R on American Crane & Equipment Corp.

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Crane and Hoist Equipment and Components by Type > Resource Center > Crane Glossary > R


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		RADIO CONTROLS A method of operating a crane or hoist by remote means using a portable transmitter to communicate to a crane mounted receiver.




		RADIOACTIVE WASTE As defined by the Nuclear Regulatory Commission: "Radioactive materials at the end of a useful life cycle or in a product that is no longer useful and should be properly disposed of."




		RATED LOAD The maximum load which the crane is designed to handle safely.




		REEVING Terminology used to describe the path of the hoist wire rope as it pays off the hoist drum and wraps around the various upper and lower sheaves.




		REGENERATIVE BRAKING A method of controlling speed in which electrical energy generated by the motor is feedback 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.




		RESISTOR RATING Rating established by NEMA which classifies resistors according to percent of full load current on first point and duty cycle.




		ROPE GUIDE A component of a host drum designed to facilitate the proper position of the wire rope as it pays off the drum.




		ROTATING AXLE An axle which rotates with the wheel, and is supported by a bearing at each end.




		RPM Physical stops welded to the column to limit the rotation of the jib. These stops are generally field mounted.




		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 COLLECTOR SHOE The sliding contact device that draws power from the fixed runway conductor system and carries it to the crane.




		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.