Reamer

What is it?

A reamer is a fluted tool that removes a small, controlled amount of material to enlarge a drilled hole to a precise diameter and smooth finish. It produces the accurate, true holes needed for pins and shafts.

What is it used for?

• Sizing holes to exact tolerances
• Finishing smooth, true bores
• Refining holes for press fits

How to choose

A hand reamer sizes holes accurately for assembly. Choose diameter to the target hole; always ream by hand with steady, even pressure.

Anatomy

Understanding the parts of a reamer helps you use, maintain, and buy it with confidence.

• Body: the main working portion of the tool
• Working end: the part that contacts the material
• Handle: the part you grip for control and leverage

Materials & construction

Quality reamers are made from hardened, heat-treated steel (often chrome-vanadium or high-carbon) chosen for strength, edge retention, and resistance to wear and corrosion.

Safety & maintenance

• Wear safety glasses; metal chips and fragments are sharp
• Use the correct technique and pressure for the material
• Keep the tool clean and store it safely
• Fit a handle where the tool uses one to protect your hand

Also known as

hand reamer, chucking reamer