Classification Of Locking Nuts

The first method is to screw two identical nuts onto the same bolt, with an additional tightening torque added between the two nuts to ensure reliable bolt connection.
The second type is a specialized locking nut that needs to be used in conjunction with a locking washer. The specialized locking nut is not a hexagonal nut, but a round nut with 3, 4, 6, or 8 notches on the circumference of the nut (depending on the size of the nut and the manufacturer's product series). These notches are not only the focus of tightening the tool, but also the clamping point of the locking pad.
The third type is to drill threaded holes that run through the outer surface of the nut to the inner thread surface (usually 2, distributed 90 degrees on the outer surface), used to screw in small diameter countersunk screws, with the aim of applying a centripetal force to the thread to prevent the locking nut from loosening. The high-quality lock nut sold in the market is embedded with a copper small piece on the inner circular surface of the nut that is consistent with the thread of the lock nut, to prevent the radial top screw from directly contacting the locked thread and damaging the latter. This type of locking nut is gradually being applied in shaft end locking situations of rotating motion parts, such as anti loosening of ball screw mounting end bearings.
The second anti loosening method is more reliable than the first, but the structure is relatively complex. Compared with the first two, the third clock has the characteristics of better anti loosening effect, simpler and more beautiful structure, and smaller axial size.