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The Importance of True Vertical Lift

When a high degree of accuracy is required to pick or place a load, precise lifting is required and this only facilitated through true vertical lift. This need for precision and accuracy is often a requirement in manufacturing operations, injection moulding or speciality applications for the pharmaceutical industry.

Single Reeving

It’s difficult to achieve true vertical lift with a single reeved wire rope hoist because the long, thin drum design means that the hook has greater horizontal movement allowed by the drums design and reeving during winding (raising and lowering). In a single reeved wire rope hoist there generally is a degree of hook drift expected, which is normal and acceptable for the majority of lifting and handling operations. Where there is a need for precision and accuracy a double reeved wire rope hoist, like the Eurobloc VT Electric Wire Rope Hoist (excluding VT1) would be required.

Double Reeving

The standard reeving configuration for a wire rope hoist offering true vertical lift would be ‘two-part double’ reeving which involves four separate parts of wire rope, and it is also common for ‘four-part double’ reeving involving eight separate parts of wire rope to be used. A double reeved wire rope hoist is configured with wire rope that is fed through a series of sheaves in the hook block and hook frame, as well as being wound on the left-handed and right-handed grooving of the drum.

Achieving Accuracy and Precision

Using more parts of wire rope in the reeving configuration allows for greater precision when lifting and handling heavier loads at slower speeds. Where there is a need for precision and accuracy a double reeved wire rope hoist, like the Eurobloc VT Electric Wire Rope Hoist (excluding VT1) would be required.