The main accessories for bearings are ring nuts, locking sleeves and washers.
Sleeves may be the pull or compression type depending on the method of assembly and on their operating principle in terms of keying component. Their application is envisaged with the use of bearings with tapered bore, for which a component that assures attachment to the shaft is always requested, without altering the co-axial position once assembled. This also means that the shaft does not require further machining. The ring nut is required to secure the sleeve and the washer prevents the ring nut from working loose.