Engineering plastics can be machined into lightweight, insulating, chemically resistant, or low-friction components. Their dimensional behavior and operating limits require closer review than many metal parts.
Material Comparison
- POM: Good dimensional stability and low friction.
- PTFE: Very low friction, broad chemical resistance, and electrical insulation.
- Nylon: Good toughness and wear resistance, with moisture absorption to consider.
- PC: High impact resistance and useful rigidity.
- PEEK: High-performance mechanical, chemical, and elevated-temperature properties.
- PEI: Dimensional stability, electrical insulation, and elevated-temperature capability.
Design and Machining Considerations
Cutting heat, internal stress, moisture, and part geometry can affect finished dimensions. Thin walls and unsupported features may deform during machining and should be reviewed with the required tolerances.
Define the Operating Conditions
Provide the expected temperature, moisture and chemical exposure, mechanical loads, friction requirements, and any electrical insulation requirement. These conditions matter more than selecting a plastic by name alone.