SL185044-TB 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 SL185044-TB model number is decoded

envelope 220×340×160 mm with a 60.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 1980 kN and C0 3650 kN; with a C/C0 ratio of 0.54 the 160 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 440 kN, the limiting speed 1,140 r/min and the thermal reference speed 630 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 9.00 kN per millimetre of the 220 mm bore and 12.38 kN per millimetre of the 160 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 51.6 kg (51600 g) (0.95 g per mm² of the 340×160 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads 220 mm bore, 340 mm outside diameter: at this size the 3650 kN C0 rating and rigid full-complement pack replace multi-bearing arrangements in compact heavy-duty designs SL1850 denotes the double-row full-complement semi-locating bearing: two roller rows share the 220 mm bore, and the arrangement guides the shaft axially in one direction while allowing displacement s in the other Reading SL1850: dimension series 50, double row, no cage; the bearing is supplied with annular lubrication features and is intended for oil or grease lubrication in heavy gearboxes The -TB feature concerns the rib contact, not the envelope: the 220×340×160 mm dimensions and 51.6 kg mass follow the standard series plan. Typical applications include marine and offshore winch arrangements, rope drums and winch drums and hydraulic pumps and radial piston pumps, where the 340 mm outside diameter and 1980 kN dynamic rating match the duty. In marine and offshore winch arrangements the unit fits a compact 220 mm seat, and in rope drums and winch drums the 51.6 kg mass is part of the rotor inertia calculation. Designers also specify it for hydraulic pumps and radial piston pumps, relying on the 160 mm width and the published 3650 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. The split outer ring of SL0149 is joined by retaining rings for handling only; never use those rings as a thrust face in the design.

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.
• The split outer ring of SL0149 is joined by retaining rings for handling only; never use those rings as a thrust face in the design.
• Relubrication paths matter: specify the annular groove/hole executions where access is poor, because the tightly packed rows trap old grease.