How is Taper Per Inch calculated?

The calculation for Taper Per Inch is based on the concept of measuring the change in diameter over a certain length. To determine the taper per inch, you take the difference between the larger diameter and the smaller diameter, which gives you the total taper over the specified length. Dividing this difference by the length allows you to find out how much taper occurs per inch. This is crucial for precision in machining and layout work, ensuring that tapered sections fit correctly and function as intended in assemblies.

In the context of the other options, they do not provide the correct method for calculating taper per inch, as they either add diameters or provide incorrect formulations that do not account for the necessary division by length, which is essential for finding the taper per inch accurately.