What Is a Counterbore?
A counterbore creates a flat-bottom recess for a fastener head or component.
Counterbores: selection checklist
- Match the pilot and diameter to the fastener.
- Confirm the required depth.
- Keep the tool aligned to avoid an uneven recess.
How to choose the right option
- Confirm the job specification and machine interface.
- Select the correct size, geometry and material.
- Review the product details and related accessories before ordering.
Shop the recommended collections
- Counterbores for Hole Preparation
- Drills for Professional Work
- Drill America Cutting Tools
- Steel Cutting Tools Tools for Metal Drilling Tools & Drill Bits
- Reamers, Countersinks & Hole Finishing Tools
Products to compare
- Drill America DEWA/CCBR1 1 in x 3/16 in HSS Aircraft Counterbore — 1/4 in Shank
- Drill America DEWA/CCBR1/2 1/2 in x 1/8 in HSS Aircraft Counterbore — 1/4 in Shank
- Drill America DEWA/CCBR1/4 1/4 in x 3/32 in HSS Aircraft Counterbore — 1/4 in Shank
- Drill America DEWA/CCBR11/16 11/16 in x 3/16 in HSS Aircraft Counterbore — 1/4 in Shank
- Drill America DEWA/CCBR11/32 11/32 in x 3/32 in HSS Aircraft Counterbore — 1/4 in Shank
- Drill America DEWA/CCBR13/16 13/16 in x 3/16 in HSS Aircraft Counterbore — 1/4 in Shank
- Drill America DEWA/CCBR13/32 13/32 in x 1/8 in HSS Aircraft Counterbore — 1/4 in Shank
- Drill America DEWA/CCBR15/16 15/16 in x 3/16 in HSS Aircraft Counterbore — 1/4 in Shank
Continue learning
For production quantities, unusual sizes or help selecting the correct tool, request a quote from Cutting Tools Outlet.