Are you confused and not able to decide which type of shackle to choose? Don’t worry, in this article, we are going to jot down the difference between the two most widely used shackles. Namely, Anchor shackle/ Bow shackle and Chain shackle/D shackle.
Shackles are used for various rigging and load securing applications.
Choose the right type of shackle for your application.
Anchor shackle/ Bow shackle/ Bolt type bow shackle
Bolt type bow shackle is also known as Anchor shackle or Bow shackle
It has a larger and more defined “o” shaped bow area.
Having a larger bow, these shackles can be loaded in many directions as well as sideloaded and used for connecting multiple sling legs
Chain shackle/ D shackle/ Bolt-type D-shackle
Bolt-type D-shackle is also known as Chain shackle or D shackle
D shaped bow is comparatively narrower than the anchor shackle.
Having a smaller loop area, it can take a high load in a line
Designed for in-line tension, they should not be sideloaded.
While using, the centerline of the load should coincide with the centerline of the shackle
Using shackles safely
Always
- Store and handle shackles correctly.
- Inspect shackles before use and before placing into storage.
- Select the correct pattern of shackle and pin for the application.
- Allow for the full resultant imposed load. • Fully tighten the pin.
- Ensure the load acts through the centre line of the shackle using spacers if necessary to meet this requirement.
Never
- Use shackles with bent pins or deformed bodies.
- Force, hammer or wedge shackles into position.
- Eccentrically load shackles.
- Replace the pin with a bolt.
- Fit pins in contact with moving parts that may loosen or unscrew them.
- Shock load shackles
Inspection and maintenance
Maintenance requirements are not much but it is mandatory to inspect the slings before use.
Keep shackles clean, the threads free of debris and protect from corrosion.
While inspection, if you find the shackles to be distorted, damaged, having cracks, corrosion or any other defects immediately take it to a competent person.
Materials used for making the shackles
- Carbon steel shackles
- Alloy steel shackles
- Galvanized shackles
The process of galvanization adds a layer of zinc oxide to protect against rust and corrosion.
- Stainless steel shackles
Stainless steel shackles are highly corrosion resistant and are ideal for marine applications