Cylindrical Roller Bearings SKF N213 ECP

In the N design, the inner ring guides the cylindrical rollers between two fixed flanges, whilst the outer ring has no flanges. This allows the outer ring to be pulled out axially from both ends. The component thus acts purely as a non-locating bearing, which accommodates the thermal expansion of the rotating shaft axially during operation.

This roller bearing combines two tolerance classes: The dimensional accuracy for the bore, outer diameter and width complies with the standard tolerance P0 or ABEC 1. For concentricity and running accuracy, however, the tighter tolerance class P6 (corresponding to ABEC 3) applies, which contributes to smooth rotational behaviour during operation.

The N213 ECP cylindrical roller bearing is designed for an operating temperature range of -30 to +120 degrees Celsius. This range is largely determined by the polyamide cage fitted. When selecting lubricants for this open bearing, the greases or oils chosen must be suitable for this temperature range.

As the bearing is designed without integrated seals and the outer ring has no lubrication bore, lubrication must be provided via the adjacent structure. Lubricating oil or rolling-element bearing grease is introduced from the end faces. At the same time, external seals are required in the surrounding housing to keep contaminants away from the raceways.

The standard radial bearing clearance refers to the factory-set movement between the rollers and raceways when the bearing is unmounted. This standard range ensures that, once the bearing rings have been pressed onto the shaft and housing, the required operating clearance for even load distribution is maintained.