SL182208-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 SL182208-XL model number is decoded

envelope 40×80×23 mm with a 20.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 97 kN and C0 91 kN; with a C/C0 ratio of 1.07 the 23 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 15.2 kN, the limiting speed 5,600 r/min and the thermal reference speed 3,650 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 2.42 kN per millimetre of the 40 mm bore and 4.22 kN per millimetre of the 23 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 550 g (0.30 g per mm² of the 80×23 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads the 40 mm bore places this bearing in the medium band, where the 80 mm envelope already carries ratings in the tens of kilonewtons SL18 bearings are separable for mounting: the inner ring with the self-retained roller set can be fitted separately from the plain-bored outer ring, which simplifies interference-fit assembly Reading the designation: SL18 marks the Schaeffler full-complement semi-locating type with one rib on the outer ring and two ribs on the inner ring; the rollers are axially guided by the inner ring while the outer ring can displace by the catalogue s-value 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 40×80×23 mm envelope. Typical applications include rope drums and winch drums, vibrating and oscillating machinery and marine and offshore winch arrangements, where the 80 mm outside diameter and 97 kN dynamic rating match the duty. In rope drums and winch drums the unit fits a compact 40 mm seat, and in vibrating and oscillating machinery the 550 g mass suits the compact, space-optimised housing. Designers also specify it for marine and offshore winch arrangements, relying on the 23 mm width and the published 91 kN static rating. The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling. Press-fit the correct ring: the rotating ring needs interference while the floating ring must slide on its seat to perform the non-locating function.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling.
• Press-fit the correct ring: the rotating ring needs interference while the floating ring must slide on its seat to perform the non-locating function.
• There is no cage: do not apply caged-bearing speed rules — the printed limiting speed is a hard kinematic ceiling set by roller-to-roller contact.