Special-shaped stainless steel (stainless acid-resistant steel) screws are commonly used in three different sizes
In our daily life, special-shaped stainless steel (stainless acid-resistant steel) screws can be used, which can be said to be used from time to time. However, many people still do not understand (Find out) how to use special-shaped nuts in different specifications. To share the use of three different types of specifications common to special-shaped stainless steel (stainless acid-resistant steel) screws.
One is to use two identical shaped nuts to be screwed onto the same bolt, and a tightening torque is added between the two nuts so that the bolt connection is reliable. Non-standard screws are indispensable industrial necessities in daily life: tiny screws such as cameras, eyeglasses, watches, electronics, etc.; general screws for televisions, electrical products, musical instruments, and furniture; and engineering, construction, and bridges. Use large screws and nuts; transport equipment, airplanes, trams, cars, etc. The precision screw not only has a small screw head, but also has a small screw diameter, a short screw length, and a relatively light weight, and some precision screws can be ignored. Precision screw production and manufacturing process requirements are relatively accurate, in terms of tolerance requirements, size requirements and other aspects are very high.
The second is a special locking nut, which needs to be used together with a kind of anti-loose washer. The main purpose of the custom screws is to make the industrial products fixed and integrated. In use, it often happens that there is no close between the teeth and the teeth, if the screw head is broken too tightly, or the teeth are not tightly locked, the conditions are not met. The accuracy of the quality problem. The special locknut is not a hex nut but a round nut. There are 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 gaps are both the focus of the tightening tool and the snap-in of the bayonet washer.
The third is to drill threaded holes (usually two, 90 distributed on the outer circle) from the outer surface of the nut to the inner surface of the round thread, which is used to screw in the small-diameter countersunk head screw. The purpose is to apply a thread to the thread. The force in the centripetal direction prevents the lock nut from loosening. A good quality lock nut sold on the market (shì chǎng) is provided with a small piece of copper that matches the thread of the lock nut on the inner round surface of the nut to prevent the radial tightening screw from directly contacting the locked thread. And damage the latter. This type of lock nut gradually starts to be applied in the case where the shaft end of a rotary motion type part is locked, such as the loosening of the ball screw mounting end bearing (bearing).
The above analysis (Analyse) believes that the second method of preventing loosening is more reliable than the first one, but the structure is relatively complex, and the third kind has more relaxing effect than the former two methods. Good and simpler and more beautiful structure and axial size is smaller.