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

Using a reamer entails a specific technique to achieve the desired precision and finish in a drilled hole. In this procedure, it's essential to turn the reamer only in the cutting direction. This method ensures that the cutting edges of the reamer effectively shave the material uniformly and cleanly, resulting in a smooth, accurately sized hole. Turning the reamer in the wrong direction could cause damage to both the reamer and the workpiece, possibly leading to poor hole quality or even tool breakage.

Employing excessive force while reaming is counterproductive because it can lead to tool wear and poor results. Reaming should be a controlled process where consistent but gentle pressure allows for the reamer to do its job effectively. Reaming at an angle would not yield a straight hole, potentially introducing errors and making subsequent fastener placements difficult. Finally, reaming in both directions is unnecessary and can introduce issues such as misalignment or uneven cutting surfaces. Therefore, following the proper reaming direction is crucial for achieving the desired diameter and finish.