RNA4826-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 RNA4826-XL model number is decoded

envelope 145×165×35 mm: 145 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 134 kN and C0 310 kN at the 145 mm seat; the C/C0 ratio of 0.43 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 165 mm outside diameter the fatigue load limit Cur is 49.5 kN, the limiting speed 3,250 r/min and the thermal reference speed 2,000 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 0.92 kN/mm and per millimetre of width 3.83 kN/mm — the reason 35 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 990 g, just 0.17 g per mm² of projected 165×35 mm envelope, which keeps unbalanced forces low in fast-actuating linkages 145 mm bore, 165 mm outside diameter: at this size the 310 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 Omitting the inner ring frees radial space — at a 145 mm shaft the outer diameter is only 165 mm and the width 35 mm, yet C is 134 kN As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 49.5 kN Cur value. Typical applications include connecting-rod small ends, textile machine heald and cam shafts and motorcycle and light-vehicle transmissions, where the 165 mm outside diameter and 134 kN dynamic rating match the duty. In connecting-rod small ends the unit fits a compact 145 mm seat, and in textile machine heald and cam shafts the 990 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for motorcycle and light-vehicle transmissions, relying on the 35 mm width and the published 310 kN static rating. Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO.
• 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.