RNAO35X45X26-ZW-ASR1-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 RNAO35X45X26-ZW-ASR1-XL model number is decoded

envelope 35×45×26 mm: 35 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 5.0 mm radial section packed with small-diameter needle rollers C is 31.5 kN and C0 56 kN at the 35 mm seat; the C/C0 ratio of 0.56 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 45 mm outside diameter the fatigue load limit Cur is 9.1 kN, the limiting speed 13,100 r/min and the thermal reference speed 7,800 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 0.90 kN/mm and per millimetre of width 1.21 kN/mm — the reason 26 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 91 g, just 0.08 g per mm² of projected 45×26 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 35 mm bore places this bearing in the medium band, where the 45 mm envelope already carries ratings in the tens of kilonewtons At 91 g the assembly is easy to drop into a connecting-rod eye, but without ribs even a small axial offset skews the needles — end float must be controlled by the surrounding parts The shaft itself is the inner raceway: harden to 58–64 HRC and finish-grind to the catalogue journal tolerance, or the 56 kN static rating cannot be used The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 13,100 r/min limit. -ZW marks the double-row execution — two offset needle rows in one 35×45 mm ring pair, giving the 31.5 kN C rating in a housing space sized for a wide single bearing. -ASR1 leaves the envelope unchanged but requires a registering groove or port in the housing bore around the 35 mm seat. Typical applications include small electric motor accessory drives, rocker arms and valve trains and planetary gear bearings, where the 45 mm outside diameter and 31.5 kN dynamic rating match the duty. In small electric motor accessory drives the unit fits a compact 35 mm seat, and in rocker arms and valve trains the 91 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for planetary gear bearings, relying on the 26 mm width and the published 56 kN static rating. Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations. 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

• Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.
• 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.