Which device travels with the cutting tool on a lathe machine to prevent workpiece springing away?

The device that travels with the cutting tool on a lathe machine to prevent the workpiece from springing away is known as the follower rest. This component is crucial in maintaining stability and accuracy during the machining process, especially when dealing with longer, slender workpieces that are prone to deflection under cutting forces.

When a cutting tool engages with the workpiece, especially during deeper cuts, the forces involved can cause the workpiece to flex or "spring" away from the cutting tool if it's not adequately supported. The follower rest essentially provides additional support at a strategic point along the length of the workpiece, thereby minimizing the risk of deflection and ensuring that the tool remains properly aligned with the workpiece throughout the machining process.

This enhancement of rigidity allows for more precise cutting operations, resulting in improved surface finishes and dimensional accuracy. While other devices may play roles in clamping, support, or movement within the lathe system, the follower rest directly addresses the specific challenge of workpiece stability during cutting.