What is a Collet? Types and Applications

A collet is a type of tool holder used in machine tools, such as lathes and milling machines. It is typically a cylindrical or tapered metal sleeve that is slipped over the end of a tool, such as a drill or a cutting tool, to hold it securely in place during operation.

The collet is designed to grip the tool firmly and consistently, allowing for precise control of the tool's position and movement during the machining process. The collet can be made from a variety of materials, including steel, aluminum, and carbide, depending on the specific application and requirements.

There are different types of collets available, including:

1. Standard collets: These are the most common type of collet and are used in a wide range of machine tools. They have a cylindrical shape and are typically made from steel or aluminum.
2. Tapered collets: These collets have a tapered shape, which allows for easier insertion and removal of the tool. They are often used in high-speed machining applications where quick tool changes are required.
3. Positive locking collets: These collets have a special design feature that provides positive locking of the tool, ensuring that it remains securely in place during operation. They are often used in high-precision machining applications where accuracy and repeatability are critical.
4. Adjustable collets: These collets allow for adjustment of the tool position and can be used to compensate for tool wear or other factors that may affect the machining process.

Overall, collets play an important role in maintaining the precision and accuracy of machine tools, and are a crucial component in many industrial manufacturing processes.