SL185038-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 SL185038-TB model number is decoded

envelope 190×290×136 mm with a 50.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 1430 kN and C0 2600 kN; with a C/C0 ratio of 0.55 the 136 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 325 kN, the limiting speed 1,320 r/min and the thermal reference speed 770 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 7.53 kN per millimetre of the 190 mm bore and 10.51 kN per millimetre of the 136 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 31.3 kg (31300 g) (0.79 g per mm² of the 290×136 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 1,320 r/min limiting speed confirms a slow-speed, extreme-load application such as a slewing or rolling-mill position The SL1850 tolerates no angular misalignment — the two roller rows distribute load only when shaft and housing axes are parallel, so housing bore alignment is a mounting requirement The semi-locating SL1850 structure uses inner-ring ribs with a retaining ring on the flangeless side; it carries high radial loads plus axial load in one direction, which is why it often pairs with an SL0149 locating bearing The -TB suffix denotes the increased axial-load design: profiled roller ends and optimised rib contact geometry lower edge stress and friction at the guide ribs. Typical applications include material handling conveyor pulleys, rolling-mill and steel-industry drives and construction machinery slewing drives, where the 290 mm outside diameter and 1430 kN dynamic rating match the duty. In material handling conveyor pulleys the unit fits a compact 190 mm seat, and in rolling-mill and steel-industry drives the 31.3 kg mass is part of the rotor inertia calculation. Designers also specify it for construction machinery slewing drives, relying on the 136 mm width and the published 2600 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. 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

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