FAG 23240-B-MB Spherical Roller Bearing

The FAG 23240-B-MB is a large-bore, high-capacity spherical roller bearing designed for the most demanding rotating equipment in Saudi Arabia's heavy industrial and energy sectors. With a bore of 200 mm, outer diameter of 360 mm, and width of 128 mm, the 23240-B-MB is the bearing of choice for large compressor main shafts, turbine auxiliary bearings, heavy industrial fan hubs, and the drive shafts of large conveyor systems in the Kingdom's mining, petrochemical, and desalination sectors. The B-MB designation combines the B internal geometry — Schaeffler's design featuring optimised roller contact lines and a specific flange angle that reduces heat generation and increases load capacity over the original C design — with the MB machined brass cage, which provides the superior roller guidance, high-speed capability, and temperature resistance required in large bearings operating under significant loads at moderate to high speeds.

The 23240-B-MB achieves a basic dynamic load rating of 2,500 kN and a basic static load rating of 3,550 kN, positioning it among the highest-capacity spherical roller bearings available at this bore size. These extraordinary load ratings reflect both the increased number of rollers and the longer roller length relative to the bore enabled by the 232xx series geometry, making the 23240-B-MB particularly efficient for large shaft applications where space is constrained and the maximum possible load capacity per unit of bearing width is needed. The machined brass cage (MB) is the appropriate choice for this bearing size, offering precise roller spacing under the centrifugal forces generated at the bore diameter of 200 mm, eliminating the pocket wear and cage cracking that can affect pressed steel cages in large, heavily loaded spherical roller bearings.

In Saudi Arabia, the FAG 23240-B-MB serves critical roles in the Kingdom's most strategically important industrial assets. ARAMCO's main gas compressor trains at Ras Tanura and Abqaiq use large-bore FAG spherical roller bearings in the compressor main shaft positions, where a bearing failure translates to a multi-million-riyal per-day production impact. SABIC's large ethylene compressors at Jubail Industrial City specify FAG 23240-series bearings for their inherently superior misalignment accommodation relative to cylindrical roller alternatives — a practical advantage in Jubail's coastal environment where foundation movement from thermal cycling is observed. Saudi Aramco's GOSP facilities rely on large FAG spherical roller bearings in their crude oil transfer pump stations, and MARAFIQ's large-capacity seawater intake pump stations at Jubail use these bearings in their main shaft positions. Razz Middle East can source and supply the 23240-B-MB and related large-bore Schaeffler bearings under priority import from the Schaeffler European manufacturing network, with full traceability documentation for ARAMCO vendor qualification requirements.

For large-bore bearing applications, Razz Middle East's engineering team provides pre-installation bearing inspection reports, mounting temperature calculations, hydraulic mounting tool support, and post-installation vibration baseline measurements as part of our premium bearing supply service for critical rotating equipment in Saudi Arabia.