1, shackle should be smooth, not allowed to have defects such as cracks, sharp edges, burning.
2, prohibited the use of cast iron or cast steel shackles. Buckle can be used steel forgings, shaft pin rods machined after forging.
3, should not shackle any drilling or welding repair. Button and PIN after the permanent deformation shall not be repaired.
4, when used, should check the buckles and latches, no excessive wear, deformation and fatigue cracks.
5, when using horizontal spacing must not be allowed to pull PIN must be inserted the PIN.
6, shaft after correct installation, buckle width shall not be significantly reduced in the body, threaded connection is good.
7, the use shall not exceed the safe load shackles.