Multi-Row Roller Bearings  

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Multi-Row Roller Bearings are primarily designed and used as roll-neck bearings in rolling mills. The four rows of rollers lends itself to carry large radial loads for the given bearing cross section. Contoured rollers with tight diametrical tolerances maximize the ability of this bearing to evenly distribute the load to all four rows. Most common types include the use of a machined brass finger cage or a machined mild steel finger cage. No suffix is required for the brass cage but the SM suffix is used for the steel. In larger sizes, the use of a steel pin type cage with hollow rollers is standard. Many outer race and inner race configurations and design types are available to meet installation or interchangeability requirements. Most bearings are supplied with C4 Internal Radial Clearance and P5 Accuracy to perform well in these roll neck applications.


A big advantage of multi-row  roller bearings is their very high radial load capacity. Due to the large number of rolling elements the impact force is well distributed. The friction is lower than at other multi row bearing types. Multi row cylindrical roller bearings cannot absorb axial forces. However, in service an axial displacement is possible.


Bearing Number Bore Dia Outer DIa Width Size
NTN  NN4932K Multi-Row Roller Bearings   NTN  NN4932K 1 pcs Negotiable
NTN  NN3934 Multi-Row Roller Bearings   118000 lbf 33.5 6580 -0.52 in
NTN  NNU4944 Multi-Row Roller Bearings   Shroud Seal 149.2 mm 5.801 lb 17.5 mm
NTN  NNU4926 Multi-Row Roller Bearings   Carbon Steel - Corro No Fitting 10 ° Precision
NTN  NNU4948K Multi-Row Roller Bearings   6.0781 in Spherical Roller One expansion unit i Lubrication Fitting
NTN  NNU3130 Multi-Row Roller Bearings   NTN  NNU3130 1 pcs Negotiable
NTN  NN4956 Multi-Row Roller Bearings   0.02 KGS In Stock Open Type 75mm
NTN  NN4936 Multi-Row Roller Bearings   8.6250 in 5/8 in Lubrication Fitting 2.3125 in
NTN  NNU4920 Multi-Row Roller Bearings   25mm 16.25mm Open Type Steel
NTN  NN4964 Multi-Row Roller Bearings   LO609/ 1-7/16 4.5 Kg Cast Iron 190
NTN  NN3020K Multi-Row Roller Bearings   15 ° 9300 C0 Open
NTN  NNU3072 Multi-Row Roller Bearings   Standard In Stock 176mm 23164-k-mb-qbl