So how does the ER chuck clamp the tool?
In fact, its principle is very simple. The ER chuck has 16 grooves, which can make the ER chuck elastic. When in use, the collet is placed inside the locking nut. Both the collet and the locking nut have a certain taper, which is usually 16 degrees. Then screw the tool into the chuck, and there will be an outer ring on the other end that fits into the chuck. As the outer ring rotates clockwise, the outer ring moves axially, driving the ER chuck to move axially. Because of the taper, the ER chuck is extruded to produce elastic deformation, reducing the clamping hole diameter, thereby clamping the tool.
In fact, before the ER chuck appeared, the E chuck was commonly used on machine tools. However, after the E chuck is processed, the chuck can easily get stuck in the tool holder and be difficult to remove. In order to solve this problem, the REGO-FIX company specially developed a new type of chuck, which is now the ER chuck. The letter R is taken from the initials of the company's name. .