FAMILY 03 · SIBLING COMPONENT
3.1 Integrated Stator Overmolding
Direct high-adhesion polymer encapsulation molded onto customer-supplied or in-house sourced laminated silicon-steel stator cores.
Explore Stator Overmolding →Home › Products › 03 Insert & Stator Overmolding › Splined Bushings & Linear Limiters
Overmolded Splined Brass Bushings & Linear Motor Limit Components
High-strength metal-plastic composite components combining the high-torque shear resistance of internal/external splined brass or steel bushings with the lightweight, vibration-damping, and electrically insulating properties of modified PA66+GF, PPS, and POM. Built for linear stepper motors, valve actuators, and automated position limiters.
✓ High-Torque Anti-Rotation Knurl Lock
✓ Zero-Flash Internal Metal Splines
✓ Cyclic Impact & Wear Endurance
PRECISION TOLERANCE
±0.02mm Concentricity
CORE POLYMERS
PA66+GF, PPS, POM, PA46, PEEK
SAFETY & COMPLIANCE
UL94 V-0 Available · RoHS/REACH
TOOLING & LEAD TIME
15–25 Days T1 · 7–10 Days Insert Swap
WHY ENGINEERS CHOOSE RUNHENG COMPOSITE BUSHINGS & LIMITERS
Metal-Grade Torque Transmission with Plastic-Grade Noise Damping
01. Anti-Rotation Diamond & Straight Knurl Lock
Outer metal insert surfaces are engineered with deep diamond knurls and undercut grooves, allowing high-strength PA66+GF or PPS to lock the brass bushing against extreme rotational torque and axial pull-out.
02. 100% Flash-Free Internal Splines & Threads
Precision mold core pins seal tightly against both ends of the brass insert—ensuring internal splines, keyways, and threads remain 100% clean and ready for assembly without secondary deburring.
03. Linear Motor Hard-Stop Impact Resistance
Toughened polymer outer profiles act as resilient mechanical travel limiters and anti-rotation guides inside linear stepper actuators, absorbing repeated end-of-stroke impacts without cracking.
04. Coaxial Multi-Cavity Repeatability
Machined via Swiss Charmilles Wire EDM, our insert-locating pins hold ±0.02mm concentricity between the inner metal spline and the outer plastic guide geometry.
TECHNICAL SPECIFICATIONS
Splined Bushing & Linear Limiter Parameters
Available Overmolding Resins
Toughened PA66+GF, Modified PPS, POM, PA46, PEEK (DuPont / BASF Partners)
Supported Metal Inserts
C3604 / H59 Brass, Phosphor Bronze, Sintered Bronze, Stainless Steel (Splined / Threaded / Hex)
Concentricity & Position Tolerance
±0.02mm Between Inner Metal Bore and Outer Plastic Guide Features
Internal Bore Protection
100% Flash-Free Splines & Threads (Zero plastic seepage inside metal bore)
Mechanical Retention
High Torsional Breakaway Torque & Axial Push-Out Force (Custom tested per drawing)
Thermal & Flame Rating
UL94 V-0 Available; -40°C to 220°C+ Operating Range
Quality & Defect Control
≤ 50 PPM Defect Rate; 100% Spline Go/No-Go Plug Gauge & Torque Sampling
Certifications
ISO 9001:2015, ISO 14001:2015, UL Process Certified, RoHS & REACH
STANDARD & CUSTOM CONFIGURATIONS
Supported Composite Bushing & Limiter Types
Overmolded Splined & Hex Brass Bushings
Plastic drive sleeves and gears molded over internal-splined or hexagonal brass hubs for high-torque shaft coupling.
Inquire Splined Bushings → Linear Stepper Motor Travel Limiters
Precision anti-rotation sliders and mechanical stop nuts overmolded on threaded brass cores for linear actuators.
Request Custom Quote → Multi-Insert Structural Actuator Blocks
Complex molded housings integrating multiple threaded brass nuts, locating pins, and bearing sleeves in one shot.
Discuss Insert Molding →HOW WE GUARANTEE CONSISTENCY
How We Prevent Insert Flash & Guarantee Torque Strength
01. Incoming Metal Insert Gauge Verification
Every batch of brass bushings is checked for length and bore tolerance before entering the vertical injection cell.
02. Spring-Loaded Core Pin Shutoff Molding
Compensating mold core pins seal both insert faces while high-pressure polymer fills the outer knurl undercuts.
03. 100% Spline Plug-Gauge & Destructive Torque QC
Outgoing inspection verifies zero internal flash via spline plug gauges alongside scheduled destructive torque-to-failure audits.
03 / INSERT MOLDING & STATOR OVERMOLDING FAMILY
Explore Other Metal-Insert Overmolded Components
FAMILY 03 · SIBLING COMPONENT
3.2 Overmolded Lead Screws & Shafts
Wear-resistant, self-lubricating engineering plastics molded directly onto stainless steel lead screws, motor rotor shafts, or brass guide cores.
Explore Overmolded Lead Screws →FAMILY 03 · SIBLING COMPONENT
3.4 Hollow Shafts with Molded Internal Threads
Precision internal threads and splines formed directly inside the injection mold for hollow-core motor shafts.
Explore Hollow Threaded Shafts →DIRECT ENGINEERING SUPPORT
Need Overmolded Splined Bushings or Linear Motor Limiters?
Upload or email your 2D/3D component drawing (STEP, IGES, DWG, PDF) or share your component geometry. 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.
