NA4852-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 NA4852-XL model number is decoded

envelope 260×320×60 mm: 260 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 30.0 mm radial section packed with small-diameter needle rollers C is 415 kN and C0 1160 kN at the 260 mm seat; the C/C0 ratio of 0.36 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 320 mm outside diameter the fatigue load limit Cur is 161 kN, the limiting speed 1,660 r/min and the thermal reference speed 870 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 1.60 kN/mm and per millimetre of width 6.92 kN/mm — the reason 60 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 10.6 kg (10600 g), just 0.55 g per mm² of projected 320×60 mm envelope, which keeps unbalanced forces low in fast-actuating linkages at 260 mm bore this is among the largest catalogue sizes; the 1,660 r/min limiting speed confirms a slow-speed, extreme-load application such as a slewing or rolling-mill position Cur 161 kN, limiting speed 1,660 r/min, reference speed 870 r/min — the inner ring adds a few grams (total 10600 g) but removes the hardening requirement NA4852-XL is supplied with a machined inner ring, so it mounts on an ordinary turned and ground shaft of normal tolerance — hardening the journal is not required 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 1,660 r/min limit. Typical applications include hydraulic and pneumatic pump eccentrics, copying and printing machine mechanisms and agricultural machine pivots and linkages, where the 320 mm outside diameter and 415 kN dynamic rating match the duty. In hydraulic and pneumatic pump eccentrics the unit fits a compact 260 mm seat, and in copying and printing machine mechanisms the 10.6 kg mass is part of the rotor inertia calculation. Designers also specify it for agricultural machine pivots and linkages, relying on the 60 mm width and the published 1160 kN static rating. Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations. 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

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