Cylindrical roller bearings features

1 roller and raceway contact or repair offline contacts, radial load capacity, suitable to withstand heavy load and shock load.
2 small friction coefficient, suitable for high speed, speed close to deep groove ball bearings.
3.N type and NU type can move axially, to accommodate misalignment due to thermal expansion or of the shaft and the housing due to changes in relative position, can be used for supporting the free end.
4 pairs of shaft or housing bore machining higher, bearing outer ring axis relative deflection after installation should be strictly controlled to avoid contact stress concentration.
5 inner or outer ring detachable, easy installation and removal.

Needle roller bearings (NK, NKS, RNA49, RNA48, NKL, NKLS, NA49, NA48, RNA69, NA69, RNA49 ... RS, RNA492RS, NA49RS, NA492RS, RNAO, NAO) compact structure, small radial size, load capacity, withstand greater radial load. Such a variety of structure and size of the bearing series, the needle assembly G2 level, grouping batches diameter variation in less than 2um, except full complement needle roller bearings are made of high resistance cage, able to correctly guide the needle parallel to the axis .
Different structures, different types, different direction of the force to withstand, at different speeds, different loads, different materials, the application of different occasions etc.
Fundamental difference: tapered roller backing bearings rolling body is tapered roller; needle roller bearings needle roller is rolling;
These fundamental difference determines the structure of tapered roller bearings Needle roller bearings relative to a large, tapered roller in addition to radial force than can withstand axial force, and needle roller bearings can withstand radial forces; tapered roller single row bearings of double row and multi-row, were applied to different environments and situations; tapered roller bearings Needle roller bearings with respect to higher operating speed; tapered roller bearings are generally of high quality bearing steel and special steel products; The thin-walled needle roller bearing is used in steel stamping; Together, these two types of bearings are not the same type of bearing, there are too many differences, have compared some really far-fetched needle roller bearing is thin and long roll needle and cage. Cylindrical roller bearings. Is composed of cylindrical and rollers. Column than the needle thick, also known as coarse needle.