Collets are also widely used in machine engines to form a collar for the inlet and exhaust valves and keep them under consistent pressure. As well, these devices are utilized in semiconductor projects and for many types of consumer crafts.  The automotive industry employs collets in various engine applications to keep internal mechanisms under constant pressure.

Collets form a collar around a workpiece or tool. Generally manufactured from spring steel or other similar materials, they are usually made with a vertical kerf, a slit created by cutting a piece of material with a saw. Collets are used to hold a tool in a central position as it rotates. As the tool is inserted into the collet, the device expands and provides uniform pressure that holds the tool in place. However, if the collet stretches too far, it cannot secure the instrument properly and may lose shape.

Whether you are operating a drill press or a CNC mill, collets are likely used to keep it running. TM Smith Tool is a recognized leader in the tool-holding systems industry. We provide high-quality parts, including various sizes of collets, for clients based all over the U.S.

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In general, the terms collet and chuck are used in contradistinction. Tools can be secured with either a chuck or a collet. In the context of this overview, chuck is used to refer to any chuck type other than a collet.

Collets have a limited range of motion when it comes to clamping. Many collets may be needed for projects that require clamping a given range of bits. Thus, the upfront investment to purchase these pieces is high, making them inappropriate for usage in electric drills and other tools with numerous components. However, the collet is often preferred over a traditional chuck because it can withstand harsh work environments and is suitable for repetitive tasks. Several features make collets ideal for a variety of applications:

A collet is a cylindrical sleeve that is classified as a subtype of chuck. The sleeve is used to form a collar around a tool or device, with a pointed outer surface and a tube-shaped inner surface. Collets apply a powerful clamping force on the object they are holding when tightened, generally provided by the conical outer surface.

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As with any tooling mechanism, there are many types and sizes of collets, making them versatile enough for various industries that require clamping devices. They are commonly used in a variety of machining industries: