High efficiency EOT cranes are manufactured in four parts including extra heavy duty, heavy duty, medium duty and light duty. The designing department of industries has facilities through which they can cater the specific requirements of their clients. Following mentioned is a breakup of class as well as duty of EOT cranes:
Class I: Extra heavy duty EOT cranes. These are mostly used in continuous operations like that of in Steel mill along with being used in other industries where heavy engineering takes place. Moreover, EOT cranes that are used outdoors are also being designed specially.
Class II: Heavy Duty EOT cranes. These are mostly used in paper mills, heavy machinery shops, fabrications shops, etc.
Class III: Medium duty EOT cranes: These are used in machine shops along with on general engineering applications.
Class IV: Light duty EOT cranes: Warehouses, maintenance and assembly operations are performed with this type of EOT cranes.
Classification of EOT cranes
A. – As per trolley attachments: over slung or under slung trolley.
B. – As per the amount of girders: single as well as double girder.
C. – Remote controlled EOT cranes: Remote controlled operations are provided through Infra-red remote controls or Radio frequency controls.
Pros of EOT cranes
The overhead construction element makes the floor area to remain free.
Able to handle bulky and heavy load.
Cons of EOT cranes
The construction of stronger walls is crucial.
Can be operated within restricted areas.
Operation of these cranes is slow.
The risk of queuing is present.
Where EOT cranes are applied?
Outdoor and indoor installations.
Bulky, lengthy and heavy loads are handled with these cranes.
Nearly all types of implant handling can be done easily with special attachments.
Loading as well as unloading of railway wagons.
Standard features of EOT cranes
Design: low weight, compact dimensions, easily operated as well as maintained, modular design having a direct fit within the components.
Gear boxes: Precision flat spur/helical units are made up of light alloy having case hardening gears permanent grease/oil lubrication as well as high grade surface treatment.
Motors: Conical or cyndrical pole changing rotor motors are used in EOT cranes. These motors are casted with aluminum sections and are integrated with safety brakes having insulation class F which is IP54 protected.
Electric panel: The EOT crane has a modular design which has the capability to cover vast operating ranges. The entire system offers ease of installation as well as maintenance. This renders reliable operations having fuse circuitry, non-screwed terminals and ducted wiring. There are drive groups and every group has been provided with a device used for protecting the motor to get overload along with providing effective safety against barred overloading.
Brakes: Dual/single disc electromagnetic DC brakes are made part of EOT cranes. The feature of these brakes is that automatic brake is activated in case of power failure. The brake linings are designed to be environment friendly along with allowing long maintenance intervals to approx 1 million operations.