Plastic balls are manufactured from standard and special polymer resins in sizes from 1mm to 180mm.

Plastic balls are a cost-effective substitute for steel balls for some applications. They are in aerosol spray cans, lightweight check valves, medical diagnostics, light bearings, drawing slides and a wide variety of other applications.

Tolerances to +/-0.0005″ (+/-0.0125mm). Surfaces can be tailored from rough to highly polished finishes.

Polyacetal (non filled material)
 Physical Properties for plastic balls
 Specific Gravity 1.41-1.42
 Water absorption, 1/8″ thick specimen, 24h saturation (%) 0.20-0.40
 Dielectric strength, 1/8″ thick specimen, short time (kV/mm) 60-70
 Mechanical Properties for plastic balls
 Tensile strength at break (MPa) 2800-3600
 Elongation at break (%) 25-75
 Tensile yield strength (Mpa) 62-84
 Tensile modulus (MPa) 2800-3600
 Compressive strength (rupture or yield) (MPa) 124 (10%)
 Compressive modulus (MPa) 4620
 Flexural strength (rupture or yield) (MPa) 90-98
 Flexural modulus(MPa) 2620-2960
 lzod impact. (J/m).of notched 54-122
 Hardness Rockwell M78-M94
 Thermal properties for plastic balls
 Coef. of linear thermal expansion (K-1) 11 x 10-5
 Deflection temperature Flexural load oF @1.85MPa (°C) 106-114
 @0.46MPa (°C) 150-170
 Thermal conductivity Wm-1K-1 0.8-1.1
 Maximal temperature of use without strength (°C) 90-110

Polyamide (PA 6.6)
 Physical Properties for plastic balls
 Specific Gravity 1.13-1.15
 Water absorption, 24h saturation (%) 2.8
 Dielectric strength, short time (KV/mm) 24
 Mechanical Properties for plastic balls
 Tensile strength at break (MPa) 85
 Tensile modulus (MPa) 3450
 Elongation at break (%) 45
 Flexural modulus(MPai) 3200
Shock impact (Charpy) KJ / m2 3
 Hardness Rockwell R120
 Thermal properties for plastic balls
 Coef. of linear thermal expansion  (K-1) 8-9.5 x 10-5
 Deflection temperature Flexural load oF @1.8MPa (°C) 70
 @0.45MPa (°C) 245
 Maximal temperature of use without strength (°C) 110
Polyethylene High Density
 Physical Properties for plastic balls
 Specific Gravity 0.941-0.965
 Dielectric strength,  (KV/mm) 150
 Mechanical Properties for plastic balls
 Tensile strength at break (MPai) 17-31
 Elongation at break (%) 400-1000
 Tensile yield strength (MPa) 27-28
 Flexural modulus(MPa) 1250
Shock impact (Charpy) KJ/m2 4
 Hardness Shore D67
 Thermal properties
 Deflection temperature Flexural load oF @1.045MPa (°C) 95
Polyamide (Nylon 66)
Physical Properties
Specific Gravity 1.13-1.15
Water absorption, 1/8″ thick specimen, 24h saturation (%) 1.0-1.3
Dielectric strength, 1/8″ thick specimen, short time (V/mil) 600b
Mechanical Properties
Tensile strength at break (psi) 12.000b 11.000c
Elongation at break (%) 60b 300c
Tensile yield strength (psi) 8000b 6500c
Compressive strength (rupture or yield) (psi) 15.000b(yld.)
Flexural strength (rupture or yield) (psi) 17.000b 6100c
Tensile modulus (103 psi) /
Compressive modulus (103 psi) /
Flexural modulus(103 psi) 420b 185c
lzod impact. Ft-lb/.in.of notch (1/8″ thick specimen) 0.8-1.0b 2.1c
Hardness Rockwell/Shore R120b M83b
Thermal properties
Coef. of linear thermal expansion (106in./in/oC) 80
Deflection temperature Flexural load oF @264psi 167b
@66psi 474b
Thermal conductivity 10-cal.-cm/sec-cm2-oC 5.8

PTFE
 Physical Properties for plastic balls
 Specific Gravity 2.14-2.20
 Dielectric strength, 1mm thick specimen  (KV/mm) 36
 Mechanical Properties for plastic balls
 Elongation at break (%) 300-400
 Compressive strength (MPa) 7-8
 Tensile modulus (MPa) 750
 Flexural modulus(MPa) 600-1000
 lzod impact.J/m of notched 350-500
 Hardness Shore D50-60
 Thermal properties
 Coef. of linear thermal expansion (K-1) 13 x 10-5
 Deflection temperature Flexural load oF @1.82MPa (°C) 50-60
 @0.45MPa (°C) 130-140
 Thermal conductivity W/m-1/K-1 0.25
Friction coefficient 0.05-0.08

Phenolic resin
 Physical Properties for plastic balls
 Specific Gravity 1.32-1.87
 Water absorption, 1/8″ thick specimen, 24h saturation (%) 0.1-0.6
 Mechanical Properties for plastic balls
 Compressive strength (max stress) (MPa) 43
 Compressive modulus(MPa) 3900
 Shock impact (Charpy) (Kj/m2) 10-15
 Hardness Rockwell H50-90
 Thermal properties
 Coef. of linear thermal expansion  (K-1) 7-12 10-5
 Deflection temperature Flexural load oF @1.8MPa 88
 @0.45MPa 96

GRADE
0 I II III
Inches mm Inches mm Inches mm Inches mm
Sphericity 0.0005 0.0125 0.0005 0.0125 0.001 0.025 0.005 0.125
Tolerance +/-0.0005 0.0125 +/-0.001 0.025 +/-0.002 0.050 +/-0.005 0.125
Surface Polished Polished Unpolished