NA4826-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 NA4826-XL model number is decoded

envelope 130×165×35 mm: 130 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 17.5 mm radial section packed with small-diameter needle rollers C is 134 kN and C0 310 kN at the 130 mm seat; the C/C0 ratio of 0.43 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 165 mm outside diameter the fatigue load limit Cur is 49.5 kN, the limiting speed 3,250 r/min and the thermal reference speed 1,930 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 1.03 kN/mm and per millimetre of width 3.83 kN/mm — the reason 35 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 1.81 kg (1810 g), just 0.31 g per mm² of projected 165×35 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 130 mm bore puts this execution at the top of the HR1 range — the 165 mm outside diameter, 35 mm width and 1.81 kg mass are built for primary-industry load cases The 17.5 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 Cur 49.5 kN, limiting speed 3,250 r/min, reference speed 1,930 r/min — the inner ring adds a few grams (total 1810 g) but removes the hardening requirement The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 130×165×35 mm envelope. Typical applications include motorcycle and light-vehicle transmissions, connecting-rod small ends and two-stroke and compressor piston pins, where the 165 mm outside diameter and 134 kN dynamic rating match the duty. In motorcycle and light-vehicle transmissions the unit fits a compact 130 mm seat, and in connecting-rod small ends the 1.81 kg mass is part of the rotor inertia calculation. Designers also specify it for two-stroke and compressor piston pins, relying on the 35 mm width and the published 310 kN static rating. Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.
• 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.
• 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.