NKI6-16-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 NKI6-16-TV-XL model number is decoded

envelope 6×16×16 mm: 6 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 5.0 mm radial section packed with small-diameter needle rollers C is 6.6 kN and C0 7.1 kN at the 6 mm seat; the C/C0 ratio of 0.93 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 16 mm outside diameter the fatigue load limit Cur is 1.21 kN, the limiting speed 31,000 r/min and the thermal reference speed 28,000 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 1.10 kN/mm and per millimetre of width 0.41 kN/mm — the reason 16 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 17.4 g, just 0.07 g per mm² of projected 16×16 mm envelope, which keeps unbalanced forces low in fast-actuating linkages 6 mm bore and only 17.4 g: the smallest sizes demand accurate shaft geometry, because the 5.0 mm section leaves no tolerance for a soft or tapered seat NKI6/16-TV-XL is supplied with a machined inner ring, so it mounts on an ordinary turned and ground shaft of normal tolerance — hardening the journal is not required Reading the NKI prefix: machined-ring needle bearing with inner ring, one roller row, capable of pure radial load at 6.6 kN C X-life status (-XL) indicates the current Schaeffler premium execution at 6 mm bore; the 7.1 kN C0 rating reflects the improved rolling-contact geometry. The -TV cage is part of the speed story here: cage-guided kinematics permit the published 31,000 r/min limiting speed without roller-to-roller sliding. Typical applications include small electric motor accessory drives, rocker arms and valve trains and planetary gear bearings, where the 16 mm outside diameter and 6.6 kN dynamic rating match the duty. In small electric motor accessory drives the unit fits a compact 6 mm seat, and in rocker arms and valve trains the 17.4 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for planetary gear bearings, relying on the 16 mm width and the published 7.1 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. Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.

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.
• Without an inner ring the shaft is the raceway: 58–64 HRC and a ground, polished journal are mandatory, not recommendations.
• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.