What is the purpose of the reaming process?

The reaming process is specifically designed to enlarge or smooth existing holes that have already been drilled or created. This machining operation involves the use of a reamer, which is a multi-fluted cutting tool. By utilizing a reamer, the process not only increases the diameter of the existing hole to more precise dimensions but also improves the hole's surface finish. The result is a hole that meets tight tolerances, which is critical for components where exact fit and alignment are necessary, such as in mechanical assemblies or for threaded applications.

The other options focus on different machining or fabrication processes. Drilling new holes is a primary operation performed with drill bits, while adding decorative patterns does not align with the functional purpose of reaming. Removing excess material from a surface usually pertains to milling or lathe operations rather than reaming, which is dedicated strictly to existing holes.