Chain blocks

Posted : Thursday 22nd December 2011

This post looks at some properties and uses of a chain block

A chain block may also be referred to as a manual chain hoist, hand chain hoist or block and tackle. They are manually activated devices to aid in lifting heavy loads.

Basically a chain block works by attaching a load, and subsequently pulling down on one of the chains, the chain runs over a gear to raise the load, this increases the mechanical work being carried out by the gear ratio inside the devices housing.

Chain blocks are available in various forms with differing lifting capacities; Lifting Gear Direct can supply various models with capacities from 500kg up to 20’000kgs. Some varieties of these chain blocks come with an integrated trolley for convenience, and there is also the popular 360 degree chain block which allows full rotation to enable the user to work in nearly all positions, even above the load.

Chain blocks have a brake system to allow the load to be held in a raised position, most also have an overload prevention system for extra safety sometimes this may be an optional extra; other extras available are chain buckets, which keep the excess chain tidy and out of the way.

A chain block provides a convenient and versatile method to lift heavy loads; they are quick to fit, portable and cost effective, they are extremely useful for finer, accurate control of the load. Chain blocks are frequently seen being utilized in many areas such as workshops, and anywhere that using an electric hoist isn’t suitable due to lack of power supply or because of hazardous environments.

 

 

Tagged as: chain block, chain blocks, manual chain hoist

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