Tooling Overview
Counterboring
eMachineShop has a variety of counterbore tooling to complement our full range of CNC machining equipment.
- 50+ Materials.
- FREE Shipping in the USA.
- 100% Quality Guaranteed.
As Seen In:

What is Counterboring?
Counterboring creates a cylindrical recess around a hole, widening it to a limited depth. Counterboring is commonly used to allow socket head cap screws sit to below a part’s surface. Surfaces that are rough or curved can also be counterbored to allow a fastener head to flush with the surface.