Aditya make Single Girder cranes are modular in
construction and are available in two verities Electric Overhead
Travelling (EOT) and Under slung type.
The cranes are of modular design using standard wire rope hoist. Compact
and light weight design ensures lower building space, most optimum
utilization of floor space and lower building loads
Special Features of Modular Cranes :
- Light Weight and compact construction minimizing building loads and
- Suitable for Light and Medium duty workshop applications
- All motors are TEFC with class F insulation
- Heavy duty cast steel rope guide
- Upper and Lower hook travel limit switch
- Additional Counter weight operated over hoist limit switch as option
- VVVF drives are available as an option
- Compact and lightweight festoon cable system
- Pendent and Radio remote control operation
The EOT Crane moves over the rails placed on the top of crane runway or
Gantry Girders. The crane mainly comprise of bridge girder made from rolled
sections such as I beams/ U beams or fabricated box section. The bridge
girder is supported on two end carriages, each housing a pair of wheels. The
wheels are driven by motor gearbox units. A wire rope hoist is suspended
below the bridge girder. The crane can be operated through pendent station
hanging from wire rope hoist or through radio remote control. The pendent
station can be made to move independent of hoist movement as per customers
The wire rope hoist comprise of rope drum made from seamless tube. Grooves
are machined on rope drum for proper support to the wire rope. Cast Iron
rope band and guide prevents wire rope jumping from grooves. The hoisting
drive arrangement comprises of motor coupled to an oil lubricated,
spur/helical gearbox that in turn provides the motion to the rope drum. An
electromagnetic fail safe brake prevents accidental lowering of load in the
event of power failure. Limit switch is provided to prevent over hoisting of
hook block. Additional limit switch can also be provided to prevent over
lowering of hook block.
The cross movement of hoist is achieved through the movement of wheels
supported on the beam/ box flange. The drive to the wheels is provided
through an electric motor-gearbox unit. Fail safe brake and limit switch are
provided as additional features is so desired by customer.
Power supply to the wire rope hoist is through festoon cable system. The
flexible cables are supported by cable hanger or cable trolleys that move on
either taught wire or enclosed C track depending on customer choice.
The Under slung single girder crane is very similar to overhead travelling
crane except for the fact that the end carriages are hung below the gantry
girders made of I section.
The single girder cranes find their application mainly for capacities up to
20 MT and Span up to 25 Meters. These are commonly used for light and medium
workshop duty applications. However, in rare cases the single girder cranes
are also used for hot metal ladle handling as well as with grab bucket.