OEM PP/ABS/Nylon Injection Molding Plastic Gear for Auto Part

Lightweight: Reduce inertia and energy consumption. Corrosion Resistance: Ideal for wet, humid, or chemically exposed environments. Quiet Operation: Dampen vibration and reduce noise. Cost-Effective: Lower material cost and often produced via injection molding for high volumes at low unit cost. Self-Lubrication: Many plastics have inherent lubricity, reducing or eliminating the need for external lubricants. Design Flexibility: Complex geometries (like hubs and spokes) can be molded as one part.

Lower Strength & Load Capacity: Compared to metals, they handle lower torque and are more susceptible to impact failure. Temperature Sensitivity: Performance degrades at high temperatures; continuous use temperature is limited. Creep & Dimensional Stability: Under constant load, plastics can deform over time. Thermal Expansion: Higher coefficient of thermal expansion than metal, which must be accounted for in design.

Glass fibers (typically 10%-30%) significantly increase stiffness, strength, and heat deflection temperature. Use them for higher-load applications. However, they increase wear on mating gears and mold tools, and can reduce some impact toughness.

Yes, this is very common. A plastic gear meshing with a well-finished metal gear (often steel or brass) is an excellent combination. The metal gear provides strength and heat dissipation, while the plastic gear reduces noise and weight. Ensure the metal gear has a smooth surface finish to minimize wear on the plastic.

Tooth Profile: Involute is standard. Modifications like tip relief are often needed to compensate for molding shrinkage and deflection. Root Fillet: Generous fillets reduce stress concentration. Hub, Web, and Rib Design: Must balance material savings with strength and minimize sink marks that affect tooth geometry. Molding Gate Location: Critical to ensure uniform filling and minimize warpage in the gear teeth.