May 21

01-double girder-EOT cranes-bridge-crab-hoisting machinery set-gantry girder-rail on the bridge

The most adaptable and the most widely used type of power driven crane for indoor service is undoubtedly the three motion EOT crane. It serves a larger area of floor space within its own travelling restrictions than any other permanent type hoisting arrangement.

As the name implies, this type of crane is provided with movement above the floor level. Hence it occupies no floor space and this can never interface with any movement of the work being carried out at the floor of the building.

The three motions of such crane are the hoisting motion and the cross travel motion. Each of the motions is provided by electric motors.

The above characteristics have made this type of crane suitable for medium and heavy workshop and warehouses. No engineering erection shop, machine shop, foundry, heavy stores is complete without an EOT crane.

In a steel plant, rolling mill, thermal power plant, hydraulic power plant, nuclear power plant, this type of crane is considered indispensable. In short in all industries, wherein heavy loads are to be handled, EOT crane find its application.

EOT Crane Parts:

A EOT crane consists of two distinct parts

  • 1. Bridge
  • 2. Crab

Bridge:

01-semi automatic cranes-automatic cranes-crane_for_automotive_industry-special cranes-standard overhead travel crane

The Bridge consists of two main girders fixed at their ends and connected to another structural components called the end carriages. In the two end carriages are mounted the main runners or wheels (four or more) which provide the longitudinal motion to the main bridge along the length of the workshop. The motion of the bridge is derived from an electric motor which is geared to a shaft running across the full span of the bridge and further geared to a wheel at each end. In some design separate motors may be fitted at each corner of the main bridge. The wheels run on two heavy rails fixed above the floor level along the length of the shop on two girders, called gantry girder.

Crab:

The Crab consists of the hoisting machinery mounted on a frame, which is in turn mounted on at least four wheels and fitted with suitable machinery for traversing the crab to and fro across the main girders of the crane bridge. Needless to mention that the crab wheels run on two rail sections fixed on the top flange of the main bridge. Thus the load hook has three separate motions, these being the hoisting, cross traverse of the crab, and longitudinal travel of the whole crane. Each motion is controlled independently of the other motions by separate controllers situated in a control cage or in a suitable position for controlling from the floor by pendent chains.

The essential parts are:

01-eot-crane-essential parts-eot crane working

  1. Bridge– 2 No’s
  2. End carriage– 2 No’s
  3. Wheel of the bridge– At least 4 No’s
  4. Crab (without auxiliary hoist)– 1 No’s
  5. Hoisting machinery set– 1 No’s
  6. Wheels of crab– At least 4 No’s
  7. Bottom Block (without auxiliary hoist)– 1 No’s
  8. Lifting hook– 1 No’s
  9. Rail on the gantry girder for crane movement– 2 No’s
  10. Rail on the bridge for crab movement– 2 No’s
  11. Operators cabin– 1 No’s

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13 Responses to “Electric Overhead Travelling Crane | EOT Crane | EOT Crane Parts”

  1. parthiban says:

    need some more precise information……with some examples..like loads acting on crane , distance & height calculations , catalogues ,etc.

    • admin says:

      all the things are available in my website. just search and get it.

      • s.sahaya helmen says:

        I SEARCH ALL THE BOOK STORE. THIS BOOK NOT AVAILABLE IN THAT STORE. WHEN I GET THIS BOOK. PL HELP ME SIR.

    • s.sahaya helmen says:

      respected sir,
      i am studying mechenical engineering in jeppiar engineering college. i am doing my final year project in the topic of “DESIGN OF ELECTRIC OVERHEAD TRAVELLING CRANE” for 10TONES. SPAN-17750MM, HEIGHT OF LIFT-6000mm,DUTY CLASS-4,GIRDER TYPE-DOUBLE, APPLICATION-INDOOR, MATERIAL TO LIFT- IRON FABRICATION, OPERATION- FLOOR OPERATION, SPEED( MAIN HOIST-3M/MIN, LONG TRAVEL-12M/MIN,CROSS TRAVEL-15M/MIN),MOTOR TYPE-SQUIRREL CAGE,HEIGHT FROM GROUN FLOOR-5800MM,CRANE RAIL TO TRUSS TIE LEVEL CLEARENCE-1400MM.

      I WANT DESIGN ALL THE PART OF E.O.T. 1.bridge grider. 2.crap, 3.end carrige.

      • Rajesh says:

        I am Happy to Help you. your project is very nice you can send me details and get all the information which is required you

    • s.sahaya helmen says:

      SIR,
      I WANT ONE BOOK.NAME- MATERIAL HANDING EQUIPMENT,
      AUTHOR-REDENKO.N,PUBLISHERS- MIR PUBLISHERS

    • s.sahaya helmen says:

      WHERE I GET THAT BOOK SIR. PL HELP ME

  2. krishna says:

    sir plz show me elictric motor works with the help of images. it is better to under standing

  3. sankar says:

    Sir, I need the clear picture with fuction of eac for 40 ton EOT crane

  4. vyshak s says:

    Sir
    Please help me to prepare a job safety analysis of lifting using eot crane

  5. Ivan Gavazzi says:

    The only book I know about the subject is from an autor called RUDENKO from Mir Publisher. You may find his book over the net.
    Most of the material I´ve found are from master and Phd Tesis. If you have access to some university library, then maybe you´ll find something more. Since I´m from Brazil, I think it will no be helpful to post books in portuguese here.

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