera drones |
| Series D – High-Power / eVTOL | 15–50+ kW | 60–200mm | 24N22P, 36N30P, 48N40P | 0.20mm | Heavy-lift, eVTOL, electric aviation |
Outrunner stator laminations are characterized by:
- Large diameter – Up to 200mm to accommodate high torque requirements
- Multi-pole configurations – 9N12P, 12N14P, 24N22P, 36N30P for smooth torque
- Thin laminations – 0.15–0.20mm to minimize core loss at high frequencies
- High stacking factor – ≥ 97% for maximum magnetic material density
Technical Specifications & Verified Data
All performance data below is derived from Reenives in-house laboratory testing (IEC 60404-2), third-party validation, and peer-reviewed outrunner motor research .
| Parameter | Value / Range (Reenives Standard) | Test Standard / Source |
|---|---|---|
| Stator Outer Diameter | 12–200mm (customizable) | CMM / optical comparator |
| Material Type | Non-grain oriented silicon steel (CRNGO) | Material certificates / IEC 60404 |
| Common Grades | 35PN210, 35PN250 (Nippon Steel / Baowu) | Material certificates |
| Lamination Thickness | 0.15mm / 0.20mm / 0.27mm / 0.35mm | Micrometer / IEC 60404-2 |
| Core Loss @ 1.0T, 400Hz (0.20mm) | ≤ 8.5 W/kg — 30% lower than 0.35mm | IEC 60404-2 / Reenives R&D |
| Saturation Flux Density Bs | 1.68 – 1.72 T | Epstein frame test |
| Burr Height (max) | < 0.03mm | Optical measurement |
| Epoxy Coating Thickness | 30–60 µm, dielectric > 2.5 kV | ASTM D149 |
| Stacking Factor | ≥ 97% | Weight method |
| Concentricity Tolerance | ±0.01mm – ±0.015mm | CMM measurement |
| Slot/Pole Configurations | 9N12P, 12N14P, 24N22P, 36N30P, custom | Reenives design standards |
| Winding Factor (12N14P) | 0.933 (near-perfect) | BLDC winding theory |
| Typical Outrunner Efficiency | 90–95% (with optimized stator) | IEEE Xplore / FEM simulation |
| Torque Density Improvement | 15–25% (vs. standard 0.35mm stator) | Reenives R&D / thermal analysis |
🔬 Data Source: Reenives R&D Report 2024-Q4 + IEC 60404-2 standard + Material certificates + IEEE Xplore outrunner motor studies .
Applications: Drones, UAVs, eVTOL & More
Outrunner brushless motor stator laminations power a wide range of UAV and drone applications :
| Application | Power Range | Stator Requirements | Performance Priorities |
|---|---|---|---|
| FPV Racing Drones | 500W–3kW | 9N12P/12N14P, 0.15–0.20mm | High RPM, rapid acceleration, responsiveness |
| Logistics & Delivery Drones | 3–15kW | 24N22P, 0.20mm, high efficiency | Long flight time, payload capacity, reliability |
| Agriculture Spraying UAVs | 3–15kW | 24N22P, corrosion-resistant coating | Heavy payload, dust/chemical resistance, durability |
| eVTOL / Air Taxis | 15–50+ kW | 36N30P, 48N40P, 0.20mm | Safety, redundancy, high continuous power |
| Heavy-Lift Cargo Drones | 5–20kW | 24N22P, 36N30P | Maximum thrust, reliability, sustained power |
"Outrunner brushless motors with precision stator laminations deliver exceptional torque density—enabling direct-drive propulsion without the complexity and losses of gearboxes."
6-Step Engineering Selection Guide for Outrunner Stator Laminations
For motor designers and procurement engineers, selecting the optimal outrunner stator lamination requires systematic evaluation. Here is a practical 6-step framework :
- Define Power & Torque Requirements – Identify your motor's performance targets:
- Continuous power: 500W, 5kW, 15kW, 50+ kW?
- Peak torque: How much overload capacity is needed?
- Operating RPM range: Low-speed high-torque or high-speed?
