When using a vertical milling machine to process some long rectangular templates, it is often necessary to use both a milling cutter and an end milling cutter together. Such frequent tool changes have reduced work efficiency. How can we achieve efficient production? This requires the use of end mill chucks. There are two main types of end mill chucks that are most commonly used on the market, one is good concentricity chucks (such as spring heads), and the other is side locking chucks.
1. Good concentricity chuck
Taking the spring chuck as an example, the spring chuck consists of a chuck body, an elastic clamp cylinder inserted into the chuck body, and a nut that is sleeved on the clamp cylinder and can tighten the threads. When tightening the nut, the elastic chuck that surrounds the circular shank can exert a strong clamping force on the shank, resulting in longer tool life, higher feed speed, and improved surface finish of the workpiece. However, this chuck does not have a physical stop mechanism, so it is easy to cause deflection and deformation of the chuck.
2. Side locking collet
The side locking chuck will push the tool away from the center position during clamping, so the cutting edge on one side of the milling cutter will bear more cutting loads. Once the cutting edge is worn, the entire tool will fail in advance. However, during heavy load rough milling, fastening screws can prevent the tool from being pulled out of the chuck hole.