Four row bearings

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Four-row bearings are used almost exclusively for the roll necks of rolling mill stands, calenders and roller presses. Because they are normally mounted with an interference fit on the roll neck, four-row cylindrical roller bearings are well suited for rolling mill applications where the rolling speed is high.

Because four-row bearings can accommodate only radial loads, they are mounted together with deep groove or angular contact ball bearings, or with tapered roller bearings (either radial or thrust design) which accommodate the axial loads.

There are a variety of special features that can be incorporated in the design of four row bearings, such as: face notches, helical bore grooves, extended .Four-row bearings are used successfully worldwide for rolling mill bearing arrangements, particularly as work and back-up roll bearings for hot as well as cold rolling mills. As they can support both heavy radial loads and simultaneously acting axial loads they permit simple and cost effective roll neck bearing arrangements.

 

Bearing Number Bore Dia Outer DIa Width Size
NSK 6207du Bearing 420 NNU3056C1NAP4 420 mm NTN
LM654644D/LM654610/LM654610D Four row bearings 11,1 mm KOYO 11,1 16.6
EE129119D/129174/129175D Four row bearings 140 mm 42 mm ISO 6228 ZZ
1250TQO1550-1 Four row bearings 260x170x90 0.097 170 9 mm
EE700090D/700167/700168D Four row bearings 66 32 mm 32 mm 35
M281649D/M281610/M281610D Four row bearings 2 mm 436 mm 440 mm 434 mm
438TQO580-1 Four row bearings 120 7 mm 8x22x7 7
317TQO438A-1 Four row bearings 57,945 mm 57,945 292,1 T-M241543/M241510
460TQO590-1 Four row bearings 78 mm 57 44 mm 57 mm
381096 Four row bearings 1700 r/min 45 mm KOYO 10 mm
406TQO546A-2 Four row bearings 32 mm 20 Needle Non Thrust Ro 42
340TQO420-1 Four row bearings 6 mm 35 5/1624UNF 0,83 Kg
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