RNA4928-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 RNA4928-XL model number is decoded

envelope 160×190×50 mm: 160 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 15.0 mm radial section packed with small-diameter needle rollers C is 237 kN and C0 500 kN at the 160 mm seat; the C/C0 ratio of 0.47 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 190 mm outside diameter the fatigue load limit Cur is 79 kN, the limiting speed 2,900 r/min and the thermal reference speed 1,910 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 1.48 kN/mm and per millimetre of width 4.74 kN/mm — the reason 50 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 2.35 kg (2350 g), just 0.25 g per mm² of projected 190×50 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 160 mm bore puts this execution at the top of the HR1 range — the 190 mm outside diameter, 50 mm width and 2.35 kg mass are built for primary-industry load cases Reading the RNA49 prefix: a machined (not drawn-cup) outer ring with the needle complement; an inner ring from the IR series can be added later if the shaft cannot be hardened RNA4928-XL has no inner ring: the needle rollers run directly on the shaft journal, so the seat must be hardened (58–64 HRC) and ground to bearing raceway quality X-life status (-XL) indicates the current Schaeffler premium execution at 160 mm bore; the 500 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include textile machine heald and cam shafts, agricultural machine pivots and linkages and connecting-rod small ends, where the 190 mm outside diameter and 237 kN dynamic rating match the duty. In textile machine heald and cam shafts the unit fits a compact 160 mm seat, and in agricultural machine pivots and linkages the 2.35 kg mass is part of the rotor inertia calculation. Designers also specify it for connecting-rod small ends, relying on the 50 mm width and the published 500 kN static rating. Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately. 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

• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.
• Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.