DOUBLE/FOUR ROW CYLINDRICAL ROLLER BEARINGS

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Description 
ISB double row cylindrical roller bearings are available in two types: NNU and NN. NNU rollers are guided between the flanges of the outer ring, while NN rollers are guided between the integral flanges of the inner ring.
Four row cylindrical roller bearings have less friction than other roller bearings and should be used in cases where high-speed operation is required. They are supplied in FC, FCP and FCDP versions.
 
Advantages
ISB double row cylindrical roller bearings generally have minimal radial dimensions, a strong load capacity and minimal elastic yield. 
ISB four row cylindrical roller bearings are able to withstand a certain degree of axial shaft displacement with respect to the housing.
 
Special technical features
In order to ensure efficient lubrication, double row cylindrical roller bearings have a ring-shaped groove and three or six lubrication holes on the outer ring.
Four row cylindrical roller bearings with cylindrical or tapered hole are produced with a
P6 dimensions precision class and a P5 operating precision class.
 

ISB double and four row cylindrical roller bearings are mainly used in:
* machine tools;
* roll presses;
* industrial gear reducers;
* etc.
 
NNU30, 39, 40, 41, 48
NN30
FC
FCD
FCDP