My week this week! My workshop videos!

[hermetic]

Hi folks, Part two of aligning the Colchester headstock, plus stripping and rebuilding a three jaw chuck, in order to clean and oil it, and get it working to its full potential accuracy and smoothnes! Three jaw chucks all have runout, even when brand new and good quality, expect 3 to 4 thou runout, and more on an import! They are convenient and quick, and as long as you are turning all the diameters of your component, any runout is ireelevant, but if you need to use the outside diameter of the bar as well, it will not be concentric with the diameters you have turned! If you need to do this, use a 4 jaw! A 4 jaw is the most accurate chuck you have!
Phil, in sunny hot and summery East Yorkshire! It won't last!!