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> Carbon Steel Ball > Chrome Steel Ball > Stainless Steel Ball > Hollow Ball > Burnishing Media > Brass and Bronze Ball > Ceramic Ball > Plastic Ball Home > Products > Plastic Ball       C Plastic Ball           Tan Kong specializes in precision plastic balls,available in the following grades and materials.   Grade Diameter Tolerance Roundness Tolerance Diameter Tolerance Roundness Tolerance Unit inch inch mm mm 0 0.0005 0.0005 0.0127 0.0063 1 0.001 0.0005 0.0254 0.0127 2 0.002 0.001 0.050 0.025 3 0.005 0.005 0.127 0.127 4 0.015 N/A 0.381 N/A       Material and Characteristics   Item POM PA66 PP Delrin AF Material Polyacetal Nylon 66 Polypropylene 20% Teflon+80% Delrin Density(g/cc) 1.42 1.14 0.91 1.50 Hardness (Rockwell R scale) 120 110 90 115 Wear resistant (kgf/cm2 ) 0.37 0.18 385~560 0.19 Wear Absorption(%) 0.22~0.25 8.4 0.03 0.2 Heat Resistance (°C) 160~170 180~230 120 340 Resistance to weak acid Ο Δ ◎ Ο Resistance to strong acid × × Δ × Resistance to weak alkali Ο ◎ ◎ Ο Resistance to strong alkali Ο Ο Ο Ο Resistance to organic solution Ο Ο Ο Ο Feature High strength and stiffness,enhanced dimensional stability, and is easy to machine Excellent wear resistance,good tensile strength; high durability Light weight,good dielectric;good tensile strength Colors easily, Matte surface finish Good wear/heat resistance; good corrosion resistance Dark brown color ×poor Δ fair Ο good ◎excellent

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