Helical Gear with Internal Thread Nut

Specifications

• Product Category: Precision Linear & Transmission Components
• Helical Gear Module Range: M0.8 to M1.5
• Internal Thread Profiles: Trapezoidal (Tr / ACME), standard metric, or multi-start high-lead threads
• Tooling De-Threading Mechanism: In-mold automatic rotating unscrewing/ejection system
• Standard Materials: Wear-resistant POM (Polyoxymethylene / Acetal), Engineering Nylon (PA66 / PA46 / Glass-filled PA)
• Primary Function: Converts rotational input from helical gears/worms into smooth, high-precision linear lead screw motion
• Applications: Medical Linear Actuators, Smart Height-Adjustable Desks/Chairs, Automotive Power Seat Tracks, Smart Window Openers, Precision Positioning Stages

Manufacturing Processes & Capabilities

• In-Mold Automatic Unscrewing Tooling: Features an automated rotary core-unscrewing mold mechanism that precisely extracts threaded cores along the pitch angle, eliminating parting line seams and burrs to achieve mirror-smooth internal tooth flanks and tight roundness.
• Strict Thread-to-Gear Concentricity Control: Simultaneously molds the M0.8–M1.5 external helical gear and internal nut threads in a single shot; tightly controls concentricity and perpendicularity between the pitch diameter and thread axis to prevent shaft wobbling and binding.

Features & Advantages

• Integrated Rotary-to-Linear Direct Drive: Combines external helical torque input with internal linear nut drive in a one-piece component, eliminating secondary nut adapters and couplings to maximize system rigidity and packaging compactness.
• Smooth Engagement & Low Running Friction: Micro-finished thread surfaces paired with self-lubricating polymers ensure seamless, low-clearance engagement with mating lead screws, eliminating stick-slip friction and operational resistance.
• Whisper-Quiet Transmission & High Contact Ratio: Progressive helical gear engagement delivers high torque transmission while suppressing gear meshing whine, fulfilling strict acoustic demands for medical and smart home environments.
• High Wear Endurance & Axial Load Reliability: Molded from premium wear-resistant resins that resist axial creep and mechanical fatigue under continuous cyclic push-pull loads, ensuring long-term maintenance-free reliability.