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SAMPRA :: Single Girder Electric Overhead Travelling Crane


SG EOT crane is a type of overhead travelling crane in which there is single girder across the span of crane. The hoist trolley of crane hangs from the bridge/ girder.

Hoist Mechanism

It consists of a bottom block fitted with a standard swivel hook. The bottom block is suspended from trolley on 2 or 4 falls of wire rope. The wire rope is wound on a grooved drum which is sufficiently long to accommodate the length of rope required for the specified lift of hoist. The hoist drum is driven through motor- gearbox- brake- coupling arrangement. Straight & helical spur gearing are used for all motions. The greabox are totally enclosed type and the lubrcation of gears & pinion is achieved by splash lubrication of the oil within the enclosure. Squirrel cage AC motor is used to power hoist mechanism. DC Drum brake / DC disc brake is used to stop hoist drum at particular position during lifting/ lowering of load.

Single Girder EOT Crane
Single Girder EOT Crane

Cross Travel Mechanism

It consists of a frame structure which runs on pairs of wheels. One pair of wheels are driving wheels and the other pairs of wheels are driven wheels. The wheels are single flanged with taper / parallel treads to suit to the monorail. The wheels are driven through geared motor arrangement. DC disc brake is used to stop CT motion.

Bridge/ Girder

Bridge consists of single web or double web box type structural construction on which the hoist trolley moves. Long travel drive assembly is provided on either sides of the bridge for movement of the crane on the gantry rails.

Long Travel Mechanism

The Long Travel Mechanism consists of assembly of motor- brake- coupling- gearbox - wheel. The LT wheel runs on rails provided on the gantry. Crane wheels are double flanged.

For safety purpose spring buffers are provided at the four corners of the bridge of crane. Also a two way lever operated Limit Switch is provided for LT motion.

The crane is operated from a pendant hanging from crane.

Use our SG EOT Crane Design Calculation Software for obtaining design parameters of various components of Single Girder Electric Overhead Travelling (EOT) Crane.