タイトルまたは説明

Cylindrical roller bearings are available in many designs, series and sizes. The majority are single row bearings with a cage. High-capacity bearings, single and double row full complement bearings (without a cage) complete the best standard assortment listed in this catalogue. Bearings with a cage can accommodate heavy radial loads, fast accelerations and high speeds. Full complement bearings incorporate a maximum number of rollers and are therefore suitable for very heavy radial loads at moderate speeds. high-capacity cylindrical roller bearings combine the high load carrying capacity of a full complement bearing with the high speed capability of a bearing with a cage. The factors that influence best cylindrical roller bearing performance and service life include but are not limited to the following:Roller end / flange contact area,Logarithmic roller profile,Surface finish.Interchangeable components,The best range of cylindrical roller bearings comprises the basic types,single row cylindrical roller bearings, caged, mainly of the NU, NJ, NUP and N designs,double row cylindrical roller bearings, caged, mainly of the NNU and NN designs,multi-row cylindrical roller bearings, caged,single row full complement cylindrical roller bearings, mainly of the NCF and NJG designs,double row full complement cylindrical roller bearings, mainly of the NNF design,multi-row full complement cylindrical roller bearings, with four or eight rows of rollers .Common roller bearings use cylinders of slightly greater length than diameter. Roller bearings typically have higher load capacity than ball bearings, but a lower capacity and higher friction under loads perpendicular to the primary supported direction. If the inner and outer races are misaligned, the bearing capacity often drops quickly compared to either a ball bearing or a spherical roller bearing.Roller bearings are the earliest known type of rolling-element-bearing, dating back to at least *0 BC.