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Application of plastic ball is very widely in bearing. POM plastic balls & PA plastic balls have good mechanical strength and abrasive resistance. More precise plastic bearing is applicable. Specific gravity of plastic balls is between 1.41 - 1.43g/ cm³, and their operating temperature is between -60 - 120℃. Their intensity is higher and surface smooth, and none tension. POM plastic balls & PA plastic balls have good self-lubricating property can reduce friction. So, not only plastic bearing to ensure the basic function, and can more precision and high-speed operation .