Which operation is performed to produce a smooth interior bore after drilling?

Which operation is performed to produce a smooth interior bore after drilling?

• A. Reaming
• B. Honing
• C. Boring
• D. Deburring

Answer: (A)

Reaming is used to produce a smooth interior bore after drilling. Drilled holes are typically rough and slightly oversize, so a reamer, with its sharp, multiple-cutting edges, removes a small amount of material to bring the hole to an exact diameter and a much smoother surface. This step tightens the size tolerance and improves roundness without significantly enlarging the bore. Deburring only removes sharp edges and burrs, not the bore’s finish. Boring can size or true a hole but is more about correcting or enlarging a hole than achieving the final smooth finish from drilling. Honing achieves an ultra-smooth, precise surface and is usually done after boring or reaming for fine finishes, not as the immediate finish after drilling.

Reaming is used to produce a smooth interior bore after drilling. Drilled holes are typically rough and slightly oversize, so a reamer, with its sharp, multiple-cutting edges, removes a small amount of material to bring the hole to an exact diameter and a much smoother surface. This step tightens the size tolerance and improves roundness without significantly enlarging the bore. Deburring only removes sharp edges and burrs, not the bore’s finish. Boring can size or true a hole but is more about correcting or enlarging a hole than achieving the final smooth finish from drilling. Honing achieves an ultra-smooth, precise surface and is usually done after boring or reaming for fine finishes, not as the immediate finish after drilling.