In various industries, there are applications that require high lifting precision — whether placing a heavy load in a specific location, handling relatively small weights, or managing very large loads that demand strong and reliable components. This raises the question: Which is better suited for your application – a single-reeved or a double-reeved hoist?
What is True Vertical Lift?
True vertical lift means the hook can move straight up and down without any horizontal drift. This feature is crucial in precise applications, such as assembly operations where the load must be positioned exactly in place.
Single-Reeved Hoists
- Use a single rope wound around the drum.
- Because of the rope winding on the drum, a small amount of hook drift occurs.
- With advanced drum designs (such as large-diameter drums), this drift can be significantly reduced.
- Suitable for applications up to 40 tons, especially where absolute precision is not critical and the operator can guide the load in the final positioning.
- Economic advantage: 20–25% lower initial cost and 40–50% lower maintenance cost due to reduced rope wear.
Double-Reeved Hoists
- Use two rope parts that wrap onto the drum from opposite directions.
- This mechanism eliminates hook drift completely, achieving 100% true vertical lift.
- Ideal for applications requiring very high precision or heavy lifting capacities.
- Cover load ranges from 4 tons up to 80 tons.
When to Choose Each Type?
- Single-Reeved: Best for light to medium loads (up to 40 tons) where precision is required but not critical, with the benefit of lower cost and a more compact design.
- Double-Reeved: Best for heavy loads (over 40 tons) or in projects that demand extremely high lifting accuracy.
Conclusion
If your application does not require absolute precision and falls within 40 tons capacity, a Single-Reeved hoist can be the most cost-effective and maintenance-friendly solution. However, if your operations demand extreme precision or very heavy lifting, the optimal choice is a Double-Reeved hoist.
