CNC Chuck Er32 Standard Machine Clamp Elastic Collet 3~20mm

ER Collets are a standardized type of spring collet primarily used to hold cutting tools (like end mills and drills) in CNC machine tools such as machining centers.

Core Function: They work by being tightened with a nut, which causes the elastic sleeve to contract and clamp onto the cylindrical shank of the tool. ER collets are used in conjunction with tool holders (like the BT tool holders previously discussed) to connect the holder and the cutting tool.

Main Standard: They conform to the DIN 6499/ISO 15488 international standard with a 16-degree taper, ensuring wide compatibility