The Design of Rolling Bearing Mountings

Roll mountings of a two-high ingot slab stand106 or ingot billet standOperating dataRoll diameter 1,168 mm (46"); roll body length3,100 mm (122"); rolling speed 2.5...5 m/s; yearlyoutput of 1 million tons. The mill operates as a reversingstand, i.e. the rolled material moves back andforth, and the sense of rotation of the rolls alternatesfrom pass to pass.The bearing rings are loosely fitted on the roll neckand in the chocks for easy mounting and dismounting.The cones creep on the roll neck in circumferential direction.To reduce wear and heat generation, the fittingsurfaces are usually supplied with grease through a helicalgroove in the bearing bore.Roll bearingsThe work rolls in this example are also supported onmulti-row tapered roller bearings. These bearings requirerelatively little mounting space and accommodatehigh radial and thrust loads. The rolls are supportedat each end on a four-row tapered roller bearingFAG 514433A (dimensions 730.25 x 1,035.05x 755.65 mm).LubricationThe tapered roller bearings are lubricated with greasewhich is continually supplied through grooves in thefaces of cone and spacer ring.Excess grease escapes through the bores in the centralcup and in the spacers.106: Roll mounting of a two-high ingot slab stand or ingot billet stand149 FAG