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Shackle Test

Jul 04, 2018

1. It should be smooth and flat, and there should be no defects such as cracks, sharp edges and over-burning. The suspect area can be reviewed by means of a magnifying glass.

2. The shackle is tested with a double safety load as the test load. The axle pin must not be permanently deformed and can be freely rotated after being loosened. The increase in the length of the button body shall not exceed 0.25% or 0.5 mm. A test load of 2 times the safety load of 300 tons or less is tested as a test load, and a safety load of 1.33 times or more is tested as a test load.

3. The shackle can be used for sampling reliability test. The load is twice the test load. The shackle shall not deform or cause the shackle to lose its load carrying capacity.

4. The safety load of the current shackle is approved by M(4).

5. Markings on the button body should be marked with strength level and safety load.

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