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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
- Polyamide
- Polyethylene
- PTFE
- Phenolic resin
Polyacetal (non filled material)
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Physical Properties for plastic balls
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| 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 |
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| Mechanical Properties for plastic balls |
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| 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 |
|
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| Thermal properties for plastic balls |
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| Coef. of linear thermal expansion (K-1) |
11 x 10-5
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| 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)
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| Physical Properties for plastic balls |
|
| Specific Gravity |
1.13-1.15 |
| Water absorption, 24h saturation (%) |
2.8 |
| Dielectric strength, short time (KV/mm) |
24 |
|
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| Mechanical Properties for plastic balls |
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| 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
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| 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 |
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| Specific Gravity |
0.941-0.965 |
| Dielectric strength, (KV/mm) |
150 |
|
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| Mechanical Properties for plastic balls |
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| 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 |
|
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| Thermal properties |
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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 |
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| Mechanical Properties |
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| 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 |
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| Thermal properties |
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| 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 |
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| 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 |
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| Thermal properties |
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| Coef. of linear thermal expansion (K-1) |
13 x 10-5
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| 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
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| Physical Properties for plastic balls |
|
| Specific Gravity |
1.32-1.87 |
| Water absorption, 1/8" thick specimen, 24h saturation (%) |
0.1-0.6 |
|
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| Mechanical Properties for plastic balls |
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| Compressive strength (max stress) (MPa) |
43 |
| Compressive modulus(MPa) |
3900 |
| Shock impact (Charpy) (Kj/m2) |
10-15 |
| Hardness Rockwell |
H50-90 |
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| Thermal properties |
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| Coef. of linear thermal expansion (K-1) |
7-12 10-5
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| Deflection temperature Flexural load oF @1.8MPa |
88 |
| @0.45MPa |
96
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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 |
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