Plastic Balls
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Plastic balls are light and in low load applications do not need lubrication. Balls are made as standard in a variety of plastic other materials. We currently list balls in Nylon and Delrin.
Nylon
Nylon balls are used in valves, light-duty bearings, flowmeters, and numerous special applications where toughness, abrasion resistance, and being lightweight are more important than hardness.
The mechanical properties are as follows:
Hardness: 115 Rockwell ‘R’
Density: 1.14g cm3
Relative Density: 1.14
Water Absorption (24 Hours): 8%
Maximum Useful Temperature: 160°C
Delrin
Also known as Acetal, Polyacetal, and POM, Delrin is an engineering thermoplastic commonly used for precision parts that require high strength, hardness, and rigidity. It is a tough material with a low coefficient of friction and high abrasion resistance. It has good electrical and dielectric properties, low water absorption, and it’s FDA-approved. Naturally white in colour, it does accept opaque colours well and can be polished to a shine. It has good chemical resistance, but is sensitive to mineral acids, chlorine, and alkaline degradation. Common uses include pump parts, valve bodies, and bearings.
The mechanical properties are as follows:
Hardness: 115 Rockwell ‘R’
Density: 1.14g cm3
Relative Density: 1.14
Water Absorption (24 Hours): 0.9%
Maximum Useful Temperature: 105°C
Other Materials
Balls are also made in the following materials:
PTFE (Teflon)
Phenolic Resin
Polypropylene
Polystyrene
Polyethylene
Polycarbonate