Use and use characteristics of tapping inserts for soft metal solutions

Tapping inserts for soft metal, also known as self-tapping braces, are a new type of fastener to strengthen thread strength, both inside and outside. The tapping inserts for the soft metal have teeth embedded in plastic, aluminum, cast iron, copper, and other soft materials, which can form a higher strength of internal thread holes; tapping inserts for soft metal (self-tapping braces) can also repair the broken internal thread. Self-tapping sleeve installation does not need to tap the thread in advance; one can directly use the installation tool to screw it into the specific hole reserved for the base material, for the female thread that has broken teeth can also use the same screw as the original, economical and beautiful, for new products can increase its thread strength. Tapping inserts for soft metal (self-tapping sleeve) are now widely used in the automotive, rail car, shipbuilding, household appliances, construction machinery, service machinery, electronic products, engineering plastics, advanced composite furniture, aluminum die casting, and other industries. Tapping inserts for soft metal classification generally have iron die, wood teeth F is finger type, generally countersunk head, A refers typically to A-type teeth, that is, cusp teeth, B generally refers to B-type teeth, that is, flat tail teeth.

What are the materials of tapping inserts for soft metal?

The international tapping inserts for soft metal Materials are mainly used in the following types: Unhardened and unhardened steel.

Casehardened steel, zinc-plated, yellow chromate Stainless steel, zinc-plated, yellow Chromate Stainless steel, Brass, tapping inserts for soft metal material is generally carbon steel and stainless steel, material selection of 45 or 40Cr steel, tempering 250HB-280HB.

1. Carbon steel 1215: coated with colored zinc, suitable for aluminum alloy, copper alloy, plastic, and other engineering strength is low on the substrate, surface carburizing heat treatment.

2. Stainless steel SUS303 (304, 316, 316L): suitable for cast iron, other high-strength products, and surface passivation treatment.

The use characteristics of tapping inserts for soft metal:

1. The tapping inserts for soft metal can provide internal solid thread on the soft material, which can meet the needs of multiple maintenance and disassembly;

Tapping inserts for soft metal can effectively repair the damaged internal thread. The tapping inserts for soft metal can withstand high loads and be used on smaller inserts, thus making the structural design of the product more compact. Tapping inserts for soft metal are generally used after die casting, injection molding, or other manufacturing processes, which can simplify the product's structure and increase the yield. A tapping insert for soft metal is a fastener that can self-tapping thread, both inside and outside of the thread, mainly used to enhance the strength of the internal thread of the screw hole; tapping inserts for soft metal do not have to tap a thread in advance, can be directly screwed into the specific hole reserved for the base material, economical and beautiful, for new products can increase the strength of its thread.

2. Tapping inserts for soft metal have the self-tapping ability, and the base material does not need to tap teeth in advance, which can save cost. Tapping inserts for soft metal have strong vibration resistance and can prevent loosening. The contact surface with the finished product is large, the tension is muscular, and the product design can use lower strength materials or smaller specifications screws can also be used. For the female thread that has been worn or broken, it has a repairing effect, and the same screw can be used again with the tapping inserts for soft metal. There is no clearance with the base material, which also has good air tightness if it contains bubbles. Tapping inserts for soft metal installation is more straightforward and rapid, with only one assembly tool, lower cost, and almost no defect rate.

Installation method of self-tapping screw sleeve:

1. Tapping inserts for soft metal installation method: When the number of installations is small, you can take a simple installation method, which is to bring the corresponding specification bolt + nut method, fix the self-tapping screw sleeve on the corresponding type of bolt, fixed with the same kind of nut, so that the three become a whole, and then use a wrench to screw the screw sleeve into the bottom hole, and then pull the bolt out.

2. Self-tapping screw sleeve installation method: When the number of installations is more, the unique self-tapping screw sleeve installation tool can be used, first install the self-tapping screw sleeve on the unique tool, screw the tool installed with the screw sleeve into the prefabricated hole about a circle, ensure that the tool and the prefabricated hole end face vertical and then force the screw sleeve into, when the self-tapping screw sleeve end face is lower than the prefabricated hole end face about 0.2mm, stop screwing and reverse the unique tool out. The end of the self-tapping screw sleeve installation tool is a hexagonal head, which can be connected with a manual tapping wrench or an electric or pneumatic tool.

Tapping inserts for soft metal Installation precautions:

1. refer to the drilling size specifications and pre-drilling processing for different processing materials. When the hardness of the corresponding material is high, please slightly increase the bottom hole in the drilling range.

2. The slotted end of the screw sleeve is downward, and the self-tapping screw sleeve is fully installed into the front end of the tool and must be in vertical contact with the workpiece. When loading (1 ~ 2 pitch), please align the bottom hole and never tilt. Do not reverse the tool when you find a tilt; re-adjust it before using it. After entering 1/3 ~ 1/2, you can not come back again. In addition, please do not reverse-rotate the tool. Otherwise, it will cause product failure.

3. The self-tapping sleeve should be at least 1mm lower than the part's surface after assembly.

Where are tapping inserts for soft metal used?

The tapping inserts for soft metal are self-tapping threaded inserts with a slot or opening, whereas the slotted tapping inserts for soft metal are recommended for most applications. In some materials, this screw sleeve provides perfect screw-specific locking efficacy. If this does not work, using the 307/308 model is generally recommended, which makes a breakthrough in material cutting difficulties. This product has a very thick wall and three circular holes with cutting ability scattered on the wall; 307/308 products are especially suitable for the material thickness that is not too wide. Generally, there is no need to install self-tapping sleeves for products that are not required, but some essential connection parts need to be installed due to high tension requirements or unique design. Tapping inserts for soft metal is strictly according to ISO/TS16949 quality system to produce and test products; tapping inserts for soft metal applications almost throughout the metal and plastic processing industry products have long been used in the automotive industry, civil and commercial vehicle engines, transmissions, aviation industry, rail car industry and so on.

Tapping inserts for soft metal are suitable for light alloys (aluminum, magnesium, zinc, and their alloys), cast iron, brass bronze, thermosetting plastics and laminates, wood, and other substrates, and are widely used in automotive, rail cars, ships, home appliances, electronic products, engineering plastics, aluminum die casting and other fields. Generally in the car engine, transmission components and other components such as rear-view mirrors, heat sinks, shock absorbers, etc.; Flange joints of various equipment, construction equipment, fuel equipment, etc.; Household appliances and office equipment; Self-tapping inserts for soft metal are used in capacitors, high-current equipment, radio frequency and telecommunications systems, dental equipment, etc. In the military, self-tapping screw sleeves are also used, mainly used in tanks, fighter jets, ships, and so on.

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