SL182204-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 SL182204-XL model number is decoded

envelope 20×47×18 mm with a 13.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 45.5 kN and C0 37 kN; with a C/C0 ratio of 1.23 the 18 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 6.2 kN, the limiting speed 10,400 r/min and the thermal reference speed 6,500 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 2.27 kN per millimetre of the 20 mm bore and 2.53 kN per millimetre of the 18 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 160 g (0.19 g per mm² of the 47×18 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads at 20 mm bore this size balances the 47 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The dimension-series digits place this bearing in the SL18 section of the HR1 plan, giving the 13.5 mm section height between the 20 mm bore and the 47 mm outside diameter In the 47 mm envelope the cageless pack raises C0 to 37 kN; the trade is the 10,400 r/min limiting speed, set by roller-to-roller sliding rather than by a cage As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 6.2 kN Cur value. Typical applications include rolling-mill and steel-industry drives, hydraulic pumps and radial piston pumps and material handling conveyor pulleys, where the 47 mm outside diameter and 45.5 kN dynamic rating match the duty. In rolling-mill and steel-industry drives the unit fits a compact 20 mm seat, and in hydraulic pumps and radial piston pumps the 160 g mass suits the compact, space-optimised housing. Designers also specify it for material handling conveyor pulleys, relying on the 18 mm width and the published 37 kN static rating. Use the rib structure correctly: SL18/SL1850 give one-direction axial guidance, SL0149 locates both ways and SL0249 floats — pairing two locating bearings on one shaft binds thermal growth. C0 is the number that tempts overload in slow machinery, but fatigue life is still governed by the dynamic C rating and lubricant film.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Use the rib structure correctly: SL18/SL1850 give one-direction axial guidance, SL0149 locates both ways and SL0249 floats — pairing two locating bearings on one shaft binds thermal growth.
• C0 is the number that tempts overload in slow machinery, but fatigue life is still governed by the dynamic C rating and lubricant film.
• 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.