RNA4926-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 RNA4926-XL model number is decoded

envelope 150×180×50 mm: 150 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 229 kN and C0 470 kN at the 150 mm seat; the C/C0 ratio of 0.49 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 180 mm outside diameter the fatigue load limit Cur is 76 kN, the limiting speed 3,100 r/min and the thermal reference speed 2,080 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 1.53 kN/mm and per millimetre of width 4.58 kN/mm — the reason 50 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 2.21 kg (2210 g), just 0.25 g per mm² of projected 180×50 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 150 mm bore puts this execution at the top of the HR1 range — the 180 mm outside diameter, 50 mm width and 2.21 kg mass are built for primary-industry load cases RNA4926-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 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 The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 3,100 r/min limit. Typical applications include connecting-rod small ends, textile machine heald and cam shafts and motorcycle and light-vehicle transmissions, where the 180 mm outside diameter and 229 kN dynamic rating match the duty. In connecting-rod small ends the unit fits a compact 150 mm seat, and in textile machine heald and cam shafts the 2.21 kg mass is part of the rotor inertia calculation. Designers also specify it for motorcycle and light-vehicle transmissions, relying on the 50 mm width and the published 470 kN static rating. 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. 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

• 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.
• Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.
• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.