3115 Drone Motor Stator Core — What Is a 3115 Drone Motor Stator Core? | Reenives Drone Motor Stator Supplier

What Is a 3115 Drone Motor Stator Core?

A 3115 drone motor stator core is the stationary electromagnetic core of a brushless outrunner motor sized "3115." In the drone motor naming convention, the four-digit code describes the stator dimensions:

• First two digits "31" = stator outer diameter ≈ 31 mm
• Last two digits "15" = stator stack height ≈ 15 mm

So a 3115 stator core is a laminated silicon steel ring with an outer diameter of approximately 31 mm and a stack height of approximately 15 mm. It is built by stacking thin electrical steel laminations — typically 0.2 mm thick — and securing them by interlocking, bonding, or welding. Each lamination is coated with a thin insulation layer to limit eddy currents.

The 3115 stator is the heart of motors used in heavy-lift FPV drones, 10-inch cinelifters, long-range cruisers, and industrial UAV platforms. It sits inside the motor, holds the copper windings, and generates the rotating magnetic field that drives the outer bell rotor.

Put simply: the 3115 stator core is the "power-producing frame" of the motor. Its 31 mm diameter and 15 mm stack height determine how much torque the motor can produce, how much copper it can hold, and how well it dissipates heat.

3115 drone motor stator core — 31 mm OD, 15 mm stack, 0.2 mm laminations, 12N14P. Manufactured by Reenives.

Types of 3115 Stator Cores

3115 stator cores come in several configurations, each suited to different motor designs and performance requirements. Reenives manufactures the following types:

• 12N14P 3115 Stators — The industry-standard slot/pole combination for 3115 motors. 12 slots, 14 poles. Delivers smooth torque delivery with low cogging — critical for cinelifter and gimbal-assisted flight.
• 0.2 mm Lamination 3115 Stators — Ultra-thin laminations for reduced eddy current losses. The industry standard for 3115 motors — used by Lumenier, BrotherHobby, EMAX, Hobbywing, and T-Motor.
• Interlocked 3115 Stators — Laminations with integral dimples or dovetails that lock together under pressure. Cost-effective for high volume.
• Bonded 3115 Stators — Laminations bonded with adhesive instead of interlocking, reducing eddy current losses and vibration.
• Epoxy-Coated 3115 Stators — Powder-coated for enhanced insulation, corrosion resistance, and wire adhesion. H-class 180°C coating with electrostatic technology is standard.
• Segmented 3115 Stators — Individual teeth wound separately and assembled, achieving higher slot fill factors.
• Custom 3115 Stators — Private mould development for unique stack heights (e.g., 3110, 3113), winding schemes, and mounting interfaces.

Whether you need a standard 3115 stator for a 10-inch cinelifter or a custom stack height for a specialized long-range build, Reenives can deliver.

Key Specifications & Data

Below are typical specifications for Reenives 3115 drone motor stator cores. Custom values are available upon request.

Data source: Reenives internal testing, industry motor specifications (Lumenier ZIP V2 3115, BrotherHobby T5 Pro 3115, EMAX E3 3115, Hobbywing XRotor 3115), and supplier material datasheets, 2024–2025. Actual values may vary by design.

Applications & Why 3115 Matters

The 3115 stator core is specifically engineered for applications where 2812 stators are not enough. Here is where the 3115 makes a measurable difference:

• 10-Inch Cinelifters — The 3115's larger iron package (31×15mm vs. 28×12mm for 2812) sustains high current at low RPM without the thermal spike that kills smaller motors on long cinematic takes. On the bench, the 3115 runs noticeably cooler than the 2812 under sustained 80% throttle with 10-inch props.
• Long-Range FPV Cruisers — Higher torque at lower KV means efficient cruise flight with minimal throttle. The 3115's 0.2mm laminations reduce core loss, directly translating to longer flight time.
• Heavy-Lift Multi-Rotors — The 3115 delivers up to 5.2 kg of thrust per motor on 6S with a 10-inch prop, making it suitable for professional cine-lift and industrial payload platforms.
• X8 Coaxial Builds — The 3115's torque characteristics make it a popular choice for coaxial X8 configurations, where two motors share the same arm and must work together smoothly.
• Industrial UAV Platforms — NDAA-compliant and commercially available 3115 motors are increasingly used in enterprise and defense UAVs, where reliability and thermal performance are critical.

Reenives 3115 stator cores are used across a wide range of drone and brushless motor applications:

• 10-Inch Cinelifter FPV Drones — Heavy-lift cinema platforms with large props.
• Long-Range FPV Cruisers — Efficient endurance platforms.
• Industrial Inspection UAVs — High-torque motors for stable hover and sensor payloads.
• Agricultural Spraying Drones — Corrosion-resistant epoxy-coated stators for harsh environments.
• eVTOL & UAV Propulsion — Custom high-power stators for next-generation air mobility.
• General BLDC Motors — Fans, pumps, robotics, and industrial actuators.

Reenives 3115 stator cores power 10-inch cinelifters, long-range FPV cruisers, and industrial UAVs worldwide.

How to Select the Right 3115 Stator Core

Choosing the correct 3115 stator core for your motor involves several engineering decisions. Follow these steps:

1. Confirm Stator Dimensions — Verify the required outer diameter (31 mm) and stack height (15 mm standard). Custom stack heights such as 13 mm (3113) or 18 mm are available for specialized builds.
2. Select Slot/Pole Combination — 12N14P is the industry standard for 3115 motors. It delivers smooth torque with low cogging — critical for cinelifter and gimbal-assisted flight.
3. Choose Lamination Thickness — 0.2 mm is the standard for 3115 motors. Thinner laminations reduce eddy current loss, which directly improves thermal performance on long cinematic takes.
4. Select Lamination Material — Kawasaki Steel and 20JNEH1200 are the industry benchmarks for 3115 stator cores. These high-performance silicon steel grades minimize core loss.
5. Decide on Insulation Coating — Epoxy powder coating with H-class 180°C rating and electrostatic application is standard. This improves corrosion resistance, wire adhesion, and moisture protection.
6. Consider Assembly Method — Interlocked laminations are economical; bonded laminations reduce vibration and eddy current loss.
7. Verify Tolerances & Burr Height — Tight tolerances (±0.05 mm) and minimal burrs (≤ 0.03 mm) ensure proper stacking and reduce vibration.
8. Request Samples & Test — Reenives provides free samples for qualified projects. Test core loss, temperature rise, and mechanical fit before committing to production.

FAQ — 3115 Drone Motor Stator Core Parameters

Summary — The 3115 Stator Core Is the Power-Producing Frame of Heavy-Lift Drone Motors