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Fow Row Cylindrical Roller Bearings

 Fow Row Cylindrical Roller Bearings Cylindrical roller bearings with four rows of rollers are used almost exclusively for rolling mills. They have lower friction than other roller bearings and can be successfully used where high speed operation is called for. The low cross-sectional height of...

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Fow Row Cylindrical Roller Bearings

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Cylindrical roller bearings with four rows of rollers are used almost exclusively for rolling mills. They have lower friction than other roller bearings and can be successfully used where high speed operation is called for. The low cross-sectional height of cylindrical roller bearings means that the roll necks can have a large diameter in relation to the roll itself. 

In four-row cylindrical roller bearings, the rollers are guided between integral or non-integral flanges on the outer ring. The inner ring is without flanges; axial displacement of the shaft with respect to the housing can therefore be accommodated by the bearing within certain limits. 

Depending on the application, four-row cylindrical roller bearings can be supplied with a cylindrical bore or a tapered bore. The inner and outer rings may be in one piece or in more than one piece. 

Dimensions 

The dimensions of the bearings with series designations listed in the tables conform to ISO15-1981. 

Misalignment 

Four-row cylindrical roller bearings are not designed to accommodate any misalignment. 

Tolerances 

Excluding particular request of customers the four row cylindrical roller bearings with cylindrical bore or tapered bore have a dimensional accuracy corresponding to tolerance class P6 and a running accuracy to tolerance class P5. 

Radial internal clearance 

Four row cylindrical roller bearings with cylindrical and tapered bore, are produced with C3 or C4 radial internal clearance. One customer’s requests are available bearings with different radial internal clearances. All cylindrical roller bearings that presented helical groove on the inner ring bore are made with C2 radial internal clearance. 

Cages 

In relation to the execution four row cylindrical roller bearings are fitted with either two double-pronged machined roller guided cages of brass or steel, pin-type cages of steel(with pierced roller) or machined cages of brass with vent-hole. Some execution are supplied with steel pressed sheet. 

Heat treatment 

With some special exceptions four row cylindrical roller bearings undergo special stabilizing treatment S0 which makes them suitable for operating temperatures up to +150℃. On customer’s request it’s possible to have other stabilizing treatment as: S1(use up to +200℃) S2(use up to +250℃)


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♥ 6. OEM is available.

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