SL192308-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 SL192308-XL model number is decoded

envelope 40×90×33 mm with a 25.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 170 kN and C0 153 kN; with a C/C0 ratio of 1.11 the 33 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 29 kN, the limiting speed 5,000 r/min and the thermal reference speed 3,050 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 4.25 kN per millimetre of the 40 mm bore and 5.15 kN per millimetre of the 33 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 1.01 kg (1010 g) (0.34 g per mm² of the 90×33 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads at 40 mm bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 33 mm width as a standard mounting space Large SL1923 sizes in HR1 are typically the TB design with oxide-finished surfaces; the 1.01 kg mass reflects the thick, deformation-resistant rings At 5,000 r/min limiting speed the SL1923 is a slow-speed, high-load bearing — the cageless rollers trade kinematic speed for the 170 kN dynamic rating -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 170 kN C rating and longer nominal life come without an envelope change. Typical applications include rolling-mill and steel-industry drives, hydraulic pumps and radial piston pumps and material handling conveyor pulleys, where the 90 mm outside diameter and 170 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 1.01 kg mass is part of the rotor inertia calculation. Designers also specify it for material handling conveyor pulleys, relying on the 33 mm width and the published 153 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. Relubrication paths matter: specify the annular groove/hole executions where access is poor, because the tightly packed rows trap old grease.

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.
• Relubrication paths matter: specify the annular groove/hole executions where access is poor, because the tightly packed rows trap old grease.
• 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.