Shackle, it is one of the rigging, is widely used, especially in electric power, metallurgy, petroleum, machinery, railway, chemical industry, ports, mining, construction and other industries. General shackle size are small, but the weight capacity is big. Here, from several aspects to introduce specific shackle the rigging.

Classification of 1.

Shackle can be divided into national standard, American standard, Japanese standard these three categories, including American standard is the most commonly used.

2. The safety factor

The safety factor of the shackle has four times, five times, six times and 8 times.

3. The material

Shackle made of carbon steel, alloy steel, stainless steel and high strength steel, etc.

4. General requirements

(1) the shackle surface should be smooth level off, without quality defects such as cracks, sharp edges, burnt.

(2) fastenings manufacturing should be chosen when killed steel, cannot use cast iron or cast steel,

(3) on the shackle to drilling and repairing welding, fastenings and the shaft pin in the event of permanent deformation, will not be repaired.

(4) the fastenings and the shaft pin should be checked before use, cannot appear serious wear, deformation and fatigue crack, cannot use.

(5) the shackle should strictly abide by the rated load when using, cannot too frequent use or overload use; And the transverse spacing cannot be subject to tension, should be pressed the latch.

(6) shaft pin after assembled, buckle width should be no reduction in the body, screw thread should be connected well.

5. Inspection

(1) you can use a magnifying glass to shackle in the process of reviewing for defects.

(2) test should with double safety when load as the test load, shackle sampling reliability test can be performed.

(3) the shaft pin there can be no permanent deformation, loosen after can free rotation. Shackle cannot appear rupture, or affect the deformation of the bearing capacity.

(4) accounting body should show strength grade and the safety load on tag.

6. Scrap standard

(1) a significant permanent deformation, or shaft pin rotation is not flexible.

(2) button on the body and the shaft pin any cross section of the wear volume for more than 10% of the original size.

(3) the shackle, cracks, or can't latch, or the test result is unqualified.