When using a belt/disc sander, what should be used to prevent the sander from throwing the stock?

Using a stop is crucial when working with a belt/disc sander because it ensures that the material being worked on is held securely in place during the sanding process. The stop acts as a physical barrier that prevents the stock from being thrown by the motion of the sander, which can occur due to the aggressive nature of sanding and the high speeds involved. By providing a consistent reference point, the stop keeps the material correctly aligned and stabilized, allowing for a safer and more precise sanding operation.

While other tools like push sticks or clamps are useful in various woodworking and sanding applications, their primary functions differ. Push sticks are usually employed to help guide small pieces of wood through the machine, reducing the risk of hands getting too close to the sanding surface. Clamps may secure the material but are less effective in ensuring the material remains stationary against the sander's surface under pressure. This highlights why a stop serves the specific purpose of preventing movement and enhancing safety in this scenario.