A steady rest is a device used on a lathe machine to support long, slender, or flexible workpieces during the turning process. It is designed to hold the workpiece steady and prevent it from vibrating or bending during machining.

A steady rest typically consists of a base that attaches to the lathe’s bed, and one or more arms that extend out to hold the workpiece. The arms can be adjusted to the size of the workpiece and locked in place to provide a secure hold. Some steady rests have adjustable fingers that can be positioned to hold the workpiece in specific locations.

Steady rests are particularly useful for turning long, thin shafts, such as those used in the aerospace, automotive, and power transmission industries. They can also be used to support flexible workpieces, such as wire or tubing, during turning operations.

The use of a steady rest can improve the quality of the finished part by reducing vibrations and ensuring that the workpiece is held in the correct position. It also allows for better machining precision, and longer tool life by reducing the vibration.

Overall, the steady rest is a device used on a lathe machine to support long, slender, or flexible workpieces during the turning process. Its use can greatly improve the quality of the finished part by reducing vibrations, ensuring that the workpiece is held in the correct position, and allowing for better machining precision and longer tool life.