FAMILY 01 · SIBLING COMPONENT
1.1 Stepper Motor Bobbins
Precision one-piece injection-molded stator bobbins engineered for hybrid, permanent magnet (PM), and linear stepper motors.
Explore Stepper Bobbins →Home › Products › 01 Bobbins & Insulators › Brushless (BLDC) Motor Bobbins
Brushless (BLDC) Motor Stator Bobbins with Heat Dissipation Channels
High-toughness, dynamic-balanced stator insulators engineered for inner-rotor and outer-rotor BLDC motors in HVAC fans, water pumps, power tools, automotive actuators, and drones. Designed with integrated airflow ribs to lower winding temperature rise and extend motor lifespan.
✓ Integrated Airflow Cooling Ribs
✓ High-Speed Dynamic Balance
✓ Vibration & Drop-Shock Resistant
PRECISION TOLERANCE
±0.02mm Concentricity
CORE POLYMERS
PA66+GF, PPS, PBT+GF, PA46
SAFETY & COMPLIANCE
UL94 V-0 · CTI ≥ 600V Available · RoHS/REACH
TOOLING & LEAD TIME
15–25 Days T1 · 7–10 Days Insert Swap
WHY ENGINEERS CHOOSE RUNHENG BLDC BOBBINS
Engineered for Thermal Dissipation, Dynamic Balance & Vibration Endurance
01. Built-In Airflow Cooling Channels
Specially molded flow-guiding ribs and ventilation slots accelerate internal heat exchange, reducing copper winding temperature rise under high-RPM continuous operation.
02. Rotational Dynamic Balance Consistency
Uniform multi-gate melt flow and ±0.02mm concentricity ensure symmetric mass distribution—critical for ultra-quiet, low-vibration high-speed BLDC motors.
03. High Impact & Vibration Toughness
Toughened PA66+GF and PPS formulations prevent slot-lip cracking during high-G power tool impacts, automotive vibrations, or rapid thermal shocks.
04. Mainstream Stock & Rapid Custom Molds
Standard inner/outer rotor BLDC slot configurations in stock; 300+ annual mold capacity supports rapid custom slot geometries and Hall-sensor mounting features.
TECHNICAL SPECIFICATIONS
BLDC Motor Bobbin Engineering Parameters
Available Base Resins
Toughened PA66, PA66+GF, PPS, PBT+GF, PA46 (DuPont / BASF Partners)
Flame Retardancy Grade
UL94 V-0 Certified
Electrical Insulation
CTI ≥ 600V Available; 100% Sampling Dielectric Withstand Voltage Tested
Thermal Resistance
150°C to 220°C+ Continuous Operation
Minimum Wall & Tolerance
Wall Thickness Down to 0.12mm; Concentricity & Slot Tolerance ±0.02mm
Supported Stator Types
Inner-Rotor & Outer-Rotor Multi-Slot BLDC Laminations (6 / 9 / 12 / 18 / 24 Slots & Custom)
Quality & Defect Control
≤ 50 PPM Defect Rate; ISO 9001:2015, ISO 14001:2015, UL Process Certified
Environmental Compliance
Full RoHS & REACH Certified
STANDARD & CUSTOM CONFIGURATIONS
Supported BLDC Stator Insulator Geometries
Outer-Rotor BLDC Spoke Insulators
Multi-slot circular bobbins with central bearing boss and airflow vanes for ceiling fans, drones, and gimbal motors.
Inquire Outer-Rotor Bobbins → Inner-Rotor High-Speed BLDC Bobbins
High-rigidity end insulators with integrated Hall-effect PCB locating pins and IDC terminal pockets for power tools and pumps.
Request Custom Quote → Waterproof Overmolded BLDC Stators
Full polymer encapsulation over BLDC stator cores for submersible water pumps and outdoor HVAC fans.
Discuss Overmolding →HOW WE GUARANTEE CONSISTENCY
How We Guarantee High-RPM BLDC Reliability
01. Anti-Vibration Toughened Compounding
Elastomer-toughened glass-fiber PA66/PPS blends prevent brittle fracture under high-frequency electromagnetic vibration.
02. Charmilles EDM Concentric Tooling
Precision wire-cut core inserts guarantee uniform slot wall thickness and zero parting-line burrs across all stator teeth.
03. Concentricity & Thermal Shock QC
100% sampling on outer/inner diameter runout, stator stack clamping fit, and high-pot insulation resistance.
01 / MOTOR BOBBINS & STATOR INSULATORS FAMILY
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1.2 Servo Motor Bobbins
High-dielectric segmented and integral coil formers rated for CTI ≥ 600V and 200°C+ continuous operation in industrial servo motors.
Explore Servo Bobbins →FAMILY 01 · SIBLING COMPONENT
1.4 Transformer Coil Bobbins
0.12mm ultra-thin-wall LCP, PPS, and Phenolic bobbins with pre-embedded terminal pins and 260°C solder-heat resistance.
Explore Transformer Bobbins →DIRECT ENGINEERING SUPPORT
Sourcing Standard or Custom BLDC Motor Bobbins?
Upload or email your 2D/3D stator drawing (STEP, IGES, DWG, PDF) or share your motor frame size. Free standard stock samples are available (freight collect), and custom DFM reviews are returned within 24 business hours.
✓ Free Standard Stock Samples (Freight Collect)
✓ 24-Hour Engineering DFM & Quote Response
✓ 100% NDA Confidentiality Protection
Send Your 2D/3D Drawing or Sample Request
Fill out the project specs below or attach your CAD files. Our engineering team responds within 24 business hours.
