NKIS35-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 NKIS35-XL model number is decoded

envelope 35×58×22 mm: 35 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 11.5 mm radial section packed with small-diameter needle rollers C is 44 kN and C0 57 kN at the 35 mm seat; the C/C0 ratio of 0.77 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 58 mm outside diameter the fatigue load limit Cur is 10 kN, the limiting speed 10,200 r/min and the thermal reference speed 5,600 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 1.26 kN/mm and per millimetre of width 2.00 kN/mm — the reason 22 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 220 g, just 0.17 g per mm² of projected 58×22 mm envelope, which keeps unbalanced forces low in fast-actuating linkages 35 mm bore marks the medium range: mounting forces and fits become critical, and the 220 g mass calls for proper induction or press tooling rather than hand fitting The 11.5 mm section still holds a full needle pack; like all needle bearings it cannot tolerate angular misalignment, so shaft and housing axes must be parallel The inner ring is separable, so the outer-ring/roller assembly can be pressed into the housing first; the 57 kN C0 rating still assumes full rigid support under both rings X-life status (-XL) indicates the current Schaeffler premium execution at 35 mm bore; the 57 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include agricultural machine pivots and linkages, hydraulic and pneumatic pump eccentrics and textile machine heald and cam shafts, where the 58 mm outside diameter and 44 kN dynamic rating match the duty. In agricultural machine pivots and linkages the unit fits a compact 35 mm seat, and in hydraulic and pneumatic pump eccentrics the 220 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for textile machine heald and cam shafts, relying on the 22 mm width and the published 57 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. 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

• Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO.
• 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.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.