RNA4834-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 RNA4834-XL model number is decoded

envelope 185×215×45 mm: 185 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 209 kN and C0 510 kN at the 185 mm seat; the C/C0 ratio of 0.41 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 215 mm outside diameter the fatigue load limit Cur is 76 kN, the limiting speed 2,550 r/min and the thermal reference speed 1,640 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 1.13 kN/mm and per millimetre of width 4.64 kN/mm — the reason 45 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 2.54 kg (2540 g), just 0.26 g per mm² of projected 215×45 mm envelope, which keeps unbalanced forces low in fast-actuating linkages 185 mm bore, 215 mm outside diameter: at this size the 510 kN C0 rating and rigid full-complement pack replace multi-bearing arrangements in compact heavy-duty designs Reading the RNA48 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 As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 76 kN Cur value. Typical applications include gearbox selector and change linkages, planetary gear bearings and copying and printing machine mechanisms, where the 215 mm outside diameter and 209 kN dynamic rating match the duty. In gearbox selector and change linkages the unit fits a compact 185 mm seat, and in planetary gear bearings the 2.54 kg mass is part of the rotor inertia calculation. Designers also specify it for copying and printing machine mechanisms, relying on the 45 mm width and the published 510 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. 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

• 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.
• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.
• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.