Characteristic of pom processed parts
Material characteristics
Outstanding mechanical performance: tensile strength ≥ 70MPa, bending modulus up to 2.8-3.8GPa, surface hardness (Rockwell M94) equivalent to aluminum alloy, meeting the mechanical requirements of complex working conditions
Excellent fatigue resistance: No significant plastic deformation after 10 ^ 7 cycles of testing, especially suitable for reciprocating motion mechanisms
Low friction coefficient: The dynamic friction coefficient is only 0.2-0.3, and the self-lubricating performance allows the parts to operate stably in oil-free environments
Dimensional stability: The linear thermal expansion coefficient is only 1/8 of that of aluminum metal, and the dimensional change rate is less than 2 × 10 ⁻⁵/℃ (-40 ℃~120 ℃)
Processing adaptability: The tolerance range for processing is ± 2 μ m (ISO 2768-mK grade), and the surface roughness can reach Ra0.1 μ m (mirror grade)
Environmental adaptability
Strong chemical corrosion resistance, able to withstand pH 2-13 environment, resistant to weak acids, organic solvents, and oil penetration
Excellent weather resistance: yellowing index<2 after 1000 hours of UV aging test, tensile strength retention rate>85%
Can withstand working temperatures ranging from -40 ℃ to 120 ℃, and can withstand extreme environments up to 150 ℃ in the short term
Processing advantages
The processing efficiency is increased by more than 40% compared to cast iron/aluminum alloy, and the tool wear rate is reduced by 60%
Capable of micro level hole machining (minimum blind hole diameter 0.5mm, depth ratio L/D=10:1)
Support complex surface machining, optional hardening treatment for surface treatment (hardness increased to HRC>60)
Typical application scenarios of pom machined part
Industrial transmission system
Precision bearing cage
gear assembly
Ball slide rail guide component
High precision electronic devices
Camera module positioning bracket
Optical instrument moving parts
Chip testing probe holder
Core components of automobiles
Injector valve body
Transmission fork
Sensor bracket
Medical equipment
Micro pump valve components
Transmission mechanism of dialysis equipment
Diagnostic instrument drive screw
Advantages
The advantages of POM machining plastic parts are manifold, making it a preferred choice in demanding applications. Chief among these is its mechanical robustness; POM’s high tensile strength (70–75 MPa) and modulus of elasticity (3 GPa) enable it to withstand significant mechanical stress without deformation, while its toughness ensures resistance to impact and fatigue, even in cyclic loading scenarios. Its low friction coefficient and self-lubricating properties reduce wear and energy loss, making it ideal for moving parts in gears, bearings, and sliders. POM’s dimensional stability is another critical advantage; its low thermal expansion coefficient (10⁻⁵ K⁻¹) ensures consistent performance across temperature fluctuations, while its resistance to creep and stress relaxation maintains precision over time. The material’s chemical inertness further enhances its versatility, allowing it to function in aggressive environments without degradation, provided it is shielded from strong oxidizers and polar solvents. Moreover, POM’s machinability surpasses that of many engineering plastics; its ease of machining reduces production time and tool wear, while its polished surface finish requires minimal post-processing, lowering overall manufacturing costs. These attributes collectively position POM as a material of choice for applications requiring high reliability, precision, and durability.
