PRODUCT DESCRIPTION Round Bar Center Finder | Round Work Piece Center Finder Tool 3/8" Shank Edge Finder – Center Finder: A edge-finder, or center-finder is a tool used in the spindle of a machine such as a mill. The device is used to accurately determine edges or markings and therefore the center of a workpiece or a previously machined feature during the set-up phase of a machining operation. How to Find the Center of a Circle 1. Step 1: Draw a Chord Across the Circle. Draw a line across the circle near the edge so it cuts the circumference in two places. 2. Step 2: Find the Mid Point of the Chord. Draw a line perpendicular to the chord, half way along it's length. 3. Step 3: Repeat Step 2 for Another Chord. 4. Step 4: Use More Chords for Accuracy
