SL182918-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 SL182918-XL model number is decoded

envelope 90×125×22 mm with a 17.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 122 kN and C0 169 kN; with a C/C0 ratio of 0.72 the 22 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 27 kN, the limiting speed 3,100 r/min and the thermal reference speed 2,050 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 1.36 kN per millimetre of the 90 mm bore and 5.55 kN per millimetre of the 22 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 840 g (0.31 g per mm² of the 125×22 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads at 90 mm bore the 125 mm outside diameter and 22 mm width target rolling stands, construction machinery and heavy gearboxes; the limiting speed drops to 3,100 r/min High radial rigidity at 122 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 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 X-life status (-XL) indicates the current Schaeffler premium execution at 90 mm bore; the 169 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include construction machinery slewing drives, material handling conveyor pulleys and planetary gear bearing positions, where the 125 mm outside diameter and 122 kN dynamic rating match the duty. In construction machinery slewing drives the unit fits a compact 90 mm seat, and in material handling conveyor pulleys the 840 g mass suits the compact, space-optimised housing. Designers also specify it for planetary gear bearing positions, relying on the 22 mm width and the published 169 kN static rating. 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. 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

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