SL183010-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 SL183010-XL model number is decoded

envelope 50×80×23 mm with a 15.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 88 kN and C0 94 kN; with a C/C0 ratio of 0.94 the 23 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 15.3 kN, the limiting speed 5,300 r/min and the thermal reference speed 3,700 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 1.76 kN per millimetre of the 50 mm bore and 3.83 kN per millimetre of the 23 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 430 g (0.23 g per mm² of the 80×23 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads 50 mm bore marks the medium range: mounting forces and fits become critical, and the 430 g mass calls for proper induction or press tooling rather than hand fitting The semi-locating function means this bearing locates the shaft in one axial direction and floats in the other — useful in two-bearing shafts where one position is fixed and the other absorbs expansion SL183010-XL is a single-row full-complement cylindrical roller bearing: no cage is fitted, so the maximum number of rollers runs between the rings, and the rollers guide themselves on the two inner-ring ribs 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 5,300 r/min limit. Typical applications include heavy industrial gearbox shafts, crane travelling-wheel mechanisms and vibrating and oscillating machinery, where the 80 mm outside diameter and 88 kN dynamic rating match the duty. In heavy industrial gearbox shafts the unit fits a compact 50 mm seat, and in crane travelling-wheel mechanisms the 430 g mass suits the compact, space-optimised housing. Designers also specify it for vibrating and oscillating machinery, relying on the 23 mm width and the published 94 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. 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.

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.
• 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.
• 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.