RNAO30X42X16-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 RNAO30X42X16-XL model number is decoded

envelope 30×42×16 mm: 30 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 6.0 mm radial section packed with small-diameter needle rollers C is 26 kN and C0 33.5 kN at the 30 mm seat; the C/C0 ratio of 0.78 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 42 mm outside diameter the fatigue load limit Cur is 5.6 kN, the limiting speed 14,600 r/min and the thermal reference speed 8,500 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 0.87 kN/mm and per millimetre of width 1.63 kN/mm — the reason 16 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 59 g, just 0.09 g per mm² of projected 42×16 mm envelope, which keeps unbalanced forces low in fast-actuating linkages with a 30 mm bore the 16 mm width and 26 kN C rating suit high-cycle industrial machinery rather than instrument duty RNAO marks the flangeless needle bearing without inner ring: neither race carries ribs, so the 30 mm hardened shaft journal and the housing faces provide all axial guidance At 59 g the assembly is easy to drop into a connecting-rod eye, but without ribs even a small axial offset skews the needles — end float must be controlled by the surrounding parts X-life status (-XL) indicates the current Schaeffler premium execution at 30 mm bore; the 33.5 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include rocker arms and valve trains, two-stroke and compressor piston pins and small electric motor accessory drives, where the 42 mm outside diameter and 26 kN dynamic rating match the duty. In rocker arms and valve trains the unit fits a compact 30 mm seat, and in two-stroke and compressor piston pins the 59 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for small electric motor accessory drives, relying on the 16 mm width and the published 33.5 kN static rating. On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions. Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.

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.
• Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.
• Adding an IR inner ring changes the envelope logic: the same outer assembly then fits a smaller shaft — recheck bore, clearance and ratings when substituting.