... ,p5,p6; Bore Size: 50 - 860 mm 1,needle roller bearing NA49102,OD:72MM ; ID:50MM 3,Seals Type: Open 4 ... increase of radial clearance , take the place of high speed angular contact ball bearings ,8,Widely used in automobiles, tractors, machine tools ... : Inner ring in plastic bag,outer with box needle roller bearing