NAO15X28X13-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 NAO15X28X13-XL model number is decoded

envelope 15×28×13 mm: 15 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 6.5 mm radial section packed with small-diameter needle rollers C is 11.1 kN and C0 14.3 kN at the 15 mm seat; the C/C0 ratio of 0.78 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 28 mm outside diameter the fatigue load limit Cur is 2.35 kN, the limiting speed 21,300 r/min and the thermal reference speed 12,100 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 0.74 kN/mm and per millimetre of width 0.85 kN/mm — the reason 13 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 29 g, just 0.08 g per mm² of projected 28×13 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 15 mm bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading NAO: the O-suffix race design has no integral ribs on either ring, so the bearing can be separated and the outer assembly swivelled into split housings during mounting With the inner ring fitted the shaft seat stays at normal bearing-shaft tolerance; C0 is 14.3 kN and Cur 2.35 kN for the 29 g unit The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 21,300 r/min limit. Typical applications include agricultural machine pivots and linkages, hydraulic and pneumatic pump eccentrics and textile machine heald and cam shafts, where the 28 mm outside diameter and 11.1 kN dynamic rating match the duty. In agricultural machine pivots and linkages the unit fits a compact 15 mm seat, and in hydraulic and pneumatic pump eccentrics the 29 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for textile machine heald and cam shafts, relying on the 13 mm width and the published 14.3 kN static rating. Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone. Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.
• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.