The Design of Rolling Bearing Mountings

24 Double-shaft circular sawOperating dataInput power max. 200 kW;max. speed 2,940 min –1 .The cylindrical roller bearing FAG NU1026M at thedrive end is the floating bearing. Heat expansion in theaxial direction is freely accommodated in the bearing.The cylindrical roller bearing also accommodates thehigh belt pull tension forces.Bearing selectionA simple bearing arrangement is required with standardizedbearings which are suitable for very highspeeds and allow accurate shaft guidance. The requiredhigh shaft rigidity determines the bearing bore diameter.The locating bearing is at the work end in order to keepheat expansion in the axial direction as small as possibleat this end. The two spindle bearings FAGB7030E.T.P4S.UL are mounted in O arrangement.The bearings of the UL universal design are lightly preloadedby clamping the inner rings axially. The bearingpair is suitable for high speeds.Machining tolerancesShaft tolerance js5Housing tolerance JS6Lubrication, sealingThe bearings are greased for life, e.g. with FAG rollingbearing grease Arcanol L74V.Good sealing is required due to the dust arising duringsawing. Non-rubbing seals are used due to the highspeed. Flinger disks prevent the penetration of coarsecontaminants into the gap-type seals.24: Double-shaft circular saw37 FAG