Block and Tackle: How It Works

What is a block and tackle system?

A block and tackle (also known as a chainblock) is a mechanism that can be used to lift and lower heavy loads using a chain.

In a standard block and tackle system, the chain is wound around two wheels. When the chain is pulled, it winds around the wheels and begins to lift the load that's attached to the chain.

Chainblocks can be attached to lifting slings or chain bags to lift the load more evenly.

How a block and tackle works

A block and tackle system is typically made up of a lifting chain, a hand chain and a grabbing hook.

First, the chainblock needs to be connected to the load via the grabbing hook. Then, when the hand chain is pulled, the chain tightens its grip on the wheel and forms a loop inside the mechanism - causing a tension which lifts the load from the ground.

This system can be used to lift loads manually, although electric block and tackle systems are popular because they require less physical exertion.

What can a block and tackle be used for?

Due to their lifting capabilities, block and tackle systems are commonly used in garages to remove engines from cars. Because they can be operated by one person, chainblocks are a wonderfully efficient way to complete lifting jobs which may otherwise have required two or more workers.

Block and tackle systems are also used on construction sites and on assembly lines.

Chainblocks come in a variety of different capacities, making them suitable for a wide range of operations. Here at SafetyLiftinGear, we stock block and tackle products with lifting capacities of up to 20 tonnes.

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Feel free to contact the SafetyLiftinGear team if you have any questions about our range of heavy-duty block and tackle products.