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About bolt hardness

About bolt hardness

Hardness represents a material's resistance to a hard object indenting its surface. It is one of the important performance indicators of metallic materials. Generally, the higher the hardness, the better the wear resistance. Common hardness indicators include Brinell hardness, Rockwell hardness, and Vickers hardness.

2015-08-31

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The origin of high-strength bolts

The origin of high-strength bolts

Historical records indicate that around 250 BC, Archimedes discovered the principle of the screw. It is said that he invented the Archimedean screw while in Alexandria, using it to lift river water for irrigation. He could never have imagined that this idea would become one of the most important fundamental driving forces of machinery. The screw is not only an important method for transmitting and amplifying power, but also the basis for the world's most widely used threaded fasteners. Its historical significance is profound.

2015-06-23

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The story of screws and lamps

The story of screws and lamps

Screws, though tiny, are arguably the greatest invention in human application. While they have only been around for five or six hundred years, the modern world would be crippled without them.

2015-06-05

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Precautions for using standard parts

Precautions for using standard parts

Product Usage Precautions: Stainless steel and carbon steel have essential differences. Stainless steel has better ductility; improper use may result in the screw and nut being unable to be unscrewed after being fastened. This is commonly known as "locking" or "seizing". Improvements to prevent seizing can be considered from the following aspects:

2015-05-19

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What are standard parts?

What are standard parts?

Standard parts refer to commonly used parts whose structure, dimensions, drawing methods, and markings have been fully standardized and are manufactured by specialized factories. National or industry standards stipulate their manufacturing, dimensions, and inspection. Manufacturers have corresponding molds and engage in mass production. Examples include threaded parts, keys, pins, and rolling bearings. Highly standardized and widely used mechanical parts and components are also known as general-purpose parts. In a broader sense, this includes standardized fasteners, connecting parts, transmission parts, sealing parts, hydraulic components, pneumatic components, bearings, and springs.

2015-05-17

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