Describe the main operating features of any one of the following: Four-jaw independent chuck Strip heater Knurling tool. - Leaving Cert Engineering - Question i - 2018

The four-jaw independent chuck is used to hold workpieces securely while machining. Each jaw can be adjusted and moved independently, allowing for better centering of workpieces that may not be perfectly symmetrical. The jaws are controlled by their respective screws, which allows the operator to grip a variety of shapes—square, rectangular, or irregular—effectively. This flexibility enhances precision, especially for non-standard or eccentric shapes, making it suitable for complex engineering tasks.