Cylindrical Roller Bearings SKF NN3017 TN9/SPW33

The SKF NN3017 TN9/SPW33 double-row cylindrical roller bearing with an 85 mm bore offers high radial stiffness for play-free idler bearings.

The SKF NN3017 TN9/SPW33 cylindrical roller bearing is designed as a double-row, unshielded bearing. With an 85 mm inner diameter, a 130 mm outer diameter and a width of 34 mm, the bearing can accommodate high radial loads. With tolerance class SP, this version is characterised by tighter dimensional and concentricity tolerances. A polyamide cage guides the two rows of rolling elements at operating temperatures ranging from –30 to +120 degrees.

What is the NN3017 TN9/SPW33 double-row cylindrical roller bearing suitable for?

Typical applications include precision bearing arrangements designed to carry purely radial loads. The NN design allows the outer ring to be removed from both ends, enabling axial shaft displacement to be compensated for within the bearing with minimal friction. The lubrication groove and lubrication holes in the outer ring facilitate direct lubricant supply during operation. Designers prefer to use this combination where precise guidance and high load-carrying capacity under radial loads are required.

What do tolerance class SP and reduced bearing clearance mean for the NN3017?

The SP designation indicates an increased manufacturing precision for the bore, outer diameter and running accuracy compared to the standard specification. In conjunction with the significantly reduced radial bearing clearance, the radial play when the bearing is mounted is considerably reduced. This increases the static and dynamic stiffness of the entire shaft bearing arrangement. As the bearing is of an unsealed design, a customer-supplied seal protects the raceways from contamination.