Special bearings

Special bearings solve what a standard bearing cannot cover: non-standard dimensions, high precision, demanding speeds or temperatures, or equipment-specific mounting interfaces. They are used in spindles, machine tools, gearboxes, continuous process equipment, and mountings where radial or axial space is critical. Selection starts with the code engraved on the mounted bearing: from there, the series, construction, and dimensions are identified.

Designations vary greatly from one brand to another and do not follow a single scheme. In FAG, codes such as 234406-M-SP correspond to the 2344 series of angular contact thrust ball bearings for spindles; the suffix M indicates a solid brass cage and SP, a special precision class. In SKF, numeric codes such as 466880 and other alphanumeric codes such as BA2B 636039 A or AGHU2898X4E-DSCS appear, and in McGill codes such as D-206-13. Since each one corresponds to a proprietary development, the complete designation must be taken.

When there is no legible code, the housing and shaft dimensions, load, and speed are taken, and the functional equivalence is defined with the type of construction and sealing. To replace a precision bearing, along with the dimensions, the tolerance class, clearance or preload, and cage type must be respected, because they change the behavior of the assembly.

The brands we carry in this subcategory are FAG, SKF, McGill, and INA. To request a quote, send us the complete code engraved on the component or, if not available, the bore diameter, outside diameter, and width, with the type of construction and seal. If the equipment has a known equivalence, that also works. Request a quote by part number at MR via WhatsApp or email and we will respond promptly.