NK7-10-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 NK7-10-TV-XL model number is decoded

envelope 7×14×10 mm: 7 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 3.5 mm radial section packed with small-diameter needle rollers C is 3.25 kN and C0 2.65 kN at the 7 mm seat; the C/C0 ratio of 1.23 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 14 mm outside diameter the fatigue load limit Cur is 0.42 kN, the limiting speed 34,500 r/min and the thermal reference speed 43,000 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 0.46 kN/mm and per millimetre of width 0.33 kN/mm — the reason 10 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 6.9 g, just 0.05 g per mm² of projected 14×10 mm envelope, which keeps unbalanced forces low in fast-actuating linkages at 7 mm bore this is one of the smallest HR1 executions — chosen where a 14 mm envelope must carry line-contact loads that no miniature ball bearing could take Reading the NK prefix: a machined (not drawn-cup) outer ring with the needle complement; an inner ring from the IR series can be added later if the shaft cannot be hardened The thin 3.5 mm section makes the 6.9 g bearing sensitive to seat geometry — a tapered or lobed journal preloads part of the needle set and shows up as local pitting As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 0.42 kN Cur value. -TV denotes the PA66 cage: light, quiet and self-lubricating in dry-running moments, but limited by the polymer's continuous-temperature ceiling well below the ring steel's. Typical applications include hydraulic and pneumatic pump eccentrics, copying and printing machine mechanisms and agricultural machine pivots and linkages, where the 14 mm outside diameter and 3.25 kN dynamic rating match the duty. In hydraulic and pneumatic pump eccentrics the unit fits a compact 7 mm seat, and in copying and printing machine mechanisms the 6.9 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for agricultural machine pivots and linkages, relying on the 10 mm width and the published 2.65 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. 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

• Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO.
• Keep the specified radial clearance; an oversized shaft or heavy interference removes it and the needles bind hot immediately.
• 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.