Center Aligning Cones

thingiverse

These tools are designed to accurately center parts under the spindle of a mill, drill, or even in the 4-jaw chuck on a lathe when working with a part that has a circular hole or bore that needs truing up or enlarging. To get started, you will need an M8 bolt, threaded rod, or similar to mount in your chuck. Next, install a bolt through the center of the cone and hold it in place using the chuck or collet. Then, carefully lower the cone onto the circular hole on the face of the part you want to machine, aligning it with the center of the spindle. By applying moderate force on the spindle to keep it secure, you can clamp down your part with its center now accurately aligned with the spindle. This tool is not as accurate as a dial gauge but is perfectly sufficient for various applications, making it an essential addition to any workshop or home machine shop.