RNA4913-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 RNA4913-XL model number is decoded

envelope 72×90×25 mm: 72 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 9.0 mm radial section packed with small-diameter needle rollers C is 69 kN and C0 112 kN at the 72 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 3,650 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 0.96 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 312 g, just 0.14 g per mm² of projected 90×25 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 72 mm bore belongs to the large band, where HR1 full-complement and track-roller designs deliver their highest kilonewton ratings in slow, heavily loaded machinery Reading the RNA49 prefix: a machined (not drawn-cup) outer ring with the needle complement; an inner ring from the IR series can be added later if the shaft cannot be hardened RNA4913-XL has no inner ring: the needle rollers run directly on the shaft journal, so the seat must be hardened (58–64 HRC) and ground to bearing raceway quality -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 69 kN C rating and longer nominal life come without an envelope change. Typical applications include small electric motor accessory drives, rocker arms and valve trains and planetary gear bearings, where the 90 mm outside diameter and 69 kN dynamic rating match the duty. In small electric motor accessory drives the unit fits a compact 72 mm seat, and in rocker arms and valve trains the 312 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for planetary gear bearings, 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.