How to install the spring collet on the nut correctly
Spring chuck (bobbin) of CNC milling machine. It is a kind of cylindrical fixture which is used to imprison the drill or milling cutter on the milling machine. The utility model is a fixing device used for fixing and reinforcing the parts which need to be reformed. The structure principle of spring collet is as follows: the collet is installed in the lock nut, and then the locking nut with spring collet is screwed on the handle, connecting rod or spindle. Always clean the spring collet, the thread part of the lock nut, the locating surface and the taper surface. During the installation of the collet and the lock nut, the collet and the lock nut must be inclined at a certain angle, and then gently put into the locking groove of the lock nut. How to install / remove the spring collet correctly to the nut? The bottom of the nut is marked with small dots, and the groove of the spring collet is installed in the eccentric ring position of the nut. Push the spring collet in the direction indicated by the arrow until the click is heard, indicating that the spring collet is already installed. Then, install the tool and install the nut with spring collet on the handle. After the nut is unscrewed from the handle, push the bottom of the spring collet from the front of the spring collet and at the same time, slant the bottom of the spring collet towards the mark of the small circle point at the bottom until the spring collet and nut are separated. Spring chuck is often a good choice for turning at very high spindle speed, which mainly has two reasons: one is related to the quality of chuck. It is assumed that the same spindle horsepower is used to drive the chuck and spring chuck. The heavier chuck needs longer time to accelerate to achieve the required speed. The long acceleration time will extend the working cycle and reduce productivity. Another reason is the centrifugal force, which increases with the increase of the square value of RPM, so it is important in the case of high-speed cutting. For example, double the spindle speed and the centrifugal force will be four times the original. This force pulls the chuck claw away from the center, often reducing the clamping force. But the centrifugal force will not have obvious influence when spring chuck is used. Therefore, the clamping force will be more stable in the whole processing speed range.