The Design of Rolling Bearing Mountings

The deep groove ball bearings are fitted in X arrangementwith zero clearance (Technical SpecificationN13CA). The C3 radial clearance ensures a contactangle which is favourable for accommodating the axialguiding forces.Machining tolerancesCylindrical roller bearingsInner ring: Circumferential load; interference fit ontapered shaft 1:12.Outer ring: Point load; housing bore to K6.Deep groove ball bearingsShaft to j6 (k6),outer ring radially relieved in the housing.Lubrication, sealingThe bearings are automatically supplied with lubricant.Through a circumferential groove and lubricatingholes in the outer ring the lubricant is fed directlyinto the bearings. At the operator end the supply linesare usually connected to a central grease lubricationsystem. V-ring seals prevent both grease escape and dirtingresss. The bearings at the drive end are suppliedwith oil from the transmission oil lubrication systemvia feed ducts. The oil first flows through the cylindricalroller bearing and then through the deep grooveball bearing pair. At the cylinder end a pressurerelievedshaft seal retains the oil in the lubricatingsystem.113: Impression cylinder of a KBA Commander newspaper rotary printing press163 FAG