Reamers & Countersinks

We offer a comprehensive range of Dormer branded hand and machine reamers to support production of dimensionally accurate holes up to H7 tolerance.

Our reamers are classified into 3 main types:

•   Solid: available in two shank types – straight (cylindrical) - either with or without square, and, Morse Taper
•   Shell: for use on arbors
•   Expanding: with adjustable HSS blades and used for light work

The most common types of reamers have a left-hand spiral due to the cutting forces involved and low depths of cut. This is a proven geometry to provide a high quality surface finish and hole accuracy.

Straight flute reamers are also available for hard and abrasive workpiece materials.

In addition, we manufacture a range of Countersinks for chamfering and countersinking holes. Dormer’s countersink range includes a variety of substrates, coatings and shank options to suit the majority of applications:

We also offer conical drills and counterbores.

Dormer’s Reamer and Countersink ranges are identified by the following product codes:

•   B*** (HSS, HSS-E & Solid Carbide Reamers)
•   G*** (HSS, HSS-E & Solid Carbide Countersinks)

Below you can find some highlights from our reaming & countersinking program. For more information or to view our complete range, please download the Dormer catalog

​Reamers Countersinks


For pricing and availability please visit the Dormer Pramet eShop or contact your local sales office