What is a Chain Block?
A chain block or block and tackle is means of lifting heavy loads via sprocket driven chain that is reduced through a series of gears so that it may easier be driven by hand through another (non-load bearing) chain and sprocket.
What is a chain block used for?
Chain blocks are typically used in locations where there is no power available. Chain blocks are used for lifting light or heavy loads vertically where precision, and not speed, is a key requirement.
They can be used safely and easily by just one person, like if a technician needs to lower a hoist into place carefully, or if a motor needs to be removed from a tight spot
Key components of a chain block
- Main sprocket or load sprocket
This unit is specifically designed to manage a designated load and chain dimension.
Mated perfectly with its sprocket and comes with various forms of protection against the elements. For example, galvanized chain will offer a higher form of protection against moisture and rust
This is a unidirectional gearing mechanism that runs freely in the up motion but has angled teeth and a pawl that holds the load when the hand wheel is not in motion.
- Gearbox casing
The reducer or gearbox Is where the magic happens that multiplies the effort of the operator allowing them to lift heavier loads. Gears need to remain lubricated and free of dust and obstruction.
- Hand wheel and chain
As the description suggests this is the part that joins the operator to the equipment.
Advice When Buying A Chain Block
Look for brands that offer maximum protection in terms of safety (overload protection) and that give better value in terms of life span and cost of ownership. Be careful of brands that use non- standard chain sizes as this could affect your productivity when distributors have stock issues. Non standard chains also typically cost significantly more than standard chains without any tangible quality improvement.