Understanding Reamers: Types and Applications

Reamers are a type of cutting tool used in metalworking to enlarge or finish the inside surface of a hole. They are typically made of hardened steel and have a tapered shape, with a rounded end that is larger than the diameter of the hole being drilled.

Reamers are used in a variety of applications, including:

1. Enlarging existing holes: Reamers can be used to enlarge existing holes to a specific size, either to accommodate a larger fastener or to improve the fit of a component.
2. Finishing holes: Reamers can be used to finish the inside surface of a hole, removing any rough edges or burrs that may have been left behind by the drilling process.
3. Creating countersinks: Reamers can also be used to create countersinks, which are conical holes that are used to accept the head of a screw or bolt.
4. Deburring: Reamers can be used to deburr the inside surface of a hole, removing any sharp edges or burrs that may have been created during the drilling process.

There are different types of reamers available, including:

1. Straight reamers: These are the most common type of reamer and are used for general-purpose applications.
2. Tapered reamers: These reamers have a tapered shape that is larger at the bottom than at the top, and are used to enlarge holes in a specific direction.
3. Ball end reamers: These reamers have a ball-shaped end that is used to finish the inside surface of a hole.
4. Countersink reamers: These reamers have a conical shape and are used to create countersinks.
5. Step reamers: These reamers have a stepped design, with different sizes of cutting edges, and are used to enlarge holes in stages.