What are the main advantages of Polyoxymethylene over other engineering plastics?

Polyoxymethylene offers several key advantages: exceptional dimensional stability, low moisture absorption, excellent fatigue resistance, and outstanding wear properties. Compared to nylon, POM maintains its mechanical properties better in moist environments. Unlike PTFE, it has higher mechanical strength while still providing good friction characteristics. These properties make Polyoxymethylene ideal for precision mechanical components that require long-term performance reliability.

How does temperature affect Polyoxymethylene performance?

Polyoxymethylene performs well in a temperature range from -40°C to 100°C (-40°F to 212°F) for continuous use, with short-term peak performance up to 140°C (284°F). Below -40°C, POM becomes increasingly brittle. Above 100°C, gradual loss of mechanical properties occurs. For high-temperature applications, we recommend our special heat-stabilized Polyoxymethylene grades that maintain better properties at elevated temperatures. Proper design should always account for thermal expansion (coefficient of linear thermal expansion is approximately 10-12 x 10^-5/°C).

What are the machining recommendations for Polyoxymethylene?

Polyoxymethylene machines exceptionally well, but requires specific considerations: use sharp tools with positive rake angles, maintain moderate cutting speeds (100-300 m/min for turning), and use adequate cooling (compressed air preferred over wet cooling). For drilling, use spiral-flute drills with 90-120° point angles. When milling, climb milling produces better results. All machining operations should aim to prevent overheating, which can cause dimensional changes. Post-machining annealing at 120-140°C (248-284°F) for 1 hour per 25mm thickness is recommended for critical precision parts to relieve internal stresses.