Book em Dan O

I was thinking back to favorite TV shows when writing this post. The villains were chastised with the famous book em Dan O I say the same thing when a core pin breaks. “Book EM” Most of the dies that I cast provide for quick replace of cores and ejector pins. Access to a broken core or pin is accomplished by booking the die in the machine. The booking straps and the clamp motion expose the back of either the cover or ejector die. Set screws or clamp plates open an access passage to the pin. Better fragile core designs include either a core with a threaded extract hole or a clamp element which can be used to pull the core from the back side. Even more useful in saving effort is front load cores however this does not apply to bent ejector pin replacement which involves booking a die at a minimum.