Why do files have different teeth per inch?

Answer 1

Files have different teeth per inch (TPI) because the TPI determines the file's cutting action and suitability for various materials and applications. A higher TPI provides finer teeth, making the file ideal for smoothing or finishing surfaces, while a lower TPI has coarser teeth that remove material more aggressively, suited for shaping or roughing out. This variation allows users to select the appropriate file for their specific task, whether it be metalworking, woodworking, or other material processing.

Answer 2

Files have different teeth per inch (TPI) to accommodate various materials and desired finishes. A higher TPI means finer teeth, which are better for producing smooth surfaces on softer materials, while a lower TPI has coarser teeth that remove material more quickly, making them suitable for shaping harder materials. The choice of TPI affects the efficiency and outcome of the filing process, allowing users to select the appropriate file based on the task at hand.