INANA6913Needle Roller Bearing – Machined Ring with Inner Ring, 65 mm ID, 90 mm OD, 45 mm Width, Open, Double Row.

Product Description

What this part is

INA NA6913 needle roller bearing with machined rings and an inner ring. Bore 65 mm, outside diameter 90 mm, width 45 mm. Double row of needle rollers on a machined steel cage, open on both faces, straight bore.

Decoding the designation

NA marks the machined-ring needle roller bearing supplied with its own inner ring. The RNA form of the same bearing is furnished without the inner ring, for use directly on a hardened and ground shaft. 69 is the dimension series and 13 is the bore code, giving the 65 mm bore.

What these specs mean in practice

A needle complement puts far more rolling-element length into a given section height than a ball bearing of the same envelope, so radial capacity is high in a narrow radial space. Load ratings are 93 kN dynamic and 166 kN static. Limiting speed 4800 rpm. This is a purely radial design — the rollers run between cylindrical raceways and carry no axial load.

Closure and lubrication

Open on both faces, with no lip seals or shields. Sealing and grease retention are provided by the surrounding housing. Operating range −30 °C to 120 °C.

Quantity and configuration

1 Pc. Complete bearing, inner ring included.

Mounting data

The machined outer ring is dimensioned for a bored housing seat and the inner ring for a straight shaft seat. The two rings are separable.

Interchange guidance

SKF NA 6913 is the same ISO designation and the same envelope. RNA6913 shares the outside diameter and width but has no inner ring and a larger internal diameter, so it is a related part rather than a substitution.