SL183015-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 SL183015-XL model number is decoded

envelope 75×115×30 mm with a 20.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 162 kN and C0 192 kN; with a C/C0 ratio of 0.84 the 30 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 33 kN, the limiting speed 3,450 r/min and the thermal reference speed 2,490 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 2.16 kN per millimetre of the 75 mm bore and 5.40 kN per millimetre of the 30 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 1.06 kg (1060 g) (0.31 g per mm² of the 115×30 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads at 75 mm bore the 115 mm outside diameter and 30 mm width target rolling stands, construction machinery and heavy gearboxes; the limiting speed drops to 3,450 r/min 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 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 As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 33 kN Cur value. Typical applications include heavy industrial gearbox shafts, crane travelling-wheel mechanisms and vibrating and oscillating machinery, where the 115 mm outside diameter and 162 kN dynamic rating match the duty. In heavy industrial gearbox shafts the unit fits a compact 75 mm seat, and in crane travelling-wheel mechanisms the 1.06 kg mass is part of the rotor inertia calculation. Designers also specify it for vibrating and oscillating machinery, relying on the 30 mm width and the published 192 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. 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.

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.
• 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.
• The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling.