6 Terms
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Cranes
A crane is a type of machinery used for lifting and moving heavy materials in construction, transportation (loading and unloading merchandise) and other fields. Most cranes are equipped with a hoist, wire ropes or chains, and sheaves, that can be used both to lift and lower materials and to move them around.
Industry: Industrial machinery
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Cranes
emergency braking
Industrial machinery; Cranes
When power is not available, this method is used to slow a drive. As a result of action by the operator, or, in some cases automatically when power to the drive is interrupted, the braking effort is ...
noncoasting mechanical drive
Industrial machinery; Cranes
When power is not available, this drive automatically results in decelerating a bridge or trolley.
heavy crane service
Industrial machinery; Cranes
When operating in excess of 10 lift cycles per hour or at 85 to 100 percent of rated load as a regular specified procedure is involved in the crane service
normal crane service
Industrial machinery; Cranes
When operating at less than 85 percent of rated load and not more than ten lift cycles per hour (barring isolated instances) is involved in the crane service
exposed
Industrial machinery; Cranes
When one would have the ability to contact, carelessly, a hazardous object due to its lack of isolation or guard.
primary upper-limit device
Industrial machinery; Cranes
When actuated, this main device limits the upward direction of the hoisting motion.
severe crane service
Industrial machinery; Cranes
When abnormal operating conditions are involved in either heavy or normal crane service
