Caster & Wheel Bearing

Bearings with a coating generally refer to those in which a layer of plastic is wrapped around the outer surface of the bearing. The plastic material used is usually nylon PA, polyformaldehyde POM, and engineering plastics polypropylene and PP. The outer coating of plastic has a certain hardness, impact resistance, wear resistance, and self-lubrication properties. Common used for plastic coating and injection molding Bearing models and usage   Deep groove ball bearing – 686 bearing: inner diameter 6mm, outer diameter 18.6mm, thickness 7.4mm, suitable for small injection molding pulley, with low noise, explosion-proof, wear-resistant and other characteristics. – 625 bearing: inner diameter 5mm, outer diameter 16mm, often used for injection molding wheels of small equipment, can reduce noise and reduce friction, and can be customized color. – 606 bearing: size is 8.5×21×25×R3, material is ppsu shaft steel, with quiet, shock absorption and other characteristics, color can be customized. – 695 bearing: inner diameter 5mm, outer diameter 13mm, thickness 4mm, suitable for furniture hardware accessories, movable doors and Windows and other injection molding pulley, sliding flexible, no noise. – 608 bearing: Often used in small machinery, furniture and other equipment injection wheel, can make the wheel more smooth rotation, carrying capacity is relatively small. -6200 bearing: inner diameter 10mm, outer diameter 30mm, thickness 9mm, suitable for some medium-sized equipment injection wheel, such as industrial small transport equipment. -6206 bearing: inner diameter 30mm, outer diameter 62mm, thickness 16mm, can withstand a certain radial and axial load, suitable for medium injection molding machine and other equipment wheels. Production Technology   Plastic-coated bearings generally refer to a layer of plastic on the outer bread of the bearing, and the plastic material is generally nylon PA, polyformaldehyde POM and engineering plastics polypropylene and pp. The outer plastic has a certain hardness, impact resistance, friction resistance and a certain self-lubricating type.   Plastic coated injection material   Polyformaldehyde (POM) , also known as steel, has excellent mechanical properties, high elastic modulus, high rigidity and surface hardness, small friction coefficient, wear resistance and self-lubrication excellence, second only to nylon but cheaper, good dimensional stability, can manufacture precision parts, suitable for making gears and bearings, etc., can also be used for pipeline devices. Nylon (PA) is a kind of engineering plastic, PA6, PA66, PA610, PA1010 and other types, high mechanical strength, good toughness, high tensile and compressive strength, outstanding fatigue resistance, wear resistance, corrosion resistance, heat resistance, non-toxic, excellent electrical properties, often used in the manufacture of bearings and other structural components. ‌Polypropylene (PP) is the lightest of the resin materials, excellent mechanical properties, including tensile strength, compressive strength and hardness, outstanding rigidity and resistance to bending fatigue properties. Good chemical stability, in addition to strong oxidants, and most chemicals do not react, suitable for use in acid-base environment. Polyethylene (PE) ‌ is a thermoplastic resin prepared by polymerization of ethylene monomer. The mechanical properties are general, the tensile strength is low, the creep resistance is not good, the impact resi