NK24-16-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 NK24-16-XL model number is decoded

envelope 24×32×16 mm: 24 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 4.0 mm radial section packed with small-diameter needle rollers C is 16.9 kN and C0 22.3 kN at the 24 mm seat; the C/C0 ratio of 0.76 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 32 mm outside diameter the fatigue load limit Cur is 4.2 kN, the limiting speed 18,500 r/min and the thermal reference speed 11,000 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 0.70 kN/mm and per millimetre of width 1.06 kN/mm — the reason 16 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 31.9 g, just 0.06 g per mm² of projected 32×16 mm envelope, which keeps unbalanced forces low in fast-actuating linkages at 24 mm bore this size balances the 32 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range With Cur 4.2 kN and a 18,500 r/min limiting speed the unit suits pivots, rocker arms, pumps and compact gear trains running on hardened pins Omitting the inner ring frees radial space — at a 24 mm shaft the outer diameter is only 32 mm and the width 16 mm, yet C is 16.9 kN X-life status (-XL) indicates the current Schaeffler premium execution at 24 mm bore; the 22.3 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include rocker arms and valve trains, two-stroke and compressor piston pins and small electric motor accessory drives, where the 32 mm outside diameter and 16.9 kN dynamic rating match the duty. In rocker arms and valve trains the unit fits a compact 24 mm seat, and in two-stroke and compressor piston pins the 31.9 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for small electric motor accessory drives, relying on the 16 mm width and the published 22.3 kN static rating. Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations. Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.

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.
• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.
• Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO.