NUP311 bearing 1.Sizes:Inner Diameter:55mm Outer Diameter:120mm Width:29mm 2.Structure Type:The outer ring has double flanges, while the inner ring has single flanges and a flat retaining ring. 3.Material: Gcr15/Bearing steel 4..Accuracy:P0/P6/P5/P4 5.Cage:Pressed steel, machined brass 6.Primary Application Range：Large speed reducers, mining machinery, crushers 7.Delivery time: 7 working days 8.Customization: OEM service 9.Samples: Sample service available https://www.atlycbearing.com/nup/nup311-bearing