#hook blocks

As a crane driver, the bottom hook block is one of the parts you come into contact with the most every day, and its safety directly affects the safety of your operations. According to statistics, 30% of crane accidents are related to damage or improper use of the hook. Therefore, daily checks are essential!

Today, we have compiled 7 key actions for daily checks on hooks to help drivers quickly identify hidden dangers and ensure operational safety.

Check the surface cracks of the hook (visually + touch) ✅ Correct operation:

Observe whether there are cracks, deformation or rust on the surface of the hook.

Focus on checking the bending part of the hook (stress concentration area).

Touch it with your hand to feel whether there are abnormal bumps or cracks.

❌ Danger signal:

If cracks or severe deformation are found → Stop using and replace immediately!

Severe rust (affecting strength) → Need to remove rust and evaluate whether to scrap

Test the flexibility of the hook rotation ✅ Correct operation:

Turn the hook gently by hand to check whether it is smooth.

Observe whether the bearing or pulley (if any) is stuck.

❌ Danger signal:

Difficult rotation → Possible lack of oil or bearing damage.

Abnormal noise → Internal parts are worn and need to be disassembled for inspection.

Maintenance advice: Add grease regularly to keep the hook flexible.

Check if the safety latch is normal ✅ Correct operation:

Open and close the latch manually to confirm that the spring rebounds strongly.

Check the wear of the latch to ensure that it can close automatically.

❌ Danger signal:

The latch cannot close automatically → Do not use!

The latch is deformed or worn beyond the limit → Replacement is required.

Failure of the safety latch of the Bottom Hook Block may cause the hanging object to fall off, so it must be strictly checked!

Check the connection between the wire rope and the hook ✅ Correct operation:

Confirm that the shackle or pressure plate is not loose or cracked.

Check whether the wire rope is broken or worn (especially near the hook).

❌ Danger signal:

The shackle bolt is loose → tighten immediately.

The wire rope has excessive broken wires → replace with a new rope.

Maintenance tips: The connection of the Bottom Hook Block should be fully inspected once a month.

Observe the wear mark of the hook ✅ Correct operation:

Check the wear limit mark on the hook (if any).

Measure the thickness of the hook tip, and it is safe if the wear is ≤5%.

❌ Danger signal:

The hook tip is worn thin → the load-bearing capacity is reduced and needs to be replaced.

No wear mark → It is recommended to contact the manufacturer to confirm the standard.