NA6913-ZW-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 NA6913-ZW-XL model number is decoded

envelope 65×90×45 mm: 65 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 12.5 mm radial section packed with small-diameter needle rollers C is 108 kN and C0 198 kN at the 65 mm seat; the C/C0 ratio of 0.55 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 90 mm outside diameter the fatigue load limit Cur is 34.5 kN, the limiting speed 6,300 r/min and the thermal reference speed 3,550 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 1.66 kN/mm and per millimetre of width 2.40 kN/mm — the reason 45 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 833 g, just 0.21 g per mm² of projected 90×45 mm envelope, which keeps unbalanced forces low in fast-actuating linkages with a 65 mm bore this is a heavy-industrial bearing: 833 g of stiff ring and roller set, specified where rigidity matters more than speed The inner ring is separable, so the outer-ring/roller assembly can be pressed into the housing first; the 198 kN C0 rating still assumes full rigid support under both rings This is the choice for OEM production on soft shafts: machine the 65 mm seat to the recommended tolerance, fit the bearing, and let the inner ring provide the precision raceway The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 65×90×45 mm envelope. Reading -ZW: two needle rows instead of one; the load is spread over the 45 mm width while the outside diameter stays a compact 90 mm. Typical applications include textile machine heald and cam shafts, agricultural machine pivots and linkages and connecting-rod small ends, where the 90 mm outside diameter and 108 kN dynamic rating match the duty. In textile machine heald and cam shafts the unit fits a compact 65 mm seat, and in agricultural machine pivots and linkages the 833 g mass keeps unbalanced forces low in fast linkages. Designers also specify it for connecting-rod small ends, relying on the 45 mm width and the published 198 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. On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.

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.
• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.
• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.