Drilling is performed to originate a hole on a solid surface. Reaming is performed to finish internal surface of an existing hole. ... So reaming is performed only after drilling (or boring). Cutting tool used in drilling operation is called Drill.

What is reaming in drilling?

1. vb. [Drilling] To enlarge a wellbore. Reaming may be necessary for several reasons. Perhaps the most common reason for reaming a section of a hole is that the hole was not drilled as large as it should have been at the outset.

What is the difference between a drill bit and a reamer?

Like drill bits, reamers also remove material from the workpiece on which they are used. However, reamers remove significantly less material than drill bits. The primary purpose of reaming is simply to create smooth walls in an existing hole.