Sanyi metal analysis of the general requirements of shackle 1, shackle should be smooth and smooth, not allowed to crack, sharp edge, burned and other defects.

2, is strictly prohibited to use cast iron or cast steel shackles. Button body can be used forging steel forging, shaft pin can be bar forging after machining.

3, should not be on the shackle drilling or welding repair. The body and the pin are permanently deformed and can not be repaired.

4, when used, should check the button body and the pin, not serious wear, deformation and fatigue cracks.

5, when used, the horizontal spacing shall not be pulled, the pin must be plugged into a good insurance pin.

6, the correct pin assembly, the button body width shall not be significantly reduced, good thread connection.

7, the use of shackles shall not exceed the specified safety load.