SL183009-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 SL183009-XL model number is decoded

envelope 45×75×23 mm with a 15.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 70 kN and C0 74 kN; with a C/C0 ratio of 0.95 the 23 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 12.7 kN, the limiting speed 5,800 r/min and the thermal reference speed 4,200 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 1.56 kN per millimetre of the 45 mm bore and 3.04 kN per millimetre of the 23 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 400 g (0.23 g per mm² of the 75×23 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads the 45 mm bore places this bearing in the medium band, where the 75 mm envelope already carries ratings in the tens of kilonewtons High radial rigidity at 70 kN C is the point of this design: rib-guided rollers in a cageless pack resist deflection in planetary gears, rope drums and vibrating machinery The dimension-series digits place this bearing in the SL18 section of the HR1 plan, giving the 15.0 mm section height between the 45 mm bore and the 75 mm outside diameter -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 70 kN C rating and longer nominal life come without an envelope change. Typical applications include marine and offshore winch arrangements, rope drums and winch drums and hydraulic pumps and radial piston pumps, where the 75 mm outside diameter and 70 kN dynamic rating match the duty. In marine and offshore winch arrangements the unit fits a compact 45 mm seat, and in rope drums and winch drums the 400 g mass suits the compact, space-optimised housing. Designers also specify it for hydraulic pumps and radial piston pumps, relying on the 23 mm width and the published 74 kN static rating. The split outer ring of SL0149 is joined by retaining rings for handling only; never use those rings as a thrust face in the design. Relubrication paths matter: specify the annular groove/hole executions where access is poor, because the tightly packed rows trap old grease.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The split outer ring of SL0149 is joined by retaining rings for handling only; never use those rings as a thrust face in the design.
• Relubrication paths matter: specify the annular groove/hole executions where access is poor, because the tightly packed rows trap old grease.
• C0 is the number that tempts overload in slow machinery, but fatigue life is still governed by the dynamic C rating and lubricant film.