When using a file, which stroke should pressure not be applied to?

When using a file, it is important to apply pressure correctly to maximize efficiency and maintain the tool's effectiveness. The correct approach is to apply pressure on the forward stroke, which is when the file is cutting into the material. During the return stroke, however, no pressure should be applied. This is because the primary purpose of the return stroke is to reposition the file for the next cutting motion, rather than to remove material. Applying pressure on the return stroke can lead to uneven surfaces, damage to the file, or excessive wear.

In contrast to this technique, using a circular motion or a back-and-forth motion with a file is not conventional and often leads to inefficient material removal and can compromise the effectiveness of the filing process. Thus, avoiding pressure on the return stroke is crucial for achieving optimal results while preserving the integrity of both the workpiece and the tool.