What is Turnbuckle

Turnbuckle is a common rigging device that is used to adjust tension and reduce slack in a rope, cable, or similar tensioning assembly.

Parts of a Turnbuckle: 

1.Body: Closed body or open body, closed body turnbuckles—also known as pipe bodies—encase the threads in a closed frame to create a slimmer profile that fits in tighter spaces. Open body turnbuckle is the more traditional type where the threads are visible through the body frame.




2.Nut: the nut can be placed on the threads of the end fittings and tightened against the turnbuckle body to help prevent the device from loosening or unthreading.
3.End fittings: there are three type end fittings: 
Hook end: a hook end fitting is used to create temporary connections because they are easy to quickly connect and disconnect. 
Eye end: an eye end fitting is a closed loop that can be connected to a shackle or quick link. 
Jaw end: a jaw end fitting consists of a jaw and bolt secured together by a nut or a pin. These are used to connect to components that cannot be opened, such as an eye bolt.


4.Thread Diameter: this is the diameter measurement of the threaded portion of the end fittings. The greater the thread diameter is, the greater the load-bearing capacity of the turnbuckle and vice versa.

5.Take-up Length: this is the total length that the end fittings can screw into and out of the body to “take up” tension. Take-up length can be measured in terms of “opened” or “closed” end fittings: the end fittings are either fully extended or fully retracted.