NA4913-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 NA4913-XL model number is decoded

envelope 65×90×25 mm: 65 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 12.5 mm radial section packed with small-diameter needle rollers C is 69 kN and C0 112 kN at the 65 mm seat; the C/C0 ratio of 0.62 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 90 mm outside diameter the fatigue load limit Cur is 19.9 kN, the limiting speed 6,300 r/min and the thermal reference speed 3,500 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 1.06 kN/mm and per millimetre of width 2.76 kN/mm — the reason 25 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 456 g, just 0.20 g per mm² of projected 90×25 mm envelope, which keeps unbalanced forces low in fast-actuating linkages with a 65 mm bore this is a heavy-industrial bearing: 456 g of stiff ring and roller set, specified where rigidity matters more than speed Reading the NA49 prefix: machined-ring needle bearing with inner ring, one roller row, capable of pure radial load at 69 kN C NA4913-XL is supplied with a machined inner ring, so it mounts on an ordinary turned and ground shaft of normal tolerance — hardening the journal is not required X-life status (-XL) indicates the current Schaeffler premium execution at 65 mm bore; the 112 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include textile machine heald and cam shafts, agricultural machine pivots and linkages and connecting-rod small ends, where the 90 mm outside diameter and 69 kN dynamic rating match the duty. In textile machine heald and cam shafts the unit fits a compact 65 mm seat, and in agricultural machine pivots and linkages the 456 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for connecting-rod small ends, relying on the 25 mm width and the published 112 kN static rating. Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately. Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.

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.
• 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.