The eye hoist hook should pay attention to the environmental conditions when it is used in conjunction with the rigging, and the rigging should not be twisted and knotted. During the lifting process of the hook, the articles that are strictly forbidden to be lifted are collided and impacted.
At present, eye hoist hook is generally forged single hook, casting hook is not allowed to be used in cranes, eye hoist hook is widely made of low carbon steel and carbon alloy steel.
The hook plays the role of connecting cranes and heavy objects, so we must pay attention to its maintenance. Therefore, when the lifting height limiter or the locking device of the hook fails or is damaged, it is absolutely not allowed to be used again. In order to ensure safety, the hook should be inspected and scrapped when one of the following circumstances is found.
1、Cracks appeared.2、The degree of openness has increased by 15%. Torsional deformation exceeds 10 degrees.3、Plastic deformation occurs in the dangerous part or neck of the hook. When the wear of the hook sleeve reaches 50% of the original size, the core sleeve should be scrapped. When the wear of plate hook core shaft reaches 5% of the original size, it will be discarded.
It must also be noted that the above defects of the hook should not be welded
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