Distinguish between self-drilling screws and self-tapping screws

Screws are one of the common fasteners, and there are many types of screws, among which self-drilling screws and self-tapping screws are also a type of screws. Today, we makes the following comparisons between self-drilling screws and self-tapping screws, and distinguishes between self-drilling screws and self-tapping screws.

1. Distinguish between self-drilling screws and self-tapping screws in terms of use:

Drilling screws are mainly used for fixing color steel tiles of steel structures, fixing on thin plates, etc. The main feature is that the tail is drill tail. When in use, there is no need for auxiliary processing, and operations such as drilling, tapping, and locking can be completed directly on the material at one time, which greatly saves installation time.

Self-tapping screws have high hardness, and can also be used on some materials with high hardness, such as iron plates and so on. Features low screw-in torque and high locking performance.

2. Distinguish between self-drilling screws and self-tapping screws in terms of performance

Drilling screw is a tool that uses the physical and mathematical principles of the inclined plane circular rotation and frictional force of the object to tighten the machine parts step by step. A self-drilling screw is a screw with a self-tapping drill head on the front end of the screw.

Self-tapping screws are mostly used for the connection between thin metal plates (steel plates, saw plates, etc.). When connecting, first make a threaded bottom hole for the connected piece, and then screw the self-tapping screw into the threaded bottom hole of the connected piece.