Balaji International

Delrin/Polyacetal Rods

Delrin/Polyacetal Rods

Product Description

Polyacetal (POM) sheets and rods are among the strongest and stiffest of all thermoplastics. Plastic materials are characterized by good fatigue life, low moisture sensitivity, and high resistance to solvents and chemicals. Polyacetal products also contain good electrical properties. Homo-polymer and Copolymer grade of Polyacetal are available including an enhanced bearing grade material.

Polyacetal – POM is a semi crystalline engineering plastic that is beneficial to engineering applications, and is suited to CNC machining.

Typical Application

  • Gear wheels with small modulus Cams
  • Heavily loaded bearings and rollers
  • Bearing and gears with small clearances
  • Valve seats
  • Snap fit assemblies
  • Snap fit assemblies
  • Electrically Insulating Components


  • High Mechanical Strength
  • Excellent Resilience
  • Excellent Machinability
  • Physiologically Inert (most grades are suitable for food contact)


Sheet: Thickness 6-100mm
SIzes: 610mm x 1200mm X 2000mm, 1000mm x 2000mm
Rod: diameter x length
16-200mm X 1000mm


Sheets | Rods | Square Rods | Profiles

Mechanical Properties

Performance and test conditions Test Method Unit Typical Values
Notched impact strength of cantilever beam, 23°C ASTM D256 KJ/m² 10
Yield tensile strength, 23°C, 50mm/min ASTM D638 Mpa 60
Elongation at break, 23°C, 50mm/min ASTM D638 % 25
The bending strength. 23C, 2mm/min ASTM 790 Mpa 70
Bending modulus, 23°C, 2mm/min ASTM 790 Mpa 2500
Shore hardness D ASTMD2240 85
The Density ISO 1183 g/cm3 1.42

Thermal Performance

Performance and test conditions Test Method Unit Typical Values
Thermal deformation temprature(HDT) (0.45Mpa) ISO 75 °C 120
Melting Point °C 170
Long term operating temperature °C 100
Short-term operating temperature °C 120
Thermal conductivity DIN 52612-1 W/(K-M) 0.33
Linear expansion coefficient ASTM D696 10-5-1/K 13

Electrical Performance

Performance and test conditions Test Method Unit Typical Values
Dielectric strength ASTM D150 KV-mm 19
Dielectric loss coefficient ASTM D150 0.007
The volume resistance ASTM D257 Ω.cm 1015
The surface resistance ASTM D257 1015
Dielectric constant ASTM D149 3.7
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