- Select Stator Outer Diameter – Match motor size to power class:
- 12–22mm: Micro outrunners (<500W)
- 22–30mm: FPV/racing (500W–3kW)
- 30–60mm: Mid-power UAV (3–15kW)
- 60–200mm: High-power/eVTOL (15–50+ kW)
- Choose Slot/Pole Configuration – Critical for torque and efficiency:
- 9N12P: Most common for FPV—excellent torque and smoothness
- 12N14P: Near-perfect winding factor (0.933)—most popular for UAV
- 24N22P: High torque, low cogging, heavy-lift applications
- 36N30P: Maximum torque density for eVTOL
- 48N40P: Ultra-smooth, extreme power applications
- Specify Lamination Thickness – Thinner laminations reduce core loss at high frequencies:
- 0.15mm: Ultimate high-RPM performance, racing outrunners
- 0.20mm: Optimal balance—most outrunner applications
- 0.35mm: Not recommended for high-performance outrunner motors
ⓘ "0.20mm laminations reduce core loss by approximately 30% compared to 0.35mm—enabling 15–25% higher torque density."
- Verify Thermal & Structural Requirements – Outrunner motors demand:
- High stacking factor (≥ 97%) for maximum magnetic material
- Epoxy coating (30–60µm, Class H 180°C) for thermal durability
- Strong interlock or welding for structural integrity
- Precision concentricity (≤ ±0.01mm) for consistent air gap
- Choose a Leading Outrunner Stator Supplier – Evaluate expertise:
- Experience with outrunner motor stator designs (9N12P, 12N14P, 24N22P, etc.)
- Ultra-thin lamination capability (0.15–0.20mm)
- Large diameter capability (up to 200mm)
- Precision stamping: burr < 0.03mm, concentricity ±0.01mm
- Epoxy coating for outrunner thermal environments
- Material certificates and third-party test reports
- Proven track record with outrunner motor manufacturers
- Global supply chain with reliable shipping to Kazakhstan and worldwide
- Engineering support for outrunner motor optimization
FAQ: Outrunner Brushless Motor Technical Questions
An outrunner brushless motor is a brushless DC motor configuration where the permanent magnet rotor spins on the outside of the stator electromagnets. This external-rotor design allows the motor to contain more magnetic poles of greater strength than would be possible if the magnets had to be arranged on a smaller diameter inner space . Outrunner motors are preferred for drone applications because: (1) high torque density allows direct propeller drive without gearboxes—reducing weight and complexity, (2) large rotor diameter provides mechanical advantage for low-speed high-torque operation, (3) multi-pole designs deliver smooth torque with minimal cogging, and (4) elimination of gearbox losses improves overall efficiency.
For outrunner brushless motors, the optimal stator lamination features: 0.20mm (or 0.15mm for racing) silicon steel, slot/pole configurations such as 9N12P, 12N14P, or 24N22P, burr height < 0.03mm, epoxy coating (30–60µm, Class H 180°C), and stacking factor ≥ 97%. The 12N14P configuration delivers a near-perfect winding factor of 0.933 and low cogging torque . Reenives specializes in these outrunner motor stator laminations.
Lamination thickness directly impacts core loss in outrunner motors. 0.20mm laminations achieve core loss ≤ 8.5 W/kg at 400Hz—approximately 30% lower than 0.35mm material. For outrunner motors, this reduction in core loss translates to: (1) higher torque density (15–25% improvement), (2) cooler operation, (3) higher efficiency (90–95%), and (4) reduced cooling requirements. 0.15mm laminations provide ultimate performance for racing and extreme applications .
For outrunner drone motors, the optimal slot/pole configuration depends on the application: (1) 9N12P is most common for FPV and racing outrunners—excellent torque and smoothness, (2) 12N14P offers near-perfect winding factor (0.933) and is most popular for UAV applications, (3) 24N22P provides high torque with low cogging for heavy-lift and logistics drones, (4) 36N30P delivers maximum torque density for eVTOL applications. Reenives supports all these configurations with custom tooling.
