Classification of lock nuts

The first is to use two identical nuts to screw on the same bolt, and add a tightening torque between the two nuts to make the bolt connection reliable.

　　 The second type is a special lock nut, which needs to be used together with a lock washer. The special lock nut is not a hexagonal nut, but a middle round nut. There are 3, 4, 6 or 8 gaps on the circumference of the nut (depending on the size of the nut and the product series of the manufacturer). Several notches are not only the focus of the tightening tool, but also the entry point of the locking washer. (Guide: The soft adjustment method eliminates the axial clearance of the ball screw nut pair)

　　 The third type is to drill through threaded holes from the outer surface of the nut to the inner threaded surface (usually two, distributed at 90 on the outer surface), used to screw in small diameter countersunk screws. It is to apply a centripetal force to the thread to prevent the lock nut from loosening. At present, the lock nuts with better quality on the market are inlaid on the inner surface of the nut with a copper piece consistent with the thread of the lock nut, which is used to prevent the radial jack screw from directly contacting the locked thread and damage By.

This kind of lock nut has gradually begun to be used in the occasion of the shaft end locking of rotating parts, such as the anti-loosening of the bearing at the mounting end of the ball screw.

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