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Kunststoffkugeln

Kunststoffkugeln werden aus Standard- und Spezial-Polymerharzen in Größen von 1mm bis 180mm hergestellt.

Kunststoffkugeln sind bei manchen Anwendungen ein kostengünstiger Ersatz für Stahlkugeln. Sie werden in Aerosolsprühdosen, leichten Rückschlagventilen, medizinischen Diagnosegeräten, leichten Lagern, Schubladen und zahlreichen anderen Anwendungen eingesetzt.

 

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

 

Data are indicative and can not bind the responsability of Preciball.

 

 
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

Data are indicative and can not bind the responsability of Preciball.

 

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

Data are indicative and can not bind the responsability of Preciball.

 

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

Data are indicative and can not bind the responsability of Preciball.

 

 

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