NA4834-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 NA4834-XL model number is decoded

envelope 170×215×45 mm: 170 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 22.5 mm radial section packed with small-diameter needle rollers C is 209 kN and C0 510 kN at the 170 mm seat; the C/C0 ratio of 0.41 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 215 mm outside diameter the fatigue load limit Cur is 76 kN, the limiting speed 2,550 r/min and the thermal reference speed 1,610 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 1.23 kN/mm and per millimetre of width 4.64 kN/mm — the reason 45 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 3.96 kg (3960 g), just 0.41 g per mm² of projected 215×45 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 170 mm bore puts this execution at the top of the HR1 range — the 215 mm outside diameter, 45 mm width and 3.96 kg mass are built for primary-industry load cases This is the choice for OEM production on soft shafts: machine the 170 mm seat to the recommended tolerance, fit the bearing, and let the inner ring provide the precision raceway The 22.5 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 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 170×215×45 mm envelope. Typical applications include copying and printing machine mechanisms, gearbox selector and change linkages and hydraulic and pneumatic pump eccentrics, where the 215 mm outside diameter and 209 kN dynamic rating match the duty. In copying and printing machine mechanisms the unit fits a compact 170 mm seat, and in gearbox selector and change linkages the 3.96 kg mass is part of the rotor inertia calculation. Designers also specify it for hydraulic and pneumatic pump eccentrics, relying on the 45 mm width and the published 510 kN static rating. Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone. 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

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