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Formula: POM-C
Form: Ball/Sphere
Material: Polyoxymethylene Copolymer (POMc)
Commodity: Polymers

POM Copolymer Balls

Goodfellow offers a range of POM Copolymer Balls in various quantities. POM, or polyoxymethylene, is a high-performance thermoplastic known for its excellent dimensional stability, low friction, and high rigidity. These precision polymer balls provide uniform, near-perfect sphericity. Their outstanding wear resistance makes them ideal for applications in food processing equipment, conveying systems, and precision ball bearings. With Goodfellow's selection of POM Copolymer Balls, engineers can find the right fit for projects demanding precision, low friction, and chemical resistance.
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Tolerances

Ball/Sphere
Diameter Standard ±5%
Diameter Precision See Item

Material Properties for Polymers

Chemical Resistance
Electrical Properties
Physical Properties
Mechanical Properties
Thermal Properties
Chemical Resistance
Element Value
Acids - concentrated Poor
Acids - dilute Good-Fair
Alcohols Good-Fair
Alkalis Good
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good-Poor
Halogens Poor
Ketones Good - Fair
Electrical Properties
Element Value
Dielectric constant @1MHz 3.7-4.4
Dissipation factor @ 1MHz 0.006-0.18
Dielectric strength( kV mm⁻¹ ) 20@2.3mm
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( % ) 0.6-0.8
Water absorption - over 24 hours( % ) 0.2-0.25
Density( gcm⁻³ ) 1.41
Mechanical Properties
Element Value
Hardness - Rockwell M80
Poisson's ratio 0.35
Elongation at break( % ) 15-40
Tensile modulus( GPa ) 2.3-2.8
Izod impact strength( J m⁻¹ ) 70-80
Tensile strength( MPa ) 60-70
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 160
Heat-deflection temperature - 1.8MPa( C ) 110
Lower working temperature( C ) -40
Upper working temperature( C ) 80-120
Specific heat( J K⁻¹ kg⁻¹ ) 1500
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.23-0.3@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 80-120

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