A while I was eyeing new set of all metal machinist squares for my shop, but they seem so cold. Then I decided to make wooden squares but after giving it some thought I abandoned the idea. When you take into account the expansion of wood and difference in the expansion rate that comes with the grain direction, then it is easy to see that fully wooden squares are just toys unless they are made of plywood. Then I just thought of making metal squares with wood handles. It will look beautiful and would be very practical. Besides, we all deserve to have nice tools.
A year later after the build I decided to review the results by measuring the squares accuracy. After conducting extensive tests, it was determined that squares were as accurate as the day they were build. This validates the method used for building this squares. This picture shows test results. Yo can open zoomed picture by clicking on the image.
In this video I conduct extensive tests a year later after the initial build to determine accuracy. Also this video shows how to check any square for accuracy.
This video shows how to build process of three piece squares from one metal combinational square. In this video, we use old 12" combination square and 5" square to make a nice set of 4 squares. We use mahogany for handles and tune the squares before applying epoxy to rivets. For finishing, we use boiled linseed oil. The result is a beautiful and useful set of squares any craftsmen would be proud to own.
Most levels are set and calibrated at factory and sometime they deviate from true reading. This video shows how to make adjustable level and the process required for calibration. The advantage of this level that it can age very well, since you can calibrate it to perfection any time needed. This level is built using hardware from old combinational square. The project complexity is nominal and can be done with minimal tools.