Single Girder Overhead Crane

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Product Description

Single girder overhead crane is a lifting equipment that is horizontally mounted above workshops, warehouses and material yards for lifting materials. Its two ends are located on tall concrete columns or metal brackets, and its shape is like a bridge. It runs longitudinally along the tracks laid on the elevated platforms on both sides, which can make full use of the space under the bridge to lift materials without being hindered by ground equipment. It is the most widely used and largest type of lifting machinery. Single girder overhead cranes are usually equipped with CD1 or MD1 wire rope electric hoists, and the lifting mechanism can be single-speed or double-speed. It has the advantages of compact appearance, light weight, low wheel pressure, stable running speed, and easy installation and maintenance. It is suitable for maintenance operations, material handling and other places such as warehouses, workshops, power stations, etc.

Technical Parameters

Capacity( Ton)	1	2	3	5	10	16	20	32
Span(m)	5-28.5
Lifting Height(m)	6、9、12、18、24、30
Working Duty	A3
Control way	Pendant Control or Remote Control
Power Source	220V/380V 50HZ 3Phase or customized
Wheel Diameter(mm)	37-70
Electric Hoist Lifting and Travelling Mechanism
Electric Hoist Model	CD 1 Single Speed, MD 1 Double Speed
Lifting Speed (m/min)	Single	8
	Double	0.8/8
Traveling Speed(m/min)	20 or 30
Crane Traveling Mechanism
Motor Power(KW)	0.82 1.52

Characteristics

Main Structural Components

Bridge Girder: The primary horizontal beam (I-beam or box-shaped) that spans the workspace and supports the trolley and hoist.

End Trucks (End Carriages): Wheel-mounted structures at both ends of the girder, enabling the crane to move along the runway rails.

Wheels: Steel or polyurethane wheels that ride on the runway rails.

Bumpers/Buffers: Shock-absorbing pads to prevent damage during collisions.
Hoisting and Trolley System

Hoist: The lifting mechanism (electric or manual) with a motor, drum, and wire rope or chain.

Trolley: A unit that moves laterally along the girder, carrying the hoist.

Types: Underhung (runs on the girder’s lower flange) or top-running (rides on rails atop the girder).

Hook Block: Assembly connecting the hoist to the load (includes hook, sheaves, and pulley).
Runway, Drive and Motion Systems

Runway Rails: Fixed tracks (typically I-beams) mounted on the building structure for crane movement.

Runway Beams: Structural supports holding the runway rails, often attached to columns or walls.

Bridge Drive Mechanism: Motor(s) and gearboxes powering the end truck wheels for longitudinal movement.

Trolley Drive: Motor and gears to move the trolley along the girder.

Brakes: Electromagnetic or mechanical brakes to halt crane, trolley, or hoist motion.
Electrical and Control Systems

Control Pendant/Remote: Operator interface (pendant station or wireless remote) for directing crane movements.

Festoon System/Cable Reels: Manages power and control cables along the crane’s path.

Motors: Separate motors for bridge travel, trolley travel, and hoisting.

Limit Switches: Automatically stop the crane/trolley at predetermined travel limits.

Advantages

01Cost-effective: Lower material and installation costs compared to double girder cranes.
02Easier installation: Due to their lighter weight, they are easier and quicker to install.
03Versatility: Can be used in various environments and for different types of loads.

Application

01Manufacturing: Used in assembly lines and manufacturing plants to transport raw materials and finished products.
02Warehousing: Facilitates the movement of heavy items in warehouses, improving storage and retrieval efficiency.
03Maintenance: Employed in maintenance workshops for lifting and positioning machinery and equipment.
04Steel Industry: Used for handling heavy steel components and materials in steel plants.

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