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 › Overmolded Lead Screws
Precision Overmolded Lead Screws & Self-Lubricating Drive Nuts
Wear-resistant, self-lubricating engineering plastics (modified POM, PTFE-blends, PPS, and PA66) molded directly onto stainless steel lead screws, motor rotor shafts, or brass guide cores. Engineered for zero axial backlash, ultra-quiet linear actuation, and high pull-out torque in medical devices, smart home actuators, and optical equipment.
✓ Coaxiality & Runout ≤ 0.02mm
✓ Zero AxialLoosening or Slippage
✓ Self-Lubricating Quiet Operation
PRECISION TOLERANCE
≤0.02mm Coaxiality
CORE POLYMERS
POM, PA66, PPS, PEEK, PBT
SAFETY & COMPLIANCE
ISO 9001 / ISO 14001 · UL · RoHS/REACH
TOOLING & LEAD TIME
15–25 Days T1 · 7–10 Days Insert Swap
WHY MOTION ENGINEERS CHOOSE RUNHENG OVERMOLDED SCREWS
High Torsional Retention, Micron Coaxiality & Smooth Linear Travel
01. High Pull-Out & Torsional Locking
Polymer melt penetrates deeply into knurled, grooved, or cross-holed stainless steel shaft retention zones—guaranteeing zero axial slippage or rotational loosening under cyclic thrust loads.
02. ≤ 0.02mm Shaft-to-Plastic Coaxiality
Precision V-block and collet mold fixtures hold long metal lead screws concentrically during vertical injection, preventing shaft bending or eccentric wobble.
03. Self-Lubricating Anti-Backlash Resins
PTFE/silicone-modified POM (Acetal) and PPS formulations deliver low friction coefficients, silent operation, and long wear life without external grease contamination.
04. Zero Flash on Precision Screw Threads
Sodick Mirror EDM thread-sealing shutoffs prevent plastic flash from leaking onto functional stainless steel lead-screw threads.
TECHNICAL SPECIFICATIONS
Overmolded Lead Screw Engineering Parameters
Available Base Resins
Self-Lubricating POM, PTFE/Silicone-Modified PA66, PPS, PEEK, PBT (DuPont / BASF Partners)
Supported Metal Inserts
SUS303 / SUS304 / SUS316 Stainless Steel Lead Screws, Carbon Steel Shafts, Brass Cores
Coaxiality & Runout Tolerance
≤ 0.02mm (100% Verified on V-Block Concentricity & Runout Gauges)
Bonding & Torque Retention
Custom Knurl/Groove Infiltration; 100% Batch Destructive Torque & Pull-Out Sampled
Thermal & Wear Rating
-40°C to 200°C+ (Depending on POM vs. PPS/PEEK selection)
Mold Machining Standard
Swiss Charmilles Slow-Speed Wire EDM & Precision Rotary Unscrewing Tooling
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 Overmolded Shaft & Screw Configurations
Stepper Motor Linear Actuator Lead Screws
Stainless steel T-thread or metric lead screws overmolded with rotor couplings, travel stops, or magnet holders.
Inquire Lead Screws → Self-Lubricating Overmolded Drive Nuts
Precision internal-threaded plastic nuts molded directly onto metal mounting flanges or guide sleeves.
Request Custom Quote → Overmolded Rotor Shafts & Worm Gears
Motor shafts overmolded with helical gears, cams, or insulating sleeves for automotive and appliance actuators.
Discuss Shaft Molding →HOW WE GUARANTEE CONSISTENCY
How We Control Shaft Runout & Torsional Strength
01. Ultrasonic Degreasing & Insert Pre-Heating
Metal screws are ultrasonically cleaned to remove machining oils and pre-heated to maximize polymer grip.
02. Balanced Collet Clamping Injection
Custom mold collets support the metal shaft along its axis so high injection pressure never deflects thin screws.
03. 100% Runout, Pitch & Torque QC
Verified on optical comparators, dial-indicator runout fixtures, and axial push-out force testers.
03 / INSERT MOLDING & STATOR OVERMOLDING FAMILY
Explore Other Metal-Insert Overmolded Components
FAMILY 03 · SIBLING COMPONENT
3.3 Splined Brass Bushings & Linear Limiters
High-strength metal-plastic composite components combining splined brass or steel bushings with lightweight, vibration-damping engineering plastics.
Explore Bushings & Limiters →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 Lead Screws or Custom Shaft Encapsulation?
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.
