Precision Injection-Molded Gearbox Housing Set

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Precise Injection Molds

Precision Injection-Molded Gearbox Housing Set

This precision-engineered gearbox housing set is a pair of matched, one-piece injection-molded plastic components, designed to enclose and support gear trains in small motors, RC vehicles, automation actuators, and miniature transmission systems. Manufactured with high-precision molds and premium engineering plastics, the housing set delivers exceptional dimensional accuracy, structural rigidity, and long-term durability, ensuring smooth, low-noise gear operation. As a professional custom plastic component and wire harness supplier, we offer full OEM/ODM solutions, supporting 1:1 mold development, material customization, and structural optimization to meet your specific gearbox design requirements.

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Core Design & Structural Advantages

Matched Left/Right Housing Set: The two-piece design is precision-machined for perfect alignment, creating a sealed, rigid enclosure for gear trains, eliminating misalignment and reducing operational noise.
Integrated Bearing & Shaft Seats: Precisely positioned central bearing bores and mounting bosses ensure secure, coaxial installation of gears and shafts, minimizing vibration and wear during operation.
Reinforced Rib & Boss Structure: Thickened walls and integrated reinforcing ribs enhance impact resistance and load-bearing capacity, preventing deformation under high-torque conditions.
Multi-Functional Mounting Features: Integrated threaded inserts, mounting holes, and alignment pins simplify assembly with motors, chassis, and other components, streamlining production and reducing assembly errors.
Optimized Gear Cavity: The internal cavity is designed to accommodate standard gear ratios, with smooth internal surfaces to reduce friction and ensure unobstructed gear rotation.
Durable Matte Finish: The textured, matte surface resists scratches and wear, while providing excellent chemical and UV resistance for long service life in demanding environments.

Core Technical Parameters & Tolerance Table

Parameter Category	Standard Specification	Customization Range	Tolerance Requirement
Core Process	Precision Injection Molding	Insert Molding / Ultrasonic Welding Optional	Overall Dimensional Tolerance: ±0.02mm
Base Material	Glass-Fiber Reinforced PA66 (Nylon)	POM, ABS, PP+GF, Custom Engineering Plastics	Compliant with RoHS, REACH, IATF 16949
Operating Temperature	-40°C ~ +120°C (PA66-GF30)	High-Temperature Resistant Materials Up to 150°C	Heat Deflection Temperature: ≥200°C
Central Bore Size	Standard φ6mm / φ8mm Bearing Seats	Customizable per Shaft/Bearing Size	Bore Tolerance: H7 (±0.015mm)
Mounting Hole Specification	Standard φ3mm / φ4mm Through Holes	Customizable Hole Size & Spacing	Hole Position Tolerance: ±0.05mm
Surface Finish	Matte Black Textured	Custom Color, Surface Coating, Texture	Surface Roughness Ra ≤3.2μm
Structural Strength	Tensile Strength ≥150MPa (PA66-GF30)	Optimizable per Load Requirements	Notched Impact Strength ≥15kJ/m²
Minimum Order Quantity	1,000 Sets (Mold Opening) / 5,000 Sets (Mass Production)	Small-Batch Trial Production Supported	Mass Production Lead Time: 7-15 Working Days

Material Selection & Performance Assurance

Material Type	Core Features	Ideal Application Scenarios
Reinforced PA66 (Nylon + 30% Glass Fiber)	High strength, heat resistance, chemical corrosion resistance, excellent mechanical properties	RC vehicles, automotive actuators, high-torque gearboxes
POM (Polyoxymethylene)	Low friction, excellent dimensional stability, wear resistance	Precision transmission, low-load gearboxes, consumer electronics
ABS (Acrylonitrile Butadiene Styrene)	High impact resistance, good surface finish, cost-effective	General-purpose gearboxes, small appliances, hobbyist applications
PP+GF (Polypropylene + Glass Fiber)	Lightweight, chemical resistance, low cost	Low-load, non-critical gearbox applications

Application Scenarios

RC Hobby & Model Vehicles: Gearbox housings for RC cars, trucks, drones, and robotic models.
Automotive Electronics: Small motor gearboxes for window lifters, seat adjustment, and automotive actuators.
Home Appliances: Gearbox enclosures for small motors in coffee machines, electric tools, and smart home devices.
Industrial Automation: Miniature gearboxes for robotics, conveyor systems, and precision automation equipment.

Customization & Service Support

Full Customization: We support 1:1 mold development based on customer 3D/2D drawings or samples, with free DFM (Design for Manufacturability) analysis to optimize design for cost, performance, and manufacturability.
Rigorous Quality Control: Our production follows IATF 16949 and ISO 9001 quality management systems, with 100% dimensional inspection via CMM and 2D vision systems, ensuring perfect fit and alignment for mass production.
Comprehensive Post-Processing: Offers secondary operations including surface coating, flame retardant treatment, and custom assembly to deliver fully finished, ready-to-install components.
Global Supply Chain Support: Provides flexible packaging, international logistics (sea/air/express), and dedicated customer service to ensure seamless procurement for global clients.

Packaging & Delivery

Packaging: Neutral cartons with EPE foam protection, or custom branded packaging as required, to prevent damage during transit.
Lead Time: Mold development: 15-25 working days; Mass production: 7-15 working days (adjustable based on order quantity).
Payment Terms: T/T, L/C, and other standard international trade terms supported.
Logistics Options: DHL, FedEx, sea freight, air freight, and other global shipping solutions available.