EOT Crane Parts:

OT crane consists of two distinct parts

• 1. Bridge
• 2. Crab

  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:

  

  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