RNA4830-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 RNA4830-XL model number is decoded

envelope 165×190×40 mm: 165 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 12.5 mm radial section packed with small-diameter needle rollers C is 172 kN and C0 400 kN at the 165 mm seat; the C/C0 ratio of 0.43 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 190 mm outside diameter the fatigue load limit Cur is 63 kN, the limiting speed 2,850 r/min and the thermal reference speed 1,830 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 1.04 kN/mm and per millimetre of width 4.30 kN/mm — the reason 40 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 1.6 kg (1600 g), just 0.21 g per mm² of projected 190×40 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 165 mm bore puts this execution at the top of the HR1 range — the 190 mm outside diameter, 40 mm width and 1.6 kg mass are built for primary-industry load cases 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 X-life status (-XL) indicates the current Schaeffler premium execution at 165 mm bore; the 400 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include two-stroke and compressor piston pins, motorcycle and light-vehicle transmissions and rocker arms and valve trains, where the 190 mm outside diameter and 172 kN dynamic rating match the duty. In two-stroke and compressor piston pins the unit fits a compact 165 mm seat, and in motorcycle and light-vehicle transmissions the 1.6 kg mass is part of the rotor inertia calculation. Designers also specify it for rocker arms and valve trains, relying on the 40 mm width and the published 400 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. 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

• 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.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.