Whitworthtråd

Whitworthtråd is a type of thread profile that was developed by British engineer Joseph Whitworth in the 19th century. It is a machine thread used for bolts and nuts, and it is characterized by its square thread profile that matches a V-thread or a "guires" thread. The Whitworth tråd was widely used in the UK and other parts of the world during the Industrial Revolution for its accuracy and durability.

The Whitworth tråd has a distinctive square profile with two symmetrically opposed peaks. The thread is cut at an angle of 55 degrees, which allows it to engage with a V-thread in a mechanical advantage. This feature makes the Whitworth tråd strong against fatigue and allows it to withstand a significant amount of torque.

The Whitworth tråd is designed to fit within a cylindrical hole with a shaft of the same diameter, providing a secure and reliable connection. This design was widely used for machine connections in the industrial era, particularly in the railroad industry, where it was used to secure wheel axles and other critical components.

Although it has largely been replaced by more modern threading systems, such as the Unified Thread Standard, the Whitworth tråd remains in use for specific purposes where legacy equipment or custom applications demand its use. It is still used for some restoration work, to maintain historical equipment and machinery, or for use in custom applications where precise and traditional threading is a requirement.