NA4922-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 NA4922-XL model number is decoded

envelope 110×150×40 mm: 110 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 20.0 mm radial section packed with small-diameter needle rollers C is 149 kN and C0 290 kN at the 110 mm seat; the C/C0 ratio of 0.51 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 150 mm outside diameter the fatigue load limit Cur is 48 kN, the limiting speed 3,700 r/min and the thermal reference speed 2,330 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 1.35 kN/mm and per millimetre of width 3.73 kN/mm — the reason 40 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 2.07 kg (2070 g), just 0.34 g per mm² of projected 150×40 mm envelope, which keeps unbalanced forces low in fast-actuating linkages with a 110 mm bore this is a heavy-industrial bearing: 2.07 kg of stiff ring and roller set, specified where rigidity matters more than speed The inner ring is separable, so the outer-ring/roller assembly can be pressed into the housing first; the 290 kN C0 rating still assumes full rigid support under both rings The 20.0 mm section still holds a full needle pack; like all needle bearings it cannot tolerate angular misalignment, so shaft and housing axes must be parallel X-life status (-XL) indicates the current Schaeffler premium execution at 110 mm bore; the 290 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include hydraulic and pneumatic pump eccentrics, copying and printing machine mechanisms and agricultural machine pivots and linkages, where the 150 mm outside diameter and 149 kN dynamic rating match the duty. In hydraulic and pneumatic pump eccentrics the unit fits a compact 110 mm seat, and in copying and printing machine mechanisms the 2.07 kg mass is part of the rotor inertia calculation. Designers also specify it for agricultural machine pivots and linkages, relying on the 40 mm width and the published 290 kN static rating. 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.

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.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.
• Adding an IR inner ring changes the envelope logic: the same outer assembly then fits a smaller shaft — recheck bore, clearance and ratings when substituting.