A Tailstock Centre Set

摘要

Early in my machining days I made a simple rotating centre with two ball races in the nose, this proved not to be rigid enough so the new design incorporates a taper roller bearing in the nose and a stabilising ball bearing in the tail. Also I wanted exchangeable male and female tube centres so settled on MT1 as the fitting for the nose pieces. Dummy bearings or packers were made from brass to fit in place of the bearings to facilitate the turning of the MT3 on the outer body and the concentric boring of the MT1 in the inner body. These packers are the same size as the taper roller bearing and the same diameter as the tail bearing. One of them is the same width and bore the other is 10mm long with a concentric centre drill in one end.