2012
Established (14+ Yrs Focus)
7,000 m²
Self-Owned Foshan Facility
300+ Sets/Yr
In-House Mold Capacity
±0.02 mm
Precision Molding Tolerance
≤ 50 PPM
Strict Defect Rate Control
UL & ISO
ISO9001, ISO14001 & UL Certified
FIND YOUR COMPONENT
Which Component Family Are You Sourcing?
Explore the component family that matches your assembly—from motor and transformer winding bobbins to protective covers, stator overmolding, and metal-to-plastic structural parts.
01. Motor & Transformer Bobbins
High-dielectric winding support and slot insulation for Stepper, Servo, BLDC motors, and high-frequency transformers. Molded in UL94 V-0 PPS, LCP & PA66 with CTI ≥ 600V and 200°C+ heat resistance.
Explore Motor & Transformer Bobbins →
02. End Caps, Encoder & Cable Covers
Precision-molded motor end caps, dustproof optical/magnetic encoder back covers, and burr-free cable clamp covers. Engineered for high bearing bore concentricity, tight snap-fit locking, and low running noise.
Explore End Caps & Covers →
03. Stator & Metal Insert Overmolding
High-adhesion polymer encapsulation directly onto silicon-steel stator cores, stainless lead screws, splined brass bushings, and hollow shafts with in-mold internal threads. Eliminates delamination and manual assembly.
Explore Stator & Insert Overmolding →
04. Flanges, Bushings & Insulation Parts
Metal-to-plastic mounting flanges with knurled brass inserts, self-lubricating limit shaft bushings, phenolic (Bakelite) spacers, strain-relief wire grommets, waterproof gaskets, and die-cut insulating films.
Explore Flanges, Bushings & Insulation →APPLICATION SCENARIOS
Industries We Serve: Find Parts by Your Application
Select your industry below to jump directly to the insulation, overmolding, and structural components engineered for your operating conditions.
01. Industrial Automation & Robotics
Engineered for high-frequency start-stop cycles, strict bearing/shaft concentricity, signal stability, and continuous high-load operation.
KEY MATCHED COMPONENTS:
02. Smart Home, Security & Office
Focused on ultra-quiet noise damping, compact micro-stepping accuracy, self-lubricating wear resistance, and high-volume dimensional consistency.
KEY MATCHED COMPONENTS:
03. HVAC, Pumps & Power Tools
Built to handle high-speed rotational dynamic balance, rapid airflow heat dissipation, vibration shock, and moisture/oil sealing.
KEY MATCHED COMPONENTS:
04. Power Supplies, EV & Instruments
Designed for 0.35mm thin-wall dielectric creepage, 200°C+ solder/operating heat, CTI ≥ 600V tracking resistance, and lightweight metal replacement.
KEY MATCHED COMPONENTS:
FROM DRAWING TO FINISHED PART
In-House Micron Tooling & Molding for the Part You Need
Our in-house mold development center (300+ mold sets/year) reviews your 2D/3D drawing and builds precision tooling using Swiss Charmilles Slow-Speed Wire EDM and Japanese Sodick Mirror EDM. Mirror-finish cavities require zero manual polishing—guaranteeing 100% burr-free edges on winding channels and snap-fits.
Paired with 50+ automated injection molding machines and DuPont/BASF modified engineering plastics, we hold repeatable ±0.02mm tolerances across an annual output of 220 million pieces.
Explore Tooling & Capabilities →ENGINEERING & MATERIAL BARRIERS
Solving Your Toughest Motor Insulation & Structural Challenges
We go beyond standard custom molding—combining polymer modification, insert pre-heating, and in-mold thread forming to solve critical failure modes.
01 / MATERIAL MODIFICATION
Thin-Wall & 200°C+ Dielectric Stability
Industry Pain Point: Thin-walled bobbins (0.35mm–0.5mm) often suffer from short shots, warping, wire-slot cracking, or dielectric breakdown under high-heat motor operation.
RUNHENG Solution: Partnering with DuPont & BASF, we modify PA66, PPS, LCP, and PA46 for high flowability, low moisture absorption, UL94 V-0 flame retardancy, CTI ≥ 600V, and 200°C+ continuous heat resistance.
02 / METAL-PLASTIC BONDING
Delamination-Free Insert Overmolding
Industry Pain Point: Mismatched thermal expansion between metal cores (stators/lead screws/brass bushings) and plastic causes delamination, cracking, or eccentric rotation noise.
RUNHENG Solution: Controlled insert pre-heating + high-adhesion modified polymers create tight molecular infiltration. 100% inspected for rotor bore coaxiality, thread runout, and pull-out torque.
03 / COST & WEIGHT REDUCTION
In-Mold Threads & Structural Replacement
Industry Pain Point: Traditional CNC-machined aluminum flanges and internal-threaded metal shafts drive up unit costs, add excessive weight, and require secondary assembly.
RUNHENG Solution: Direct in-mold forming of hollow-shaft internal threads, splines, and reinforced plastic flanges—requiring ZERO secondary machining while cutting unit costs by 30%–50%.
QUALITY THROUGHOUT THE PROCESS
Check the Critical Features That Matter to Your Assembly
Quality control follows your agreed drawing and CTQ (Critical-to-Quality) specs—with 100% inspection on bearing bore concentricity, slot width, flange flatness, and internal thread gauges. Supported by dielectric withstand voltage testing, UL94 V-0 flame checks, and RoHS/REACH compliance, we maintain a defect rate of ≤ 50 PPM.
Your Sample Approval Comes Before Mass Production
01. 24h DFM & Quote ➔ 02. In-House Tooling ➔ 03. T1 Sample & Full QC Report ➔ 04. Mass Production
Explore Quality & Process →
ENGINEERING JOURNAL
Engineering Guides Behind Better Component Decisions
Explore practical technical comparisons on PPS vs. PA66+GF material selection, stator overmolding sealing design, thin-wall transformer bobbin creepage, and metal-to-plastic cost reduction.
Explore the Engineering Journal →
ABOUT RUNHENG
14+ Years of Manufacturing Experience Behind Your Custom Part
Founded in 2012 in Foshan, Guangdong, RUNHENG operates a 7,000 m² integrated R&D, tooling, molding, and QC facility. Backed by ISO 9001, ISO 14001, UL certification, and 50+ patents, we serve motor and automation OEMs worldwide.
Learn More About RUNHENG →START YOUR PROJECT REVIEW
Have a 2D/3D Drawing or Sample to Review?
Share your component drawing (STEP, IGES, DWG, PDF), target application, operating temperature, and estimated annual volume. Even if some details are still being defined, our engineering team will respond within 24 hours with DFM feedback and tooling/unit pricing.
✓ Free DFM Mold-Flow & Material Evaluation (PPS / PA66 / LCP / PA46)
✓ Standard Bobbin & Cover Samples Available from Stock
🔒 100% Confidential — NDA Available Before File Review
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.
