Cylindrical roller bearings mainly used in all kinds of engine industry, including electrical engine, machine tool, oil, rolling mill loading and unloading machine and so on.
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Cylindrical roller bearing belongs to disjunctive bearings, which is very convenient both for loading and unloading. It can be divided into following type: single row, double row and four row cylindrical roller bearings.
According to the difference of ferrule block, single row cylindrical roller bearings can be separated as N series, NU series, NJ series, NF series, and NUP series and so on. Meanwhile, cylindrical roller bearings also have a high capacity of enduring radial load, it can also endure certain amount of unilateral or bidirectional axial load.
Double row cylindrical roller bearings as NN series and NNU series always with features of compact structure, high rigidity, high carrying capacity, very small distortion even with heavy load, so it mainly used as the supporting of principal axis of machine tool. FC series, FCD series and FCDP series four row cylindrical roller bearings have high carrying capacity of radial load, so it mainly in these heavy machine as rolling mill and so on.
N design
Inside track with two unitary flanges, while outside track without flange. Axes’s axial displacement to bearing block can be endured by bearing from two directions. Therefore, these bearings usually used as non position end bearings.
NU design
The outside track of NU design bearings has two unitary flanges, while inside track without flange. Axis’s axial displacement to bearing block can be duded by bearing from two directions. Therefore, these bearings usually used as non position end bearings. Due to the reason of manufacture and maintenance, two flanges of outside track of NU design big bearings showed on drawing maybe not unitary, but with loose fit-up flange rings.
NJ design
Outside track has two unitary flanges, inside track also with one unitary flange. Therefore, these bearings suitable for the axial orientation of axes from one direction.
NUP design
Outside track have two unitary flanges, while inside track with one unitary flange and one non-unitary flange in form of loose fit-up flange rings. These bearings can be used as position end bearings, that is to say can offer the axial orientation of axes from two directions.
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