... Steel, 3.High quality&Fast Delivery Factory Insert Ball Bearing with Collar four-star, with the top wire ball ... 2.Outer diameter: from 47mm to 300mm:3.Material:bearing steel/chrome steel--China,(AISI)52100--American,(Din)100Cr6 ... Machinery, Fitness equipment, Washing Machine, Office equipment. Dimensions(mm)Bearing Unit No.Shaft Dia d mmaeiglzsUCF202158664151125.530.912UCF203178664151125.530.912UCF ...