Roll Pass Design: Producing 2X2 Angles From BilletSized ...
Jan 10, 2014· Their mills date back to 1918 and they still do the roll pass design the same way as when it was opened. Drafters draw up each pass on a wooden board, then steel templates are made from the boards and the tooling to turn the rolls made from the templates. All of the boards, templates and cutter bits are still in storage in their vault.