Drill-Bit Countersink set for Wood – 5pcs with Drill Bits

This Drill-Bit Countersink set for Wood contains countersinks for use with plastic and wood. These countersinks attach to a drill bit so you can drill and countersink holes in one step. They attach to the drill bit with two set screws and the position can be adjusted for different screw lengths. The 90° countersink angle is compatible with the profile of flat- and oval-head metric screws.

Specifications

Countersinks for Screws cut a cone-shaped opening to install screws and rivets flush with a surface or hold workpieces between centers on a lathe. They can also be used for chamfering and deburring. TiN (titanium nitride) coated countersinks last longer and withstand more heat than black-oxide coated or uncoated countersinks. Choose fewer flutes for a faster cut or more flutes for a smoother finish.

Single Flute: The single flute does not vibrate at high speeds hence faster cutting than multiple flutes. These countersinks are often used for cutting smaller holes.
2, 3, or 4 Flutes: Each additional flute increases the tool life by distributing the cutting load over more edges. However, fewer flutes provide better chip clearance when machining stringy materials such as plastic.
Six Flutes: Six flutes remove more material per revolution than countersinks with fewer flutes for a smoother finish and a longer tool life.

Drill-Bit Countersink set for Wood – 5pcs with Drill Bits

The countersink body diameter must be equal to or larger than the head diameter of the screw, center, or rivet being countersunk. Use a pilot hole that’s larger than 10% of the countersink body diameter.

• 60° Countersink Angle—For holding workpieces between the centers on a lathe.
• 82° Countersink Angle—For flat- and oval-head inch screws.
• 90° Countersink Angle—For flat- and oval-head metric screws as well as deburring.
• 100°, 110°, or 120° Countersink Angle—For rivets.

Drill-Bit Countersink for Wood