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Formula: POM-H
Form: Rod
Material: Polyoxymethylene Homopolymer (POMh)
CAS Number: 9002-81-7
Commodity: Polymers
We offer POM Homopolymer Rods in a choice of 42 variations. POM, which stands for polyoxymethylene, is a thermoplastic polymer known for its high strength, stiffness, hardness and creep resistance. These homopolymer rods have uniform properties and are ideal for use in parts that require precision machining, such as gears, rollers and bushings. With high fatigue endurance and low friction, our POM rods are suitable for repetitive motion and sliding applications across a wide temperature range in fields, like automotive, medical devices and consumer appliances.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Rod
Diameter +20% / -10%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Poor
Acids - dilute Poor - Fair
Alcohols Good-Fair
Alkalis Poor
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good-Poor(?)
Halogens Poor
Ketones Good - Fair
Mechanical Properties
Element Value
Coefficient of friction 0.2-0.35
Hardness - Rockwell M94
Poisson's ratio 0.35
Elongation at break( % ) 40-75
Tensile modulus( GPa ) 2.9-3.1
Izod impact strength( J m⁻¹ ) 75-130
Tensile strength( MPa ) 70
Electrical Properties
Element Value
Dielectric constant @1MHz 3.7
Dissipation factor @ 1MHz 0.005
Dielectric strength( kV mm⁻¹ ) 20
Surface resistivity( Ohm/sq ) 10¹⁵
Volume resistivity( Ohmcm ) 10¹⁵
Physical Properties
Element Value
Flammability HB
Radiation resistance Poor
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 15
Water absorption - equilibrium( % ) 0.6-0.9
Water absorption - over 24 hours( % ) 0.25
Density( gcm⁻³ ) 1.42
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 170
Heat-deflection temperature - 1.8MPa( C ) 135
Upper working temperature( C ) 80-120
Specific heat( J K⁻¹ kg⁻¹ ) 1500
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.22-0.24@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 122

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