Can self-tapping be used to hit brick walls?
Self-tapping can be used as a brick wall.
Self-tapping screws are used for non-metallic or soft metals, without bottom holes and tapping, but they are not suitable for direct use on walls. When used on the wall, you need to drill a hole, put a plastic "silk sleeve" in the hole, and then screw on the tapping screw.
Matters needing attention in self-tapping installation construction
1. Before self-drilling, if it is metal, you need to drill a positioning hole first, and the diameter of the drill bit is slightly larger than the screw.
2, check the thickness of the material. ? If the thickness of the material exceeds that of the self-tapping drill, it is not recommended to use the self-tapping screw. Self-tapping screws are unknown materials that will not touch before the first thread when using screws.
3. Check the position near the electrical connection. If it is a metal material, the broken material of the self-tapping screw will be on the other side. This may cause small pieces of conductive medium to fall into the electronic connector.
4. The positioning screw is perpendicular to the material.
5. Fix the screw with fingers or other materials to ensure that the screw will not tilt during installation. Screwdrivers and screws that need to be fixed on the shaft with fingers.
What are the specifications of self-tapping screws?
There are 13 kinds of self-tapping screws in the market, such as T 1, T2.0, T2.3, etc. In addition, from the aspects of material, shape and use, it can also be divided into ordinary screws, self-cutting self-tapping screws or metal driving screws. Different types of screws have different functions and users, so they should be selected according to actual needs.
Introduction:
Screw refers to screw, which is a tool to tighten all parts of an object step by step by using the physical and mathematical principles of circular rotation and friction of the object. Screw is a general term for fasteners.
Metric thread unit is millimeter, and its tip angle is 60 degrees. Both American and English threads are in inches. The sharp angle of American thread is also 60 degrees, and that of British thread is 55 degrees.
Due to the different units of measurement, the representation methods of various threads are also different. For example, M 16-2X60 represents metric threads. He specifically refers to the screw's nominal diameter 16MM, pitch 2MM and length 60 mm, and another example: 1/4-20X3/4 means English thread.
He specifically means that the nominal diameter of the screw is 1/4 inch, there are 20 teeth in one inch, and the length is 3/4 inch. In addition, if American screws are to be represented, UNC and UNF are usually added after English screws to distinguish American coarse teeth from American fine teeth.
What do you mean by 4* 16 self-tapping, 4*25 self-tapping, 4* 16, 4*25?
4* 16 self-tapping means that M4 screws an automatic screw with a length of 16mm;
4*25 self-tapping refers to M4 screwing an automatic screw with a length of 25mm;
4* 16 refers to an ordinary screw with the length of 16mm screwed by M4;
4*25 refers to M4 screw with a length of 25mm;
What does m4 self-attack mean?
M4 self-tapping screw is a kind of M4 self-tapping screw. M4 indicates that the outer diameter of the thread is 4 mm. ..
Self-tapping screw A screw that can be tapped by itself. Generally, the screw must be machined organically before it can be screwed in. Lighten yourself when screwing the screw. In order to achieve the purpose of tapping, this kind of screw is generally pointed, which is convenient for squeezing the object to be screwed in.
What do the various parts of the self-tapping specification mean?
Automatic tapping machine mainly designs and manufactures automatic feeding, automatic clamping, automatic tapping and automatic blanking according to customer's workpiece requirements. Because it is tailor-made, the specifications are mainly the specifications of the workpiece, that is, the shape, diameter, inner diameter, tapping size and accuracy of the tapping piece.
Tap:
1. The orifice of the thread bottom hole on the workpiece should be chamfered, and both ends of the through-hole thread should be chamfered.
2. The position of the workpiece fixture should be correct, and the center line of the threaded hole should be placed in a horizontal or vertical position as far as possible, so that it is easy to judge whether the tap axis is perpendicular to the workpiece plane when tapping.
3. At the beginning of tapping, put the faucet as straight as possible, then put pressure on the faucet and turn the wringer. When cutting in 1-2 turns, carefully check and correct the tap position. Generally, when cutting 3-4 threads, the tap position should be correct. In the future, just turn the wrench, and don't put pressure on the tap, otherwise it will damage the thread profile.
4. When tapping, the wrench should turn around 1/2- 1 2 every turn, so that the chip can be easily discharged after breaking, and the phenomenon that the cutting edge sticks to the tap can be reduced.
5. When encountering an impenetrable screw hole, be sure to exit the tap and remove the debris from the hole.
Extended data:
Matters needing attention in self-tapping installation construction:
1. Before self-drilling, if it is metal, you need to drill a positioning hole first, and the diameter of the drill bit is slightly larger than the screw.
2, check the thickness of the material. ? If the thickness of the material exceeds that of the self-tapping drill, it is not recommended to use the self-tapping screw. If the tapping screw is unknown, it will not contact the material before the first thread.
3. Check the position near the electrical connection. If it is made of metal, the broken material of the self-tapping screw will be on the other side, which may cause small pieces of conductive medium to fall into the electronic connector.
4. The positioning screw is perpendicular to the material.
5. Fix the screw with fingers or other materials to ensure that the screw will not tilt during installation. Screwdrivers and screws that need to be fixed on the shaft with fingers.
6. Turn clockwise and gradually apply pressure to the screwdriver. Continue to turn the screwdriver until the screw completely enters the material. Observe carefully, don't screw the screw into contact with the material, and avoid screwing the screw hard to disturb the thread.
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