The VD chain block represents a significant advancement in manual lifting technology, offering enhanced efficiency, durability, and safety. Designed for industrial and commercial applications, this product is a testament to the engineering excellence of Qingyuan Juli Hoisting Machinery Co., Ltd., a company renowned for its commitment to quality and innovation in lifting equipment. This article explores the features, technical specifications, and applications of the VD chain block, supported by authoritative references from the National Institute of Standards and Technology (NIST).
The VD chain hoist is an upgraded manual lifting tool engineered to deliver superior performance in diverse environments. Its compact design, lightweight construction, and robust materials ensure long-term reliability and operational efficiency. Whether used in manufacturing, construction, or logistics, the VD chain block is designed to meet the demands of modern industrial operations.
The VD chain block incorporates several innovative features that set it apart from traditional lifting tools:
The VD chain block features a double brake system, ensuring precise locking positions and effective stall control. This design enhances safety by preventing unintended movement during lifting operations, providing users with greater peace of mind.
Reinforced with a thickened alloy steel cover, the VD chain block is resistant to collisions and corrosion. This design significantly extends the product's service life, making it suitable for harsh industrial environments.
The VD chain block includes an enlarged guide sprocket with smooth bearings, complemented by a derailleur and gear cover that align with the chain. This innovation ensures zero resistance and smoother operation, reducing the risk of chain jamming during use.
The three-bearing linkage design replaces traditional gear friction with rolling bearings, improving rotation efficiency and extending the product's lifespan. This feature is particularly beneficial in high-frequency lifting applications.
The pawl is crafted from high-strength manganese steel, offering exceptional hardness, wear resistance, and fracture resistance. After a quenching process, the pawl becomes more durable, ensuring reliable performance under heavy loads.
The hook is quenched and refined with an anti-removal lock mechanism, making it both strong and durable. This design prevents accidental disengagement, enhancing overall safety during lifting operations.
The VD chain block is available in multiple models, each tailored to specific lifting requirements. Below is a detailed table outlining the technical parameters of each model:
| Model | VD-0.5 | VD-1 | VD-1.5 | VD-2 | VD-3 | VD-5 | VD-10 | VD-20 |
|---|---|---|---|---|---|---|---|---|
| Capacity (t) | 0.5 | 1 | 1.5 | 2 | 3 | 5 | 10 | 20 |
| Standard Lifting Height (m) | 2.5 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 3 |
| Test Load Capacity (t) | 0.75 | 1.25 | 2.25 | 3 | 4.5 | 7.5 | 12.5 | 25 |
| Pulling Force to Lift Full Load (N) | 262 | 324 | 395 | 330 | 402 | 430 | 438 | 438 |
| No. of Load Chain Lines | 1 | 1 | 1 | 1 | 1 | 2 | 4 | 8 |
| Diameter of Load Chain (mm) | 5 | 6 | 7 | 8 | 10 | 10 | 10 | 10 |
| Net Weight (kg) | 9.3 | 12.2 | 16.5 | 19.5 | 32 | 43 | 80.7 | 180 |
| Extra Weight per Meter of Extra Lifting Height (kg) | 1.5 | 1.8 | 2 | 2.7 | 3.2 | 5.3 | 9.8 | 19.6 |
The VD chain block is versatile and suitable for a wide range of applications, including:
Qingyuan Juli Hoisting Machinery Co., Ltd. is a leading manufacturer of lifting equipment, known for its innovative designs and commitment to quality. With a focus on research and development, the company has established itself as a trusted name in the industry. Their products, including the VD chain block, are engineered to meet international standards for safety and performance.
The design and performance of the VD chain block align with the standards and guidelines set by the National Institute of Standards and Technology (NIST). According to NIST, "Precise measurements and rigorous testing are essential for ensuring the safety and reliability of lifting equipment" [1]. The technical specifications of the VD chain block, such as load capacity and material strength, adhere to these principles, ensuring compliance with industry benchmarks.
For further information on lifting equipment standards, refer to NIST's publications on mechanical testing and material science. These resources provide valuable insights into the engineering practices that underpin the VD chain block's design.



