What Is the Function of Dragline?

A dragline excavator is a piece of heavy equipment used in civil engineering, surface mining and excavating. A large excavator uses a dragline to pull a bucket by a wire cable. The operator lowers the bucket down to material that is supposed to be excavated.

Why is dragline so important?

All spiders make so-called dragline silk that functions in part as a lifeline, enabling the creatures to hang from ceilings. And it serves as a constant connection to the web, facilitating quick escapes from danger.

How does a dragline operate?

A dragline usually refers to a large bucket excavator that is controlled by a system of pulleys, chains, and ropes that hoist the bucket. ... The ropes are powered by a strong motor and have two main parts. The hoisting rope, which hoists the bucket from the boom. The drag cable then draws the bucket system horizontally.