TPI Bearings Japan, ZZ (Metal Shield)

Product Details

Since 1966 TPI has been leading the manufacturer by providing massive range of customized ball bearings for global industry. TPI Bearing are quality bearings are used throughout the world by major manufacturers who trust in our stable quality. Below, we've compiled detailed information on TPI's top products: Deep groove ball bearings Deep groove ball bearings are widely used bearing products. A deep groove is formed on each inner and outer ring of the bearing enabling them to sustain radial and axial loads in either direction as well as the combined loads which result from the combination of these forces.Deep groove ball bearings are suitable for high-speed applications. In addition to the open type, deep groove ball bearings come in a number of varieties, including pre-lubricated bearings, bearings with one or both sides sealed or shielded, bearings with snap rings and high capacity specification, etc. Pressed cages are generally used in deep groove ball bearings. However, machined cages are also used in larger sized bearings designed for high-speed applications. Shielded ball bearings Shielded ball bearings are deep groove ball bearings having the same boundary dimensions as those of open type bearings. Protection against the penetration of foreign material and the prevention of grease leakage are provided by the steel shield of these bearings. There are two types: ZZ (fitted with shields on both sides) and Z (fitted with a shield on one side). Since the shields are a non-contact type, friction torque is very low. Sealed ball bearings Like shielded ball bearings, sealed ball bearings have the same boundary dimensions as those of the open type bearings. Sealed ball bearings also have the function of keeping foreign matter out and grease in with seals. Seals consisting of synthetic rubber molded to a steel plate are incorporated into the outer rings of these ball bearings. There are two major types of sealed bearings: contact type and non-contact type sealed bearings. The LLU type is equipped with two contact seals, one on each side of the bearings while the LLB type uses non-contact type seals instead. Similar construction to LLU type, the LLH type sealed bearings perform better low torque characteristics than that of LLU type because of its special lip design. Basically, bearings with contact seals have excellent and effective functions of dust and waterproofing while bearings with non-contact seals are suitable for applications requiring low torque operation. Expansion compensating bearings Expansion compensating bearings have the same boundary dimensions as standard bearings, except that a high polymer material with a large coefficient of thermal expansion has been inserted along the outer circumference of the outer ring. Due to the extremely small difference of thermal expansion attained between the fitted surfaces of the high polymer and the light alloy bearing housing, a good interference fit can be achieved with stable performance across a wide temperature range. Another advantage is a large reduction in the occurrence of outer ring creeping. In cases where the bearing is going to be interference fit with the housing, it is very important not to damage the high polymer material. Regulations for radial internal clearance are the same as those for standard deep groove ball bearings. For standard fit and application conditions, a C3 clearance is used with this bearing.