What does TPF stand for in machining?

TPF stands for Taper Per Foot in machining. This term is important because it relates to the precision and specifications of tapered components being manufactured. In many machining applications, especially in processes involving drilling, reaming, or turning, it is crucial to understand taper measurements as they define how much a diameter changes over a certain distance. This is essential for fit and assembly purposes, ensuring parts can securely connect or align as intended.

The other options refer to concepts that, while relevant to various aspects of machining and engineering, do not specifically concern the measurement of taper. Taper Per Foot explicitly addresses the changing diameter over a linear distance, which is critical in ensuring the proper geometric characteristics of tapered parts.