RNA4828-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 RNA4828-XL model number is decoded

envelope 155×175×35 mm: 155 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 10.0 mm radial section packed with small-diameter needle rollers C is 136 kN and C0 325 kN at the 155 mm seat; the C/C0 ratio of 0.42 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 175 mm outside diameter the fatigue load limit Cur is 51 kN, the limiting speed 3,050 r/min and the thermal reference speed 1,870 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 0.88 kN/mm and per millimetre of width 3.89 kN/mm — the reason 35 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 1.05 kg (1050 g), just 0.17 g per mm² of projected 175×35 mm envelope, which keeps unbalanced forces low in fast-actuating linkages 155 mm bore, 175 mm outside diameter: at this size the 325 kN C0 rating and rigid full-complement pack replace multi-bearing arrangements in compact heavy-duty designs This bearing accepts axial displacement between shaft and housing because the rollers rotate on the free journal; it locates nothing axially and must be flanked by guide faces -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 136 kN C rating and longer nominal life come without an envelope change. Typical applications include textile machine heald and cam shafts, agricultural machine pivots and linkages and connecting-rod small ends, where the 175 mm outside diameter and 136 kN dynamic rating match the duty. In textile machine heald and cam shafts the unit fits a compact 155 mm seat, and in agricultural machine pivots and linkages the 1.05 kg mass is part of the rotor inertia calculation. Designers also specify it for connecting-rod small ends, relying on the 35 mm width and the published 325 kN static rating. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.