(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...