RNA4822-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 RNA4822-XL model number is decoded

envelope 120×140×30 mm: 120 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 106 kN and C0 216 kN at the 120 mm seat; the C/C0 ratio of 0.49 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 140 mm outside diameter the fatigue load limit Cur is 36.5 kN, the limiting speed 3,900 r/min and the thermal reference speed 2,340 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 3.53 kN/mm — the reason 30 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 670 g, just 0.16 g per mm² of projected 140×30 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 120 mm bore belongs to the large band, where HR1 full-complement and track-roller designs deliver their highest kilonewton ratings in slow, heavily loaded machinery The hardness requirement is unforgiving: below about 58 HRC the 120 mm journal brinels under the 216 kN static rating, and roughness above raceway finish accelerates roller wear RNA4822-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 X-life status (-XL) indicates the current Schaeffler premium execution at 120 mm bore; the 216 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include copying and printing machine mechanisms, gearbox selector and change linkages and hydraulic and pneumatic pump eccentrics, where the 140 mm outside diameter and 106 kN dynamic rating match the duty. In copying and printing machine mechanisms the unit fits a compact 120 mm seat, and in gearbox selector and change linkages the 670 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for hydraulic and pneumatic pump eccentrics, relying on the 30 mm width and the published 216 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. On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.

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.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.
• Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.