SL185008-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 SL185008-XL model number is decoded

envelope 40×68×38 mm with a 14.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 113 kN and C0 133 kN; with a C/C0 ratio of 0.85 the 38 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 22.8 kN, the limiting speed 6,300 r/min and the thermal reference speed 4,200 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 2.83 kN per millimetre of the 40 mm bore and 2.97 kN per millimetre of the 38 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 560 g (0.22 g per mm² of the 68×38 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 68 mm envelope already carries ratings in the tens of kilonewtons SL1850 denotes the double-row full-complement semi-locating bearing: two roller rows share the 40 mm bore, and the arrangement guides the shaft axially in one direction while allowing displacement s in the other Full-complement kinematics cap the speed at 6,300 r/min (reference 4,200 r/min); below that limit the double-row pack offers exceptional stiffness for its section As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 22.8 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 68 mm outside diameter and 113 kN dynamic rating match the duty. In rolling-mill and steel-industry drives the unit fits a compact 40 mm seat, and in hydraulic pumps and radial piston pumps the 560 g mass suits the compact, space-optimised housing. Designers also specify it for material handling conveyor pulleys, relying on the 38 mm width and the published 133 kN static rating. The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling. 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

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