NAO70X100X30-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 NAO70X100X30-XL model number is decoded

envelope 70×100×30 mm: 70 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 15.0 mm radial section packed with small-diameter needle rollers C is 80 kN and C0 176 kN at the 70 mm seat; the C/C0 ratio of 0.45 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 100 mm outside diameter the fatigue load limit Cur is 31.5 kN, the limiting speed 5,800 r/min and the thermal reference speed 3,350 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 1.14 kN/mm and per millimetre of width 2.67 kN/mm — the reason 30 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 850 g, just 0.28 g per mm² of projected 100×30 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 70 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 The inner ring gives a 70 mm plain bore inside the 100×30 mm envelope and the flangeless pack delivers C 80 kN — a frequent choice in gear change linkages and pumps Because neither ring guides axially, housing and shaft shoulders position the races; uncontrolled end float lets the rollers run off the raceway edges The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 70×100×30 mm envelope. Typical applications include hydraulic and pneumatic pump eccentrics, copying and printing machine mechanisms and agricultural machine pivots and linkages, where the 100 mm outside diameter and 80 kN dynamic rating match the duty. In hydraulic and pneumatic pump eccentrics the unit fits a compact 70 mm seat, and in copying and printing machine mechanisms the 850 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for agricultural machine pivots and linkages, relying on the 30 mm width and the published 176 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. Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.

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.
• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.
• Do not press an RNA/NK assembly in through the outer ring when mounting it on a shaft, and vice versa — rolling forces through the wrong ring bruises the raceways.