What is the difference between high-quality and low-quality shackles? Technicians have specifically tested these two types of shackles and obtained an astonishing result. The difference between them is not as simple as you imagine. Let's take a look below.

The testing equipment used is an advanced large-scale tensile testing machine. The testing method is very simple, which is to continuously apply tension to the shackle until it completely breaks. At this time, the limit value of the shackle fracture is recorded and then compared. The test site used a shackle with a rated load of only 4.75 tons.

The first step is to test high-quality shackles. As the tension of the tensile testing machine continues to increase, this shackle with a rated load of only 4.75 tons can withstand 30 tons of tension until it reaches 35 tons before completely breaking, which is more than 7 times its rated load.

Next is the testing of inferior shackles, which are also rated at 4.75 tons. With the continuous increase of tension value, the inferior shackles were broken in just a short time. What is even more disappointing is that the inferior shackles only withstood the test of 4.4 tons, which means that there is no safety guarantee for lifting and hoisting within the rated load.

This is the difference between low-quality and high-quality shackles, so don't think there isn't much difference between them. When choosing a shackle, you must be careful and avoid choosing inferior products.