Manual Chain Hoists: Features and Applications

Technical Specifications

Manual chain hoists are capable of lifting loads up to 10 tons to heights ranging from 3 to 18 meters. Their compact and portable design offers autonomy and flexibility, making them ideal for both small and heavy-duty applications.

Advantages of Manual Hoists

• Mobility: Easy to move between different work sites.
• Cost-Effective: No energy costs and minimal maintenance expenses.
• Autonomy: Operates independently without the need for a power grid connection.
• Affordability: Low purchase cost and long service life.

Design and Operation

A manual chain hoist operates on a pulley block system with interconnected blocks, a gear system, and a drive mechanism. The gear system is driven by a chain that amplifies the force applied, making lifting easier. It includes a disc brake for safety and a steel hook for securing loads.

Gear Hoist Design Features

Gear hoists are more productive than lever hoists, with a lifting capacity of up to 10 tons and a maximum height of 18 meters. They are simple, convenient mechanical devices suitable for warehouses, garages, and construction sites.

Operational Mechanism

Gear hoists consist of two chains: a load chain with a hook for securing the load and a drive chain operated by the user. The drive chain passes through gears, multiplying the force applied and transferring it to the load chain.

Safety Precautions

Using manual chain hoists requires adherence to safety guidelines to prevent accidents and equipment failure:

• Regularly inspect chains for damage.
• Do not use hoists to lift people.
• Avoid using multiple hoists simultaneously for a single load.
• Keep people away from raised loads.
• Do not operate with the chain detached.
• Avoid leaving loads in a raised position for extended periods.
• Lift loads smoothly without sudden movements.
• Never exceed the maximum load weight specified in the technical manual.
• Ensure loads are securely fastened before lifting.

Selection Criteria

When choosing a manual chain hoist, consider the load capacity, lifting height, and hoist weight. Different industries may require different capacities, and the lifting height is determined by chain length.

Applications

Manual chain hoists are versatile and can be used in various settings:

• In construction for lifting materials.
• In automotive repair for handling heavy parts.
• In industrial workshops for equipment installation and dismantling.
• In trade for servicing warehouses and wholesale bases.
• On railways for loading and unloading operations.

Extending Service Life

The body and main mechanisms of hand hoists are made of structural steel. To extend their service life, it's crucial to address any damage promptly and apply anti-corrosion measures as needed.

By understanding the features, applications, and safety measures of manual chain hoists, users can optimize their lifting operations and ensure a long service life for their equipment.