Four Row Bearings

Four row tapered roller bearingsare specially designed for rolling mill applications where their thin cross-section height and increased width provide higher capacity. The difference between a TQO bearing and a 2TDIW bearing design is relatively minor, as each uses two TDI cones.

The TQO design uses two TDI cones, one double cup in the middle, two single cups one on each end, two cup spacers, and a cone spacer.
The 2TDIW design uses two TDI cones, four single cups, three cup spacers. The cones are match ground, therefore no cone spacer is required.
Either design can be supplied depending on the preference of the mill; however, the TQO is the most commonly used design.

There are a variety of special features that can be incorporated in the design of four row tapered rolling bearings, such as face notches, helical bore grooves, extended cones, re-lubrication accommodations, cups and/or cone seals, etc.

Bearing Number	Bore Dia	Width	Size
NTN CRO-6031LL Four Row Bearings	Mounted Units & Inserts	N/A	0.186
NTN CRO-19001 Four Row Bearings	Pillow Block	N/A	31.326
NTN EE522126D/523087/523088D Four Row Bearings	Insert Bearings	N/A	3.66
NTN 6259/500 Four Row Bearings	Bearings	N/A	0
NTN CRO-6910 Four Row Bearings	Flange Block	N/A	19.522
NTN EE921150D/921875/921876D Four Row Bearings	Cylindrical Roller Bearing	N/A	0.55
NTN T-HM262749D/HM262710/HM262710DG2 Four Row Bearings	Mounted Units & Inserts	N/A	10.442
NTN 623124 Four Row Bearings	Pillow Block	N/A	19.522
NTN EE547341D/547480/547481DG2 Four Row Bearings	Pillow Block	N/A	8.626
NTN LM778549D/LM778510/LM778510DG2 Four Row Bearings	Pillow Block	N/A	6.356
NTN CRO-6426LL Four Row Bearings	Single Row Ball Bearing	N/A	1.385
NTN CRO-5664LL Four Row Bearings	Roller Bearings	N/A	0