Epoxy powder coating provides three critical functions for outrunner motor stator laminations: (1) electrical insulation between laminations to minimize eddy currents and prevent interlaminar shorts—critical for high-current operation, (2) thermal durability up to 180°C (Class H) to withstand the heat generated during sustained high-torque operation, and (3) corrosion resistance for outdoor UAV and marine applications . The coating thickness (30–60µm) is optimized with dielectric strength exceeding 2.5 kV .
Burr height is the raised edge left on stamped metal after the punching process. In outrunner stator laminations, burr height must be maintained below 0.03mm because excessive burrs can: (1) damage enamel insulation on copper windings during assembly—causing short circuits, (2) create localized magnetic saturation points that reduce torque output, (3) increase core loss through eddy current concentration, and (4) reduce motor reliability—critical for UAV applications where motor failure means crashing. Reenives maintains burr height < 0.03mm through precision progressive stamping dies .
Yes. Reenives supports full customization of outrunner stator laminations including: stator outer diameter (12–200mm), lamination thickness (0.15–0.20mm), slot/pole configurations (9N12P, 12N14P, 24N22P, 36N30P, 48N40P, custom), stacking height, material grade, and epoxy coating specifications. Private mould development is available for high-volume OEM projects with exclusive design rights—from micro racing outrunners to large eVTOL propulsion systems.
Why Reenives – Leading Outrunner Brushless Motor Stator Lamination Supplier in Kazakhstan
Reenives has earned its reputation as a leading outrunner brushless motor stator lamination supplier in Kazakhstan and globally by combining advanced manufacturing technology with deep expertise in outrunner motor design and a reliable global supply chain.
Our Advantages — Outrunner Stator Specialists
- ✅ Ultra-Thin Silicon Steel: 0.15–0.20mm laminations reduce core loss by up to 30%—enabling 15–25% higher torque density
- ✅ Large Diameter Capability: Stator OD up to 200mm for high-power outrunner motors
- ✅ Multi-Pole Expertise: 9N12P, 12N14P, 24N22P, 36N30P, 48N40P, and custom configurations
- ✅ Precision Stamping: Burr height < 0.03mm, concentricity ±0.01mm, stacking factor ≥ 97%
- ✅ Epoxy Coating: 30–60µm, Class H 180°C, dielectric > 2.5 kV
- ✅ Full Customization: Private mould development for exclusive outrunner designs
- ✅ Trusted Quality Control: IEC 60404-2 testing, third-party verification, material certificates
- ✅ Global Export: Complete export qualifications with reliable shipping to Kazakhstan and worldwide
- ✅ Proven Track Record: 4 years experience, 1,000+ enterprise clients, 100+ R&D patents
🌏 Our leadership promise: Stator laminations that maximize torque density and thermal limits. Consistent quality that eliminates rework. Engineering support that optimizes your outrunner motor design. Reliable global supply chain that delivers to Kazakhstan and worldwide. That's why Reenives is the leading outrunner brushless motor stator lamination supplier in Kazakhstan.
⚡ Ready to maximize your outrunner motor's torque density with precision stator laminations?
Contact Reenives today for engineering consultation, OEM samples, and competitive global pricing with reliable shipping to Kazakhstan.
📱 WhatsApp: +86-13377741885
Dongguan Runlu Motor Technology Co., Ltd.
Reenives — Professional Drone Stator Core Manufacturer
Founded in 2022, Reenives has rapidly grown into a trusted outrunner stator lamination supplier for the global UAV, eVTOL, and industrial motor markets—serving clients in Kazakhstan and worldwide .
Independent R&D Technology · Imported stamping & epoxy powder coating production lines · Dust-free workshops · 4 years of manufacturing experience · Solved outrunner stator challenges for 1,000+ enterprises worldwide—including leading drone and UAV manufacturers.
From production to sales, we support bulk purchasing, private mould development, and sample making. We provide tailor-made solutions for your specific outrunner motor production scenarios—with competitive global pricing, consistent quality, and reliable on-time delivery to Kazakhstan and beyond .
🌐 www.reenives-bldcmotor.com | 📧 linda_reenives@163.com | 📱 +86-13377741885
✈️ Global outrunner motor manufacturers welcome — consult, visit the factory, or request free samples today!
Reenives — Leading Outrunner Brushless Motor Stator Lamination Supplier in Kazakhstan
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