RNAO30X42X32-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 RNAO30X42X32-ZW-ASR1-XL model number is decoded

envelope 30×42×32 mm: 30 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 6.0 mm radial section packed with small-diameter needle rollers C is 45 kN and C0 67 kN at the 30 mm seat; the C/C0 ratio of 0.67 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 42 mm outside diameter the fatigue load limit Cur is 11.3 kN, the limiting speed 14,600 r/min and the thermal reference speed 8,500 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 1.50 kN/mm and per millimetre of width 1.41 kN/mm — the reason 32 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 137 g, just 0.10 g per mm² of projected 42×32 mm envelope, which keeps unbalanced forces low in fast-actuating linkages at 30 mm bore this size balances the 42 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The shaft itself is the inner raceway: harden to 58–64 HRC and finish-grind to the catalogue journal tolerance, or the 67 kN static rating cannot be used At 137 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 X-life status (-XL) indicates the current Schaeffler premium execution at 30 mm bore; the 67 kN C0 rating reflects the improved rolling-contact geometry. The -ZW suffix denotes a double-row (zweireihig) needle roller and cage assembly: two roller rows share the 32 mm-wide envelope for higher capacity at the same bore. The ASR groove is particularly useful on double-row -ZW executions, feeding both rows evenly across the 42 mm outer ring. Typical applications include agricultural machine pivots and linkages, hydraulic and pneumatic pump eccentrics and textile machine heald and cam shafts, where the 42 mm outside diameter and 45 kN dynamic rating match the duty. In agricultural machine pivots and linkages the unit fits a compact 30 mm seat, and in hydraulic and pneumatic pump eccentrics the 137 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for textile machine heald and cam shafts, relying on the 32 mm width and the published 67 kN static rating. Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO. Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO.
• 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.