What is the correct procedure when using a reamer to finish a drilled hole?

The correct procedure when using a reamer to finish a drilled hole is to turn the reamer only in the cutting direction. This ensures that the cutting edges of the reamer effectively remove material from the walls of the hole, resulting in a smooth and accurate finish. Reamers are designed with specific cutting edges that are optimized for one-way rotation; turning them in the direction of cutting allows the tool to function properly and helps to maintain the integrity of both the tool and the workpiece.

Utilizing the reamer in the wrong direction can lead to ineffective cutting, increased wear on the tool, and possible damage to the hole being worked on. If the reamer were turned in any direction, it could create shape inconsistencies in the hole, which defeats the purpose of reaming. Similarly, turning the reamer slowly while pulling out could interrupt the cutting process and might not adequately finish the hole, while turning it counterclockwise might cause the reamer to bind or shatter, compromising safety and performance.