What is the tolerance range of precision screws?
What is the tolerance range of precision screws?
Convex washers are mainly punched out of iron plates. The shape is generally a flat washer with a hole in the middle. Flat washers are usually thin pieces of various shapes to reduce friction, prevent leakage, isolate, prevent loosening or Dispersing pressure, the rationality of its design structure and the safety during use are very important.
One of the steps in the screw production and processing process is to slot the screw head to facilitate the use of a screwdriver when tightening or loosening the screw. Generally, companies use manual sorting, and then use the cutting knife to slot the front end screws through the track, which is inefficient, and because the screws are not fixed, the cutting knife may easily fly out or break the blade during cutting. It is a safety problem, and after cutting, the screw head has rough workmanship and burrs, which is easy to hurt the hand.
Iron two combination screws can be sucked up with magnets, but stainless steel two combination screws are difficult to be sucked up. Environmentally friendly three-combination screws and non-environmentally friendly ones are invisible to the naked eye and require mechanical testing. It cannot be judged with the naked eye and out of thin air. The specifications of the two combination screws need to be determined by the national standard. The salt spray of the two combination screws needs to be measured with a salt spray machine for how many hours.
If you are installing rivet nuts specially, you can use a grinder, use a rivet machine, if you are a non-professional, you can directly install a few, and then tap with an awl. Rivet equipment (manual or pneumatic) cannot be used in the field of fastening using hammers to pull rivet nuts. It is widely used and is mainly used in the assembly of electromechanical and light industrial products such as aviation, furniture, automobiles, instruments, machinery, and decoration. Of course, it is more common than the rivet nut, and it is often difficult to distinguish.
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