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ACHIEVING TRUE VERTICAL LIFT FOR PRECISE LIFTING WITH A WIRE ROPE HOIST

In essence, true vertical lift is a hoists ability to lift the hook straight up and down, to pick up or put down a load in an exact position with no hook drift. It occurs when a hoist (lower block) moves in a true vertical path between the lower limit of travel, which happens when the rope(s) anchored at each end of the drum wind from the centre of the drum outward (inward when raising the hook); enabling the hook and load to be centred below the middle of the drum. This design prevents the hook from wandering from one end of the drum to the other in the highest and lowest hook positions.

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