SL183030 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 SL183030 model number is decoded

envelope 150×225×56 mm with a 37.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 475 kN and C0 700 kN; with a C/C0 ratio of 0.68 the 56 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 93 kN, the limiting speed 1,740 r/min and the thermal reference speed 1,430 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 3.17 kN per millimetre of the 150 mm bore and 8.48 kN per millimetre of the 56 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 7.33 kg (7330 g) (0.58 g per mm² of the 225×56 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads 150 mm bore, 225 mm outside diameter: at this size the 700 kN C0 rating and rigid full-complement pack replace multi-bearing arrangements in compact heavy-duty designs The dimension-series digits place this bearing in the SL18 section of the HR1 plan, giving the 37.5 mm section height between the 150 mm bore and the 225 mm outside diameter 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 Typical applications include crane travelling-wheel mechanisms, compact slow-speed agitator drives and heavy industrial gearbox shafts, where the 225 mm outside diameter and 475 kN dynamic rating match the duty. In crane travelling-wheel mechanisms the unit fits a compact 150 mm seat, and in compact slow-speed agitator drives the 7.33 kg mass is part of the rotor inertia calculation. Designers also specify it for heavy industrial gearbox shafts, relying on the 56 mm width and the published 700 kN static rating. The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling. 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

• The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling.
• C0 is the number that tempts overload in slow machinery, but fatigue life is still governed by the dynamic C rating and lubricant film.
• 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.