Make One Yourself! DIY Tool for Locating the Center of a Circle

A center finder is an incredibly useful tool for marking the exact center of a circular piece, but if you don’t have one, you can make it yourself! In this post, you’ll learn how to create your own DIY V-shaped center finder with high accuracy using low-cost materials.     1. Basic Idea: The 90-Degree V Frame The heart of a DIY center finder is a right-angle (V-shaped) frame with a guide hole at the apex . When this V frame is aligned to the edge of a circle and a line is drawn through the apex, multiple lines from different angles will intersect at the true center. 2. Materials Needed MDF or plywood (3–5mm thick recommended) Saw or laser cutter Set square or precision triangle Screws or wood glue Pencil or scribe     3. How to Build It Cut two right triangles out of MDF or plywood. Join them to form a perfect 90-degree V-shaped frame. Drill a small hole at the apex where the two arms meet. This is w...