Hängeblock

Hängeblock is a term used in rigging and lifting systems, referring to a movable pulley block whose housing is suspended from the load or a moving support. It is part of a block-and-tackle arrangement and contrasts with a fixed block, which is anchored to a stationary structure. In everyday use, Hängeblock is often described as the movable block in a pulley system.

A Hängeblock consists of a frame, one or more sheaves (pulleys) with grooves for rope or cable, and attachment points such as a hook or lashing eyes. The rope or cable runs through the sheaves and connects the moving block with other blocks or fixed supports. The design aims to reduce the force needed to lift a load by increasing the number of rope parts that support the load, thereby providing mechanical advantage. The actual advantage depends on the number of rope parts supporting the movable block and is affected by friction and rope condition.

Variants range from single-sheave movable blocks to multi-sheave configurations, often made from steel or aluminum. They are used in sailing, theater rigging, construction hoisting, industrial lifting, and rescue operations. The choice of block depends on load, desired mechanical advantage, rope diameter, and the operating environment. Proper maintenance includes regular inspection of the frame, bearings, and sheaves, lubrication where appropriate, and adherence to load ratings.

In practice, Hängeblock is typically paired with fixed blocks to form compounds that optimize lifting efficiency. Related terms include Fester Block (fixed block) and Flaschenzug (pulley system).