It is important to know that there are shackles that you are not allowed to hoist with. You use these shackles, for example, to secure something where no force is applied. In this blog, we cover only high-quality shackles that are suitable for hoisting and lifting jobs. Curious? Read on quickly!
- Bow and Dee shackles
Bow and dee shackles come in many shapes, sizes, and workloads. They are often used for hoisting or as a static removable connection between, for example, steel cables. It is significant to know that there are shackles that are not allowed to be lifted (commercial quality, for example, to fix something that does not come with force) and shackles that can be lifted. Shackles with which hoists may be lifted are certified and a clear workload and specifications (such as a brand and CE marking) are stated on it.
The difference between a bow and a dee shackle is the shape of the “roundness”. With a Bow-shackle, there is more space internally than with a Dee-shackle.
High-quality Shackles are made of high-quality steel (Grade 60, galvanized) or stainless steel. We supply shackles that comply with European directives and are optional with a certificate. In this blog, we only deal with (high-quality) Shackles that are suitable for lifting.
- Screw collar pin & Safety bolt
The main difference is the way of fastening the shackle. A distinction is made between a safety bolt and a screw collar pin. You screw a scew collar pin into the shackle itself to tighten, and a safety bolt is put through the shackle and secured with a bolt. The bolt must then be secured with a locking clip so that it cannot come loose. If a shackle must be mounted for a longer period, you should use a shackle with a safety bolt for extra locking.
- Instructions before use
Please note that commercial-quality shackles may not be used for lifting. Choose a shackle whose workload is suitable for the work to be performed. Consider extreme conditions or shock loads.
At a minimum, inspect the shackle for the following:
- All markings must be legible
- The pin and the shackle must belong together and must be identical in terms of dimensions (and of the same brand)
- Make sure that a safety bolt is always secured
- All parts must be undamaged and not deformed
- The shackle is not adjusted and should never have been heated
- Safe use
Make sure that the pin will be fully screwed in and secured (screw collar pin) or that the bolt will be tightened fully and locked (safety bolt). The stated workload of the shackle applies to the straight use of the shackle. If a shackle is used at an angle, the safe workload decreases. Never load a shackle from the side. If a shackle is used to hang 2 parts (for example 2 chains or 2 wire ropes), a bow shackle must always be used, and the inner angle must never exceed 120 degrees.