NA69-28-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 NA69-28-XL model number is decoded

envelope 28×45×30 mm: 28 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 45.5 kN and C0 63 kN at the 28 mm seat; the C/C0 ratio of 0.72 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 45 mm outside diameter the fatigue load limit Cur is 11.6 kN, the limiting speed 13,600 r/min and the thermal reference speed 7,100 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 1.63 kN/mm and per millimetre of width 1.52 kN/mm — the reason 30 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 182 g, just 0.13 g per mm² of projected 45×30 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 28 mm bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty This is the choice for OEM production on soft shafts: machine the 28 mm seat to the recommended tolerance, fit the bearing, and let the inner ring provide the precision raceway Cur 11.6 kN, limiting speed 13,600 r/min, reference speed 7,100 r/min — the inner ring adds a few grams (total 182 g) but removes the hardening requirement -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 45.5 kN C rating and longer nominal life come without an envelope change. Typical applications include small electric motor accessory drives, rocker arms and valve trains and planetary gear bearings, where the 45 mm outside diameter and 45.5 kN dynamic rating match the duty. In small electric motor accessory drives the unit fits a compact 28 mm seat, and in rocker arms and valve trains the 182 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for planetary gear bearings, relying on the 30 mm width and the published 63 kN static rating. On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions. Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.
• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.
• 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.