SL185015-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 SL185015-XL model number is decoded

envelope 75×115×54 mm with a 20.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 275 kN and C0 385 kN; with a C/C0 ratio of 0.71 the 54 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 66 kN, the limiting speed 3,450 r/min and the thermal reference speed 2,370 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 3.67 kN per millimetre of the 75 mm bore and 5.09 kN per millimetre of the 54 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 1.93 kg (1930 g) (0.31 g per mm² of the 115×54 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads the 75 mm bore belongs to the large band, where HR1 full-complement and track-roller designs deliver their highest kilonewton ratings in slow, heavily loaded machinery The SL1850 tolerates no angular misalignment — the two roller rows distribute load only when shaft and housing axes are parallel, so housing bore alignment is a mounting requirement Reading SL1850: dimension series 50, double row, no cage; the bearing is supplied with annular lubrication features and is intended for oil or grease lubrication in heavy gearboxes As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 66 kN Cur value. Typical applications include planetary gear bearing positions, construction machinery slewing drives and compact slow-speed agitator drives, where the 115 mm outside diameter and 275 kN dynamic rating match the duty. In planetary gear bearing positions the unit fits a compact 75 mm seat, and in construction machinery slewing drives the 1.93 kg mass is part of the rotor inertia calculation. Designers also specify it for compact slow-speed agitator drives, relying on the 54 mm width and the published 385 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.