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Socket Basics

Jan 21, 2026

I. Classification by Drive Mechanism:

 

1. Pneumatic Socket (also known as Air-powered Socket)

 

2. Manual Sockets

 

II. Classification by Material:

 

1. Chrome-Molybdenum Steel: An alloy of chromium (Cr), molybdenum (Mo), iron (Fe), and carbon (C). It offers excellent high-temperature machinability, produces aesthetically pleasing finished parts, and can be deeply hardened. Its superior impact absorption properties make it commonly used in the industry for manufacturing pneumatic tools and large manual tools.

 

2. Chrome-Vanadium Steel: An alloy tool steel containing chromium and vanadium alloying elements, primarily used in manual tools.

 

3. 45# Carbon Steel (also known as 45 Steel) contains approximately 0.45% carbon. Its excellent machinability and versatile processing techniques make it the most commonly used material in steel fabrication.

 

Among the above materials, Cr-Mo (Chromium-Molybdenum Steel) offers the best properties and is the optimal material for sockets.

 

III. Applications of Sockets:

 

Sockets, also known as socket wrenches, are specialized tools primarily used with pneumatic wrenches, manual wrenches, and hydraulic wrenches to tighten or loosen screws and nuts. They are widely employed in automotive repair, power generation, mining, and other mechanical maintenance, inspection, and assembly operations. The Changlu series of sockets ranks among the top sellers.

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