What is a Chain Block?

A chain block, also known as a block and tackle, is a manual device used for the vertical lifting and lowering of heavy loads. It is especially useful in areas without access to power, offering a simple yet highly effective lifting solution. Chain blocks are designed for precision over speed, making them ideal for careful, single-person lifting operations in various industries.

Key Components of a Chain Block

1. Load Chain
   Made from high-strength steel, this chain lifts and supports the weight of the load during operation.

2. Hand Chain
   This is the chain the user pulls to activate the lifting mechanism manually.

3. Lifting Hook
   A strong hook attached to the load chain for securely connecting to the item being lifted.

4. Load Sprocket (Main Sprocket)
   A toothed wheel that drives the load chain by transferring power from the gearbox.

5. Pawl
   A safety mechanism that prevents the chain from slipping backward, keeping the load securely suspended.

6. Gears
   These amplify the force applied through the hand chain, allowing for controlled lifting with minimal effort.

7. Braking System
   Ensures the load stays in position by preventing accidental lowering.

8. Gearbox Casing
   Protects internal components like gears and ensures smooth operation by retaining lubrication.

9. Hand Wheel
   Attached to the hand chain, it enables manual control for precise lifting and lowering.

How Does a Chain Block Work?

To operate a chain block:

• Attach the lifting hook to the load.

• Pull the hand chain, which turns the internal gears and sprocket.

• This action tightens the load chain, forming a loop and lifting the load upward with control and stability.

Chain blocks can also be used with lifting slings made of chain, webbing, or wire rope to distribute the load more evenly.

Uses of Chain Blocks

Chain blocks are widely used in:

• Construction sites

• Warehouses

• Manufacturing plants

• Maintenance operations

They are ideal in settings where:

• Lifting is too heavy or unsafe to be done manually.

• Electricity is unavailable.

• A single person needs to lift or lower equipment with precision.

Examples include:

• Installing or removing motors

• Lifting equipment into tight spaces

• Positioning items on assembly lines or conveyor belts

Chain Block vs. Chain Hoist

• A chain block refers specifically to a manual lifting device.

• A chain hoist may refer to either a manual or electric lifting system.

While the terms are often used interchangeably, the distinction matters when choosing between power-assisted and manual lifting options.

Advantages of Chain Blocks

✅ No Power Required – Ideal for remote or power-limited areas
✅ Easy to Operate – Designed for one-person use
✅ Portable – Compact and easy to transport
✅ Cost-Effective – Lower initial and maintenance costs
✅ Low Maintenance – Fewer moving parts compared to electric hoists

Expert Tips for Buying a Chain Block

• Choose a chain block with a safe working load (SWL) appropriate for your tasks.

• Prioritize models with overload protection for safety.

• Avoid units that use non-standard chain sizes to reduce replacement costs and downtime.

• Invest in trusted brands that offer good durability and reliable support.

Our Range of Manual Chain Blocks

At RGM Cranes, we offer a wide selection of manual chain blocks with capacities ranging from 250 kg to 30 tonnes. Our products feature:

• Galvanized load chains

• Corrosion-resistant stainless steel housing

• Reliable mechanical safety brakes

• Compact, durable construction