NA4828-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 NA4828-XL model number is decoded

envelope 140×175×35 mm: 140 mm bore accepts a normal-tolerance machined shaft via the integral inner ring, with a thin 17.5 mm radial section packed with small-diameter needle rollers C is 136 kN and C0 325 kN at the 140 mm seat; the C/C0 ratio of 0.42 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 175 mm outside diameter the fatigue load limit Cur is 51 kN, the limiting speed 3,050 r/min and the thermal reference speed 1,810 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 0.97 kN/mm and per millimetre of width 3.89 kN/mm — the reason 35 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 1.92 kg (1920 g), just 0.31 g per mm² of projected 175×35 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 140 mm bore puts this execution at the top of the HR1 range — the 175 mm outside diameter, 35 mm width and 1.92 kg mass are built for primary-industry load cases The integral inner ring brings the bore to 140 mm inside the 175×35 mm envelope; removing that ring gives the corresponding RNA/NK execution and a larger shaft for the same housing Reading the NA48 prefix: machined-ring needle bearing with inner ring, one roller row, capable of pure radial load at 136 kN C The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 3,050 r/min limit. Typical applications include connecting-rod small ends, textile machine heald and cam shafts and motorcycle and light-vehicle transmissions, where the 175 mm outside diameter and 136 kN dynamic rating match the duty. In connecting-rod small ends the unit fits a compact 140 mm seat, and in textile machine heald and cam shafts the 1.92 kg mass is part of the rotor inertia calculation. Designers also specify it for motorcycle and light-vehicle transmissions, relying on the 35 mm width and the published 325 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. Needle bearings are pure-radial units — any thrust must be taken by separate washers or an adjacent bearing, especially on flangeless RNAO/NAO.

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.
• 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.