SL182976-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 SL182976-TB model number is decoded

envelope 380×520×82 mm with a 70.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 1660 kN and C0 3300 kN; with a C/C0 ratio of 0.50 the 82 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 345 kN, the limiting speed 680 r/min and the thermal reference speed 380 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 4.37 kN per millimetre of the 380 mm bore and 20.24 kN per millimetre of the 82 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 52.1 kg (52100 g) (1.22 g per mm² of the 520×82 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads the 380 mm bore puts this execution at the top of the HR1 range — the 520 mm outside diameter, 82 mm width and 52.1 kg mass are built for primary-industry load cases 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 Reading the designation: SL18 marks the Schaeffler full-complement semi-locating type with one rib on the outer ring and two ribs on the inner ring; the rollers are axially guided by the inner ring while the outer ring can displace by the catalogue s-value 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 crane travelling-wheel mechanisms, compact slow-speed agitator drives and heavy industrial gearbox shafts, where the 520 mm outside diameter and 1660 kN dynamic rating match the duty. In crane travelling-wheel mechanisms the unit fits a compact 380 mm seat, and in compact slow-speed agitator drives the 52.1 kg mass is part of the rotor inertia calculation. Designers also specify it for heavy industrial gearbox shafts, relying on the 82 mm width and the published 3300 kN static rating. The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling. 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

• The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling.
• 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.
• 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.