ER40 Collet

An ER40 collet is a type of precision clamping device commonly used in milling, drilling, and other machining applications. It features a cylindrical body with a series of slots along its length, allowing it to compress when tightened, thus securely gripping a tool or workpiece.

Key Features:

1. Size and Compatibility: The "40" in ER40 indicates its size, which can accommodate tool shanks ranging from 1/16 inch to 1 inch (or 1.5 mm to 26 mm), depending on the specific collet used.
   
   

2. Design: ER40 collets are typically made from high-quality steel or other durable materials, ensuring they can handle the forces involved in machining. Their design promotes even distribution of clamping pressure, enhancing grip and minimizing runout.
   
   

3. Versatility: These collets are widely used in CNC machines, lathes, and milling machines due to their versatility and ability to hold a variety of tool shapes and sizes.
   
   

4. Ease of Use: ER40 collets are easy to install and remove, making them convenient for quick tool changes. They are usually tightened with a collet nut, which is easily adjusted.
   
   

Precision: Known for their accuracy, ER40 collets help maintain tight tolerances in machining operations, making them a preferred choice for precision work.