NA4848-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 NA4848-XL model number is decoded

envelope 240×300×60 mm: 240 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 400 kN and C0 1080 kN at the 240 mm seat; the C/C0 ratio of 0.37 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 300 mm outside diameter the fatigue load limit Cur is 153 kN, the limiting speed 1,780 r/min and the thermal reference speed 960 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 1.67 kN/mm and per millimetre of width 6.67 kN/mm — the reason 60 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 10 kg (10000 g), just 0.56 g per mm² of projected 300×60 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 240 mm bore puts this execution at the top of the HR1 range — the 300 mm outside diameter, 60 mm width and 10 kg mass are built for primary-industry load cases Reading the NA48 prefix: machined-ring needle bearing with inner ring, one roller row, capable of pure radial load at 400 kN C X-life status (-XL) indicates the current Schaeffler premium execution at 240 mm bore; the 1080 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include gearbox selector and change linkages, planetary gear bearings and copying and printing machine mechanisms, where the 300 mm outside diameter and 400 kN dynamic rating match the duty. In gearbox selector and change linkages the unit fits a compact 240 mm seat, and in planetary gear bearings the 10 kg mass is part of the rotor inertia calculation. Designers also specify it for copying and printing machine mechanisms, relying on the 60 mm width and the published 1080 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. Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.

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.
• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.
• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.