NK110-30-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 NK110-30-XL model number is decoded

envelope 110×130×30 mm: 110 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 10.0 mm radial section packed with small-diameter needle rollers C is 111 kN and C0 210 kN at the 110 mm seat; the C/C0 ratio of 0.53 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 130 mm outside diameter the fatigue load limit Cur is 36 kN, the limiting speed 4,200 r/min and the thermal reference speed 2,800 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 1.01 kN/mm and per millimetre of width 3.70 kN/mm — the reason 30 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 650 g, just 0.17 g per mm² of projected 130×30 mm envelope, which keeps unbalanced forces low in fast-actuating linkages at 110 mm bore the 130 mm outside diameter and 30 mm width target rolling stands, construction machinery and heavy gearboxes; the limiting speed drops to 4,200 r/min The thin 10.0 mm section makes the 650 g bearing sensitive to seat geometry — a tapered or lobed journal preloads part of the needle set and shows up as local pitting Omitting the inner ring frees radial space — at a 110 mm shaft the outer diameter is only 130 mm and the width 30 mm, yet C is 111 kN X-life status (-XL) indicates the current Schaeffler premium execution at 110 mm bore; the 210 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include gearbox selector and change linkages, planetary gear bearings and copying and printing machine mechanisms, where the 130 mm outside diameter and 111 kN dynamic rating match the duty. In gearbox selector and change linkages the unit fits a compact 110 mm seat, and in planetary gear bearings the 650 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for copying and printing machine mechanisms, relying on the 30 mm width and the published 210 kN static rating. 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. Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

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