RNAO5X10X8-TV-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 RNAO5X10X8-TV-XL model number is decoded

envelope 5×10×8 mm: 5 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 2.5 mm radial section packed with small-diameter needle rollers C is 2.65 kN and C0 1.92 kN at the 5 mm seat; the C/C0 ratio of 1.38 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 10 mm outside diameter the fatigue load limit Cur is 0.3 kN, the limiting speed 39,000 r/min and the thermal reference speed 53,000 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 0.53 kN/mm and per millimetre of width 0.33 kN/mm — the reason 8 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 3 g, just 0.04 g per mm² of projected 10×8 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 5 mm bore sits in the miniature band; at 8 mm wide the RNAO5×10×8-TV-XL is built into compact cam drives, indexing pawls and light linkages Flangeless races make this bearing purely radial — adjacent thrust washers or shoulders must locate the assembly axially and keep the rollers from walking off the journal RNAO marks the flangeless needle bearing without inner ring: neither race carries ribs, so the 5 mm hardened shaft journal and the housing faces provide all axial guidance As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 0.3 kN Cur value. -TV denotes the PA66 cage: light, quiet and self-lubricating in dry-running moments, but limited by the polymer's continuous-temperature ceiling well below the ring steel's. Typical applications include rocker arms and valve trains, two-stroke and compressor piston pins and small electric motor accessory drives, where the 10 mm outside diameter and 2.65 kN dynamic rating match the duty. In rocker arms and valve trains the unit fits a compact 5 mm seat, and in two-stroke and compressor piston pins the 3 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for small electric motor accessory drives, relying on the 8 mm width and the published 1.92 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. On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.

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.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.
• Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.