RNA4864-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 RNA4864-XL model number is decoded

envelope 350×400×80 mm: 350 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 25.0 mm radial section packed with small-diameter needle rollers C is 710 kN and C0 1850 kN at the 350 mm seat; the C/C0 ratio of 0.38 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 400 mm outside diameter the fatigue load limit Cur is 246 kN, the limiting speed 1,340 r/min and the thermal reference speed 680 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 2.03 kN/mm and per millimetre of width 8.88 kN/mm — the reason 80 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 13.4 kg (13400 g), just 0.42 g per mm² of projected 400×80 mm envelope, which keeps unbalanced forces low in fast-actuating linkages 350 mm bore, 400 mm outside diameter: at this size the 1850 kN C0 rating and rigid full-complement pack replace multi-bearing arrangements in compact heavy-duty designs RNA4864-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 With Cur 246 kN and a 1,340 r/min limiting speed the unit suits pivots, rocker arms, pumps and compact gear trains running on hardened pins The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 350×400×80 mm envelope. Typical applications include gearbox selector and change linkages, planetary gear bearings and copying and printing machine mechanisms, where the 400 mm outside diameter and 710 kN dynamic rating match the duty. In gearbox selector and change linkages the unit fits a compact 350 mm seat, and in planetary gear bearings the 13.4 kg mass is part of the rotor inertia calculation. Designers also specify it for copying and printing machine mechanisms, relying on the 80 mm width and the published 1850 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.
• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.