Making Collet Blocks

Join me in the machine shop for the first official machining project. Here I’ll be making a pair of collet blocks for the 5C collet set I inherited from my grandfather. Collet blocks are a type of 5C collet fixture used for holding small round workpieces in the mill or anywhere else you might need them. I’m going back to the good old days and designing these on the drafting board using the set of manual drafting tools that were passed down to me as well. The final design will require both the metal lathe and the vertical milling machine, both of which have been recently “restored”. These parts will require almost every feature of the manual lathe. 3 jaw chuck, 4 jaw chuck, 5C collet chuck, tailstock drilling, boring bar, and even turning threads. Parts are then moved to the mill where they are face milled, center drilled, countersunk and I even do a little power tapping. Final parts are then inspected on the granite surface plate with a dial indicator and a bevel protractor. Through this project I learn a lot about my metalworking tools and I’m eager to dive into something else!


2 responses to “Making Collet Blocks”

  1. Like you, my grandfather was a toolmaker. He worked at GE for most of his life. Although he never graduated from high school, GE sent him to Engineering courses at MIT. He was gruff too. My folks had me late, so he was in his late 70’s by the time I took machine shop in high school. I wish I had been a little older so I could have learned more from him. I became an Electrical Engineer and worked in broadcasting for over 40 years. My grandfather knew electricity, but was fascinated by electronics. After my grandmother passed he moved in with my family for my last 3 years of high school. I got to know him a lot better. I think back to all the times I watched him build things in his basement as a little kid. I miss him.

    • Thanks for sharing, Ralph. Even though it was brief, I’m glad you got to know and learn from him. I have very similar experience, though I had a bit more time. Though I wish it was more.