super precision bearings

This reduces the demand on thelubricant and leads to lower temperatures.Consequently, higherspeeds are permissible and the servicelife is extended to a significantdegree. Furthermore, ceramicrollers lead to increased static anddynamic rigidity and their lowerthermal expansion coefficient defusesan increase in preload at elevatedtemperatures.Thanks to the high surface qualityof ring raceways and rollers, FAGcylindrical roller bearings are particularlysuitable for grease lubrication.The grease distribution runhas to be carried out especiallycarefully since they comprise lipsat one ring.In the case of oil lubrication, attentionhas to be paid to their loweroil requirement in comparisonwith angular contact ball bearings.The oil circuits have to be keptseparate if these two bearing typesare mounted side by side. Excesslubrication due to oil flow from theangular contact ball bearings has tobe avoided as a sharp increase inbearing temperatures is to be expectedotherwise.7: Hybrid cylindrical roller bearings HCN..FAG · 85