When operating with elebia automatic hooks, you may occasionally notice that the hook appears to open slightly during use. Understanding the design and functionality of these hooks can help clarify this phenomenon and ensure safe operations.
Understanding the Hook's Geometry and Safety Design
The elebia automatic hooks are ingeniously designed to prevent opening under load. When a load is properly seated in the bowl (the curved inner section of the hook), the hook's geometry works to keep it securely closed. The weight and position of the load actually help maintain this closure. Additionally, an electric motor brake engages whenever the battery is inserted, providing an extra layer of security by physically constraining the hook's movement, preventing it from drifting open even when unloaded. This applies to hooks evo5 through evo25. For evo2 hooks and the NEO range, there is a safety mechanism that prevents the hook from opening or closing involuntarily via the lockpin. .
Why the Hook Appears to Open Slightly — The Two Root Causes
1. Load Not Seated in the Bowl
The most common reason for the hook appearing to open is that the load is resting on the tip of the hook rather than in the bowl. This reverses the force geometry, causing the load to push the hook towards opening. Before lifting, always ensure that the load is seated correctly in the bowl to avoid this issue.
2. Crane Misalignment
Another contributing factor is when the crane is not vertically aligned with the lifting point. This misalignment introduces lateral forces that can cause the hook to open slightly. Always check that the crane is centered directly above the load before proceeding with the lift.
If both conditions are satisfied—load seated in the bowl and crane vertically aligned—the hook will remain securely closed.
Red LEDs and eMAX Alerts: Not the Same as Opening
Operators may notice red LEDs and an eMAX alert during a lift, which can be mistaken for the hook opening. This alert is triggered when the hook is in a tilted or horizontal position, indicating that the hook is not fully closed. This is a safety feature designed to alert operators to adjust the hook's position.
Manual Opening of the Hook
It is normal for the hook to be manually opened by hand for emergency purposes. However, if the hook feels completely loose without any resistance, this may indicate an issue. Check the following:
- Motor brake: Possible motor brake not activated: Recommended only for models evo5 to evo25.
- Clutch Condition: A worn or slipping clutch may not provide enough resistance during opening.
- Calibration: If the hook has not been calibrated correctly, it may not function as intended. Recalibrate if necessary.
Checklist When the Hook Appears to Open
Before assuming a mechanical fault, verify the following:
1. Was the load correctly seated in the bowl, not on the tip?
2. Was the crane vertically aligned with the lifting point?
3. Does the hook complete its full travel and beep twice after each opening or closing?
If all checks are confirmed and the hook still appears to open during a normal lift, please open a support ticket and include a video of the operation for further assistance.
By following these guidelines, you can ensure safe and effective use of your elebia automatic hooks. If you have any further questions or need assistance, please don't hesitate to reach out to our support team!