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CNC Plastic Gears
What Can We Customize in CNC Plastic Gears?
Because every application has a different load path, gear design parameters must be evaluated individually. From tooth profile and module to bore diameter, hub configuration, and material grade, every parameter can be customized to meet your torque requirements, operating environment, and assembly constraints.
Shape
Dimensions
Material
Edge finish
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Custom CNC plastic Parts Solutions
Why Choose Zhongde?
Plastic gear failures often start with more than material selection — they start with a mismatch between design intent and manufacturing reality: a tolerance that looks acceptable on paper but cannot be maintained under thermal expansion, or a tooth profile designed for molding but not adapted for machining. Years of solving these challenges across different industries and applications have shaped how we evaluate every drawing we receive.
For example, a medical device customer needed a small-batch run of fine-pitch nylon gears for a diagnostic instrument. Injection molding was not practical at that volume, and standard gears could not meet the required bore tolerance. Machining directly from rod stock allowed us to achieve the specification without mold investment or tooling delays. In another case, an industrial automation customer experienced premature wear in POM gears operating under sustained load. By optimizing edge conditions and re-evaluating hub geometry within CNC design constraints, we extended service life without changing the material.
This problem-solving approach is supported by integrated capabilities in material selection, CNC machining, tolerance verification, and finishing. By keeping these processes closely connected, we reduce communication gaps and maintain quality consistency throughout the project. From prototype development to production runs, the same engineering team that reviews your design supports the manufacturing process.
Industries We Served
FAQs of CNC Plastic Gears
Injection molding requires a dedicated mold, which adds upfront tooling costs and makes design changes more difficult once production begins. CNC machining cuts gears directly from solid stock, making it a practical option for prototypes, low-volume production, and designs that require frequent iteration.
Achievable tolerances depend on gear size, material, and tooth geometry. CNC machining provides direct dimensional control for custom gears and avoids mold-related shrinkage variation. Specific tolerance requirements are reviewed and confirmed based on your drawing.
It depends on the material and operating conditions. UHMWPE and POM offer inherent self-lubricating properties suited to dry-running applications, while materials such as Nylon or PEEK may benefit from lubrication under high loads, speeds, or demanding environments.
Plastic gears can be finished with operations such as deburring, polishing, and edge chamfering to improve fit, reduce friction, or refine the running surface. Coating options are more limited than with metal gears because many engineering plastics already provide corrosion resistance and low-friction performance through the base material itself. If your application requires a specific surface modification, we can review the requirements.
Zhongde's Manufacturing Capabilities for Custom Parts
Injection Molding
CNC Machining
Compression Molding
Cast Molding