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Crane Glossary
a b c d e f g h i j k l m n o p q r s t u v w x y z
RATED LOAD:
The maximum load which the crane is designed to handle safely as designated by the manufacturer.
RAIL SWEEP:
A mechanical device attached to the end truck of a bridge or trolley, located in front of the leading wheels, to remove foreign objects from the rail.
REGENERATIVE BRAKING:
A method of controlling speed in which electrical energy generated by the motor is fed back into the power system.
REGULATED SPEED:
A function which tends to maintain constant motor speed for any load for a given speed setting of the controller.
REMOTE OPERATED CRANE:
A crane controlled by an operator not in a pulpit or in the cab attached to the crane, by any method other than pendant or rope control.
REMOTE RADIO CONTROL:
A cordless means of control, utilizing analytical or digital radio signals to secure controls even in noisy environments.
RESISTOR RATING:
Rating established by NEMA, which classifies resistors according to percent of full load current on first point and duty cycle.
ROTATING AXLE:
An axle which rotates with the wheel.
RUNNING SHEAVE:
A sheave which rotates as the hook is raised or lowered.
RUNWAY:
The rails, beams, brackets and framework on which the crane operates.
RUNWAY CONDUCTORS:
The main conductors mounted on or parallel to the runway, which supplies current to the crane.
RUNWAY RAIL:
The rail supported by the runway beams on which the bridge travels.
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