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2. Hoist (mining) - Wikipedia

   en.wikipedia.org/wiki/Hoist_(mining)

   A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), although modern large hoists use alternating current drives that ...

3. Drawworks - Wikipedia

   en.wikipedia.org/wiki/Drawworks

   A modern drawworks consists of five main parts: the drum, the power source, the reduction gear, the brake, and the auxiliary brake. The apparatus can be powered by electricity (AC or DC), or the drawworks may be connected directly to internal combustion engines using metal chain-like belts. The number of gears could be one, two or three speed ...

4. Hoist (device) - Wikipedia

   en.wikipedia.org/wiki/Hoist_(device)

   Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.

5. Headframe - Wikipedia

   en.wikipedia.org/wiki/Headframe

   The Kintore Headframe and winding drums in Broken Hill, New South Wales The steel headframe of the Ottiliae shaft (1876) in Clausthal-Zellerfeld, the oldest existing headframe in Germany A headframe [ 1 ] ( gallows frame , [ 2 ] winding tower , [ 3 ] hoist frame , [ 3 ] pit frame , [ 3 ] shafthead frame , [ 3 ] headgear , [ 3 ] headstock ...

6. Crane (machine) - Wikipedia

   en.wikipedia.org/wiki/Crane_(machine)

   Counter jib: holds counterweights, hoist motor, hoist drum and the electronics. [65] Hoist winch: the hoist winch assembly consists of the hoist winch (motor, gearbox, hoist drum, hoist rope, and brakes), the hoist motor controller, and supporting components, such as the platform. Many tower cranes have transmissions with two or more speeds.

7. Fly system - Wikipedia

   en.wikipedia.org/wiki/Fly_system

   As a result, fleet angles limit how close a dead-haul drum hoist can be mounted to the head block (usually about 10 feet). A moving drum hoist, or traveling drum hoist, is a variation on the traditional drum hoist. Moving drum hoists effectively eliminate the fleet angle between drum and block by shifting the drum along its axis as it spins.

8. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. Wire rope spooling technology - Wikipedia

   en.wikipedia.org/wiki/Wire_rope_spooling_technology

   The fleet angle is defined as the largest angle of the rope between the first sheave and the drum flange, relative to the centre line of the drum. With all type of drums, the rope is subject to a fleet angle which impacts on its behaviour and affects lifespan. Fleet angle should be between 0.25° and 1.25°, depending on the rope construction.