(1) every time running 12000km for secondary care, shall be assembled engine oil pan, check the use of the engine bearing shell, if discover individual bearing shell clearance is too large, should be replaced, replace at the same time should also replace the connecting rod bolt.  In normal operation, if the engine is found to be running unsteadily and has abnormal noise, it should also...

When we use to fix some objects, in order to enhance the overall firmness, we mostly use countersunk bracket bolts. This is a general designation. The types and types of countersunk bracket bolts used according to different use requirements can be said to be diversified, but even the best products will fail during use. Do you know the failure forms and causes of countersunk bracket bolts? ...

Fastener products must meet the following five common standards in production to ensure the customer's utilization rate of the quality of screw and bolt products.  What are the standard conditions for Track Bolt products?  There are mainly the following five kinds. First, the screw bolt product size standards: specify the basic dimensions of the product content;  Products...

1, Track Bolt platingElectroplating of rail bolts means that the part of rail bolts to be electroplated is immersed in a specific aqueous solution, which will contain some deposited metal compounds, so that after current passes through the aqueous solution, the metal substances in the solution precipitate out and adhere to the immersed part of rail bolts.  Electroplating of rail bolts...

First, the roof bolt coating adhesion strength inspection There are many methods to evaluate the adhesion between the coating and the base metal. The Cap Screw Factory will introduce you to the following types. Friction polishing test;  2. File test;  3. Scratch method;  4. Bending test;  5. Thermal shock test;  6. Extrusion method. Second, the Roofing...

First, the roof bolt coating adhesion strength inspection There are many methods to evaluate the adhesion between the coating and the base metal. The Cap Screw Factory will introduce you to the following types. Friction polishing test;  2. File test;  3. Scratch method;  4. Bending test;  5. Thermal shock test;  6. Extrusion method. Second, the Roofing...

      The problem of high strength bolt cleaning is often manifested after heat treatment and tempering. The main problem is that the rinse is not clean. Due to the unreasonable stacking of bolts, alkali liquid remains on the surface, which causes surface rust and alkali burns or improper selection of quenching oil to rust the fastener surface. Today, a...

First, the oil is protected from the surface. This step is also performed when the DIN 603 bolt products are shipped from the factory. The tools for cleaning iron products are rags and stainless steel oil. The stainless steel oil is poured on the rags and then wiped back and forth on stainless steel items until the coating is stopped.2. If you re-maintain the long-lasting DIN...

A lot of people have such questions: how to deal with the friction surface of high-strength Roofing Bolts connection? If the large component requires local friction surface treatment, how to protect the treated friction surface? Salt Yihui Answer: There are three processes: First, the wire brush by hand sanding, shot blasting treatment is two, three raw red rust is sandblasted, with the...

Generation of defects1) For the Roofing Bolts used for level adjustment, adjust the entry and exit positions to determine the horizontal alignment of the cabinet door. After the cabinet door position is determined, the relative position of the roof bolts and the hinge body is determined. Due to the need for position adjustment, the roof The bolt will be in an intermediate suspended...

The treatment cost of hot-dip galvanized Roofing Bolts is actually very low. This is a conclusion compared with other paint coatings. In fact, the coating on the roof bolt or the coating on other fasteners is actually used to prevent rust and corrosion. It is the least expensive to deal with the types of roof bolts, and the longer the protection, the longer Not to mention hot-dip...

Precautions: During transportation, loading and unloading, Roofing Bolts should be protected from thread damage. After using industrial petroleum jelly, it should be wrapped with plastic film to prevent thread damage and rust. It should be stored separately and should not be mixed with other parts and components to avoid damage to the threads. After the roof bolt is buried, it shall not be...

       The Roofing Bolts is one of the screws. The working principle is that the set screw is screwed into the screw hole of the machine to be fixed, and the end of the screw is pressed against the surface of the other machine, even if the previous machine is fixed on the On the latter. There are many types of screws, among which the slotted screw has the...

Domestic large and small Roofing Bolts companies can reach nearly 10,000, and the annual production of roof bolts has already exceeded 6 million tons. In terms of volume alone, it accounts for more than a quarter of the global roof bolt production. the first. We should also clearly understand that our roof bolt products are mainly concentrated in the low-end level, with low strength, low...

  Effect of electroplating: The quality of electroplating is mainly measured by its corrosion resistance, followed by appearance. The corrosion resistance is to imitate the working environment of the product, set it to the test conditions, and perform a corrosion test on it. The quality of electroplated products is controlled from the following aspects: Appearance:The surface of the...

Do you often encounter problems with loose Roofing Bolts? If routine maintenance of routine maintenance equipment is performed using a simple overview of the procedural approach, the need for repair services is reduced, and the method can inspect small items such as roof bolts and other fasteners that are securely fastened. . It not only saves the cost of future repairs, but also ensures that...

     Round Head Bolt are typically mounted on a building that requires permanent fastening. Because the ball studs are much stronger than ordinary strength bolts and their tensile strength is stronger, the ball studs are used on equipment that requires permanent fastening. In addition, the round head bolts are used on equipment with relatively large vibration. In...

After the Roofing Bolts  have been used for a long time, they need to be cleaned. How should they be cleaned so that the bolts are not rusted? When washing the roof bolts, be careful not to scratch the surface. Avoid using bleaching ingredients and abrasive-containing washing liquids, steel balls, grinding tools, etc. In order to remove the washing liquid, wash the surface with clean...

Stainless steel Roofing Boltsare a family of iron alloys, each with a chromium content of more than 12%. Chromium is an anti-corrosive ingredient, so all stainless steels are highly resistant to corrosion. In general, the higher the chromium content, the better the corrosion resistance. The nickel element in the stainless steel Round Head Boltuses fasteners in the process of using stainless...

Stainless steel generally refers to steel that can withstand the corrosive effects of air, water, acids, alkaline salts or other media. It focuses on rust and acid resistance, depending on the composition of the alloy. Although some steels have rust-preventing properties, they are not necessarily acid-resistant, and acid-resistant steels generally have rust-preventing properties. Austenitic...