NKI95-36-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 NKI95-36-XL model number is decoded

envelope 95×125×36 mm: 95 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 129 kN and C0 250 kN at the 95 mm seat; the C/C0 ratio of 0.52 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 125 mm outside diameter the fatigue load limit Cur is 44.5 kN, the limiting speed 4,400 r/min and the thermal reference speed 2,700 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 1.36 kN/mm and per millimetre of width 3.58 kN/mm — the reason 36 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 1.145 kg (1145 g), just 0.25 g per mm² of projected 125×36 mm envelope, which keeps unbalanced forces low in fast-actuating linkages at 95 mm bore the 125 mm outside diameter and 36 mm width target rolling stands, construction machinery and heavy gearboxes; the limiting speed drops to 4,400 r/min Reading the NKI prefix: machined-ring needle bearing with inner ring, one roller row, capable of pure radial load at 129 kN C The inner ring is separable, so the outer-ring/roller assembly can be pressed into the housing first; the 250 kN C0 rating still assumes full rigid support under both rings As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 44.5 kN Cur value. Typical applications include planetary gear bearings, small electric motor accessory drives and gearbox selector and change linkages, where the 125 mm outside diameter and 129 kN dynamic rating match the duty. In planetary gear bearings the unit fits a compact 95 mm seat, and in small electric motor accessory drives the 1.145 kg mass is part of the rotor inertia calculation. Designers also specify it for gearbox selector and change linkages, relying on the 36 mm width and the published 250 kN static rating. Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone. 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

• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.
• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.