SL182938-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 SL182938-XL model number is decoded

envelope 190×260×42 mm with a 35.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 510 kN and C0 770 kN; with a C/C0 ratio of 0.66 the 42 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 118 kN, the limiting speed 1,420 r/min and the thermal reference speed 1,030 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 2.68 kN per millimetre of the 190 mm bore and 12.14 kN per millimetre of the 42 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 6.5 kg (6500 g) (0.60 g per mm² of the 260×42 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads at 190 mm bore this is among the largest catalogue sizes; the 1,420 r/min limiting speed confirms a slow-speed, extreme-load application such as a slewing or rolling-mill position SL18 bearings are separable for mounting: the inner ring with the self-retained roller set can be fitted separately from the plain-bored outer ring, which simplifies interference-fit assembly High radial rigidity at 510 kN C is the point of this design: rib-guided rollers in a cageless pack resist deflection in planetary gears, rope drums and vibrating machinery As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 118 kN Cur value. Typical applications include rope drums and winch drums, vibrating and oscillating machinery and marine and offshore winch arrangements, where the 260 mm outside diameter and 510 kN dynamic rating match the duty. In rope drums and winch drums the unit fits a compact 190 mm seat, and in vibrating and oscillating machinery the 6.5 kg mass is part of the rotor inertia calculation. Designers also specify it for marine and offshore winch arrangements, relying on the 42 mm width and the published 770 kN static rating. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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.
• 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.