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Z-565250.TR4


Dimensions
Bore diameter d 749.3 mm
Outside diameter D 1066.8 mm
Total bearing width over outer rings T 736.6 mm
Total bearing width over inner rings B 723.9 mm
Abutment diameter shaft d1 ≈ - mm
Abutment diameter housing D1 ≈ mm
Inner ring radius (chamfer) r1,2 min. 25.4X20° mm
Outer ring radius (chamfer) r3,4 min. 9.7 mm

Calculation data
Basic dynamic load rating C 22200 kN
Basic static load rating Co 49500 kN
Fatigue load limit Pu 3750 kN
Calculation factor
e
0.35
Y1
1.95
Y2
2.9

Weight
Application
Interchange
Mass: 2190 Kg ROLLING MILL FAG(schaeffler)

Four-row tapered roller bearing Z-565250.TR4 (749.3,x1066.8x723.9/736.6mm) is a popular bearing for rolling mill plant. FV is a well-known manufacturer of rolling mill bearings . For more technical details and bearing quotation, please contact our sales manager.


FV brand Four-row tapered roller bearings

Features 

Four-row tapered roller bearings comprise solid bearing rings and tapered roller and cage assemblies. They are suitable for axial loads in both directions and high radial loads.

The bearings described here are separable. The complete bearing must be mounted in the chock, after which the chock together with the bearing is slid onto the journal. This requires a loose fit for the inner ring on the journal.

For high speeds and loads, however, the inner ring must have a tight fit. This can be achieved by mounting bearings with a tapered bore on tapered roll journals.

Four-row tapered roller bearings are normally supplied with spacer rings between the outer rings while, in a few cases, they do not have intermediate rings.

Four-row tapered roller bearings are used, for example, in bearing arrangements for work rolls (bearings with sheet metal cage) or back-up rolls (bearings with pin cage). In addition to open bearings, sealed designs are also available. They are used to reduce the grease consumption in work roll bearings.

Four-row tapered roller bearings have non-standardised metric or inch dimensions and designations Z-5..TR4 or F-8..TR4.

Design variants are indicated by the Technical Specification H122**. 


Radial and axial load capacity 

Four-row tapered roller bearings can support axial forces in both directions as well as high radial forces. Where there are particularly high demands on axial guidance, an additional axial bearing is used in some cases.

Sealed, Four-row tapered roller bearings 

Work roll bearing arrangements in hot or cold rolling lines must be effectively sealed against large quantities of water or roll coolant that are mixed with contaminants.

These bearing arrangements are normally lubricated with grease.

For cost and environmental reasons, it is desirable to achieve low levels of grease consumption. Four-row tapered roller bearings with integrated seals have therefore been developed.

These bearings have main dimensions identical to those of the open bearings. Only small quantities of the high quality rolling bearing grease used are required.

Although the basic load ratings of the sealed bearings are lower, they normally have a longer life than the open bearings due to the improved cleanliness in the lubrication gap.


Tolerances and clearances: ISO standard, Perfect interchange

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