1. What is a Universal Swivel Hoist Ring?
A Universal Swivel Hoist Ring is a lifting tool commonly used in lifting operations, designed to allow the load to rotate freely within a 360-degree range during lifting. It is typically made from metal materials such as steel, and includes a ring that can rotate around its central axis. The main purpose of the swivel hoist ring is to facilitate the rotation and adjustment of the load's direction during lifting without generating excessive friction or causing damage.
2. Universal Swivel Hoist Ring Product Features and Advantages
1) Unique Ball Bearing Design: The lifting point can rotate 360° and tilt up to 230° during lifting.
2) Maximum Load in Vertical Lifting Direction: The hoist ring achieves its highest load capacity in the vertical lifting direction.
3) 4x Safety Factor: Ensures a 4-fold safety factor under any direction of applied load.
4) Rotates Under Rated Load: The hoist ring can rotate under full load and continue to rotate durably when fully loaded.
5) Hexagonal Design for Easy Installation and Removal: The hexagonal base design allows for easy installation and disassembly.
6) High-Strength Ring Body: Tested according to the European Union EN1677-4 standards.
3. Applications
Universal Swivel Hoist Rings are widely used in industries such as factory production lines, construction sites, port lifting, wind turbine installation, and oil & gas platforms. They are particularly suitable for complex lifting operations that require adjusting the angle or direction of the load during the lifting process.
4. Selection Principles and Usage Notes
1）Load Application and Effective Thread Length:
The material connected to the swivel hoist ring must have sufficient strength to resist forces during lifting. The recommended effective thread length is calculated based on the material of the load:
For general steel/carbon steel: 1.5 x M
For cast iron: 1.8 or 1.5 x M
For aluminum alloys: 2 x M
For aluminum-magnesium alloys: 2.5 x M (M = diameter of the swivel hoist ring bolt, e.g., M20)
2）Rotational Torque of the Swivel Hoist Ring:
① The swivel hoist ring can rotate 360°. For short-term use, a wrench can be used to tighten the nut. For long-term use, a torque wrench should be used to tighten it according to the recommended torque (+/- 10%).
② If the working environment involves continuous rotation, regularly check the bolt torque to ensure it meets the recommended value.
3）Bolt Fixation:
If the load being lifted is subject to intermittent (or continuous) vibrations or movement, it is recommended to inject LOCTITE 2701 glue into the bolt hole to ensure that the bolt remains securely fastened.
4）Permissible Load Direction:
① Before using the swivel hoist ring, check whether it is applied in the correct direction and ensure the ring can rotate smoothly without any obstruction from the load.
② All accessories used in conjunction with the swivel hoist ring should also move freely. When assembling or unloading lifting slings (chain slings), avoid collisions or squeezing, and prevent damage from adjacent objects.
5)Environmental Factors:
① According to DIN/EN standards, the working load capacity of the hoist ring and bolt may be reduced by temperature changes. If the temperature returns to normal, the working load will return to normal as well.
② The hoist ring should not be used in high or low temperature environments. It should not be used in chemical environments such as acids, alkaline solutions, or high-temperature steam environments. If this is unavoidable, contact the manufacturer to evaluate the chemical concentration, temperature, and other environmental factors.
③ It is recommended to mark the hoist ring's installation position with color for easy identification by operators.
After each use, the hoist ring should undergo regular inspections by qualified personnel to check for any damage or defects.
5. Installation and Removal
Before starting the lifting operation, confirm the weight of the load, the lifting angle, and the number of hoist rings. Ensure that the load weight is within the hoist ring’s safe working load.
1）The lifting operation should be performed by qualified personnel.
2）Ensure that the bolt and the threaded hole in the load are clean, free of debris, and undamaged. Verify that the bolt specifications match the threaded hole.
3）Before use, check the bolt torque using a torque wrench to ensure it reaches the recommended value.
4）Ensure that there are no washers, spacers, or other objects between the hoist ring and the load. If present, remove them before use.
5）Make sure the hoist ring base fits tightly against the surface of the load.
6. Maintenance and Care
1）The hoist ring is CE certified as a safety lifting device, according to EU EN1677 standards.
2）Do not overload: Lifting capacity must strictly adhere to the specified limits (see lifting plan parameters or the hoist ring's rated capacity on the body).
3）The hoist ring bolt must be fully tightened, with no gap between the hoist ring and the mold (equipment/part). Do not use washers between the hoist ring and the load.
4）The effective length of the bolt should be at least 1.5 times the bolt diameter (e.g., for M10, the bolt length should be 15mm).
5）Regularly inspect the hoist ring for wear and tear. According to EU EN1677 standards, replace the hoist ring if the wear on the hook exceeds 1/10th of its thickness.
6）Do not replace bolts with non-original bolts.
7）Avoid throwing, dropping, striking, or stacking the hoist rings in bulk.
8）Regularly lubricate and maintain the hoist ring. Be attentive to other daily maintenance details.
By following these guidelines and recommendations, you can ensure the safe and efficient operation of the Universal Swivel Hoist Ring in various lifting applications.
