Lock washer

The lock washer is a fastening component placed between the lock nut and the bearing to prevent the nut from loosening due to vibration. Its design with inner and outer tabs allows locking the nut in the desired position. It is used in bearing assemblies mounted on shafts, where adjustment security is critical. To select it, consider the shaft diameter, the lock nut thread pitch, and the bearing type; the washer must match the thread and the seat.

In the MR catalog you will find 77 SKF lock washer references, with series such as W, MB, MBL, MS, and WF. The W series corresponds to washers with inner and outer tabs for bearing lock nuts; MB are safety washers with outer tab; MBL are similar but thicker for higher loads; MS are lock washers for bearing lock nuts with slots; WF are retaining washers for slotted lock nuts. Each series has standardized dimensions, and examples such as W 06, MB 0, MBL 40, MS 3052-48, and WF-90 show the variety of sizes available.

Typical applications include industrial machinery, power transmission equipment, conveyor rollers, pumps, fans, and gearboxes. In all cases, the lock washer ensures the lock nut does not move, extending bearing service life and preventing premature failures. It is common in maintenance of rotating equipment where vibrations are present.

To request a quote, you need to provide the washer part number (for example, W 06, MB 0, MBL 40, MS 3052-48, WF-90), the shaft and nut dimensions, or the equivalence with the bearing you are mounting. If you do not have the part number, we can help you identify it with the assembly data. Contact us by WhatsApp or email with that information and we will send you the quote.

MR Accesorios Industriales SRL has more than 80 years of experience in Buenos Aires, Argentina, and distributes brands such as SKF. In addition, it manufactures split plummer block housings, ANSI roller chains, and pulleys under its EMMAR brand. For lock washers, ask us about the reference you need and we will advise you.