Crane 1000 Series

The 100:1 gear manual speed control and bookfold mechanism are the same as those used on all Crane revolving doors. The primary material is .125 thickness aluminum construction and iron workers and experienced craftsmen in Crane's Chicago facility complete all door construction.

The Crane speed control is a free-wheeling, precision-machined, cast-steel geartrain mounted in the ceiling canopy or floor. It engages the brake automatically as speed approaches a set r.p.m. The brake shoes can be easily adjusted or replaced.

The Crane bookfold mechanism meets all state and federal requirements for providing emergency egress. The pressure to engage the bookfold mechanism is adjustable to meet local conditions - for example, stack conditions, negative pressure, and wind conditions.