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The vibration and noise of bearings are classified as four classed as Z1,Z2,Z3 and Z4.It is measured by the instrument of S0910-1,For special requirement,it is measured by BVT-1 and classified as V1, V2, V3 and V4.The data are shown as below. Customer need mark their requirement of vibration and noise class on the order. RETAINERS-Farton Mitex & CTK standard bearing retainers are made from cold rolled carbon steel however, in cases of corrosive environment, misalignment,or high speed operation, stainless steel, or phenolic resins will be used upon request.
