Spring-Loaded, Self-Ejecting, Safety Turnover Bars –
Spring-loaded turnover bars are most frequently used with mechanical power presses. Turnover bars can also be used on four-slides or any other machine where the bar might be sent into the air if it is inadvertently left in the bar ring hole and the machine is turned on. Each spring-loaded turnover bar is self-ejecting so it can’t be left in the bar hole.
In OSHA 29 CFR 1910.217, it says that “The employer shall provide spring-loaded turnover bars for presses designed to accept such turnover bars.”