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What Is EOT Crane?

An EOT crane, which stands for Electric Overhead Traveling Crane, is a type of material handling equipment commonly used in industrial settings, warehouses, and manufacturing facilities. EOT cranes are designed to move heavy loads horizontally and vertically within a defined area. They are particularly useful for lifting and transporting materials or products that are too heavy or cumbersome to be moved manually.

overhead crane 20t

Common Types of EOT Cranes

Electric Overhead Traveling (EOT) cranes come in various types and configurations, each designed to suit specific material handling needs and environments. Here are some common types of EOT cranes:

Single Girder EOT Crane

  • This type of crane has a single bridge girder, which is the horizontal beam spanning the width of the workspace.
  • Single girder EOT cranes are typically used for lighter lifting capacities and are cost-effective for applications with moderate load requirements.

Double Girder EOT Crane

  • Double girder EOT cranes have two parallel bridge girders.
  • They are capable of handling heavier loads compared to single girder cranes and are often used in heavy-duty industrial applications.

overhead crane 20t

Top Running EOT Crane

  • In a top running EOT crane, the wheels are on the top of the crane girder, and the top running crane travels on a rail system installed on the overhead structure.
  • These cranes are ideal for applications where headroom is not a concern.

10ton overhead crane for Russia

Under Running EOT Crane (Underhung Crane)

  • Under running EOT cranes have their wheels and trolley running on the bottom flange of the runway beam.
  • They are suitable for applications with limited headroom or where the underhung crane needs to travel beneath existing structures.

EOT Crane Specifications

The specifications of an Electric Overhead Traveling (EOT) crane can vary significantly depending on the specific model, manufacturer, and application requirements. However, here are some common specifications and parameters that are typically included when describing an EOT crane:

  • Lifting Capacity:The maximum weight that the crane can lift safely. It is usually specified in metric tons (MT) or kilograms (kg).
  • Span:The horizontal distance between the centerlines of the two runway beams (for top running cranes) or the distance between the support columns (for freestanding cranes). It is typically measured in meters (m) or feet (ft).
  • Lift Height (Hook Height):The vertical distance from the hook or lifting attachment to the floor when the crane is in its highest position. It is specified in meters (m) or feet (ft).
  • Crane Classification:The classification defines the duty cycle and the expected load spectrum the crane will handle. Common classifications include Class A, Class B, Class C, and Class D, with Class D being the most demanding and designed for heavy-duty continuous operation.
  • Hoist Speed:The speed at which the hoist can lift or lower a load. It is usually specified in meters per minute (m/min) or feet per minute (ft/min).
  • Trolley Speed:The speed at which the trolley can travel along the bridge. It is also specified in meters per minute (m/min) or feet per minute (ft/min).
  • Bridge Speed:The speed at which the entire crane can move horizontally along the runway beams. It is specified in meters per minute (m/min) or feet per minute (ft/min).
  • Control Method:EOT cranes can have various control methods, including pendant control, radio remote control, cabin control, or automated control systems.
  • Power Supply:The voltage and frequency of the electrical power supply required for the crane’s operation. It is typically specified in volts (V) and Hertz (Hz).
  • Duty Cycle:Defines the crane’s intended usage pattern, such as intermittent, short-duration, or continuous operation. It affects the design and maintenance requirements of the crane.
  • Environmental Conditions:Specifications may include details about the operating temperature range, humidity, and any special environmental considerations.
  • Safety Features:Details about safety features such as overload protection, emergency stop buttons, limit switches, and other safety mechanisms.
  • Optional Accessories:Additional equipment or accessories that can be included, such as a magnet attachment, a grab bucket, or specialized hooks.
  • Manufacturer and Model:Information about the crane’s manufacturer and model number.

It’s important to note that these specifications can vary from one EOT crane to another, and they should be carefully considered and tailored to the specific material handling needs and operating conditions of the facility where the crane will be used. Additionally, compliance with safety standards and regulations is crucial when selecting, installing, and operating an EOT crane equipment.

Key Features and Components of an EOT Crane

  • Bridge: The bridge is the horizontal beam that spans the width of the working area. It is supported by rails or runway beams and can move along the length of the facility.
  • Hoist: The hoist is the lifting mechanism attached to the bridge. It consists of a drum or pulley system with a cable or chain that is used to lift and lower loads.
  • Trolley: The trolley is the part of the crane that moves along the bridge, allowing the hoist to be positioned over different areas of the workspace.
  • Electrical components: EOT cranes are powered by electricity and often come with control panels for operators to manage the crane’s movements, including lifting, lowering, and horizontal travel.
  • End trucks: These are the wheeled assemblies at each end of the bridge, which run on the rails or runway beams. They allow the bridge to move horizontally along the length of the facility.
  • Operator cabin or pendant control: EOT cranes can be operated from an enclosed operator cabin or through a pendant control suspended from the crane itself. These controls enable precise positioning and movement of the crane.
crane structure
overhead crane structure

EOT cranes come in various configurations and lifting capacities, making them suitable for a wide range of applications, from light-duty operations in small workshops to heavy-duty tasks in large industrial facilities. They are often used in industries such as manufacturing, construction, shipping, and logistics to streamline material handling and improve efficiency.

How Does an EOT Crane Work to Handle Heavy Load?

Here’s a simplified step-by-step sequence of how an EOT crane typically works to lift and move a load:

  • 1. The operator activates the crane’s control system to move the bridge to the desired location above the load.
  • 2. Once the crane is positioned, the operator uses the controls to lower the hoisting mechanism and hook to the load.
  • 3. The hoisting mechanism’s electric motor is activated to lift the load off the ground.
  • 4. The operator uses the trolley controls to move the load horizontally to the desired location.
  • 5. Once the load is in position, the operator lowers it to the ground or the intended destination.
  • 6. The crane can then be moved away to repeat the process or perform other tasks.

EOT cranes are versatile and widely used in industries such as manufacturing, construction, warehousing, and logistics to efficiently handle heavy materials and products. Their ability to move loads both horizontally and vertically makes them essential tools for improving material handling processes in various applications.

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