NA49-22-XL bearing: complete specifications & equivalents

Specification table

Source: catalog reference (HR1 2026-09-25) · extracted 2026-09-30

Parameters extracted from the official FAG Rolling Bearings catalogue (HR1 2026-09-25); FAG® is a trademark of Schaeffler Technologies AG & Co. KG, used here for identification only — mpnbase is not an authorized FAG/Schaeffler distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at schaeffler.com.

Cross references & equivalents

Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the NA49-22-XL model number is decoded

envelope 22×39×17 mm: 22 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 8.5 mm radial section packed with small-diameter needle rollers C is 26 kN and C0 29.5 kN at the 22 mm seat; the C/C0 ratio of 0.88 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 39 mm outside diameter the fatigue load limit Cur is 5.4 kN, the limiting speed 15,300 r/min and the thermal reference speed 8,100 r/min; for small needle bearings the reference speed can exceed the kinematic limit, so the lower of the two governs the application dynamic capacity per millimetre of bore is 1.18 kN/mm and per millimetre of width 1.53 kN/mm — the reason 17 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 80 g, just 0.12 g per mm² of projected 39×17 mm envelope, which keeps unbalanced forces low in fast-actuating linkages with a 22 mm bore the 17 mm width and 26 kN C rating suit high-cycle industrial machinery rather than instrument duty Cur 5.4 kN, limiting speed 15,300 r/min, reference speed 8,100 r/min — the inner ring adds a few grams (total 80 g) but removes the hardening requirement The integral inner ring brings the bore to 22 mm inside the 39×17 mm envelope; removing that ring gives the corresponding RNA/NK execution and a larger shaft for the same housing The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 22×39×17 mm envelope. Typical applications include copying and printing machine mechanisms, gearbox selector and change linkages and hydraulic and pneumatic pump eccentrics, where the 39 mm outside diameter and 26 kN dynamic rating match the duty. In copying and printing machine mechanisms the unit fits a compact 22 mm seat, and in gearbox selector and change linkages the 80 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for hydraulic and pneumatic pump eccentrics, relying on the 17 mm width and the published 29.5 kN static rating. Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO. Do not press an RNA/NK assembly in through the outer ring when mounting it on a shaft, and vice versa — rolling forces through the wrong ring bruises the raceways.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO.
• Do not press an RNA/NK assembly in through the outer ring when mounting it on a shaft, and vice versa — rolling forces through the wrong ring bruises the raceways.
• Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.