Author’s note: No, I haven’t gone all English or Canadian on you. The above headline is from the April 1925 edition of The Woodworker, my favorite old woodworking magazine. I enjoy reading magazines that were printed when hand tools still held sway in the home workshop. Below is a fantastic little centreing jig you can build in a few minutes from shop scraps.
— Christopher Schwarz
A CENTREING TOOL — The sketch illustrates a home-made tool for centreing materials which have to be turned. It works on the same principle as a parallel rule, but has a centre cross bar which carries a tooth similar to the steel spur of a marking gauge. This tooth is for marking the work. The great advantage of this appliance is that it will centre material of irregular shape as easy as regular stock. The one I use is made of mahogany and when opened out square is 3-1/4 ins. wide, and will therefore centre anything, say, from 3 ins.