CNC-K™ Precision Countersinks

Designed for CNC and NC Machining Applications

Precision for Automated Machining

CNC-K countersinks are specifically engineered for the demands of CNC and NC machining centers.

Unlike standard countersinks, CNC-K tools feature tighter tolerances on all critical dimensions including body diameter, shank diameter, and included angle. This precision ensures consistent countersink depth and diameter in automated production environments.

Tight Tolerances
  • Body diameter: ±.0005"
  • Shank diameter: ±.0002"
  • Angle: ±15 minutes
  • Concentricity: .001" TIR
CNC Benefits
  • Consistent depth control
  • Repeatable results
  • Tool-to-tool consistency
  • Reduced setup time
CNC-K Precision Countersinks for CNC Machining
Available Configurations
  • Angles: 60°, 82°, 90°, 100°, 120°
  • Materials: HSS, Carbide
  • Sizes: 1/4" to 1" body
  • Flutes: 6-flute chatterless

CNC-K HSS Countersinks - 82° Included Angle

Premium M2 high-speed steel with precision tolerances for CNC applications.

Body Dia. Shank Dia. OAL Pilot Hole Tool Name HSS EDP
1/4" 1/4" 2" .096"-.136" CNC-K-250 02970
5/16" 5/16" 2-1/4" .120"-.170" CNC-K-312 02971
3/8" 3/8" 2-1/2" .144"-.203" CNC-K-375 02972
1/2" 1/2" 2-3/4" .192"-.272" CNC-K-500 02973
5/8" 1/2" 3" .240"-.339" CNC-K-625 02974
3/4" 1/2" 3-1/4" .288"-.407" CNC-K-750 02975
1" 1/2" 3-1/2" .384"-.543" CNC-K-1000 02976

CNC-K Carbide Countersinks - 82° Included Angle

Solid carbide for maximum tool life in high-volume production and abrasive materials.

Body Dia. Shank Dia. OAL Pilot Hole Tool Name Carbide EDP
1/4" 1/4" 2" .096"-.136" CNC-KC-250 03120
5/16" 5/16" 2-1/4" .120"-.170" CNC-KC-312 03121
3/8" 3/8" 2-1/2" .144"-.203" CNC-KC-375 03122
1/2" 1/2" 2-3/4" .192"-.272" CNC-KC-500 03123
5/8" 1/2" 3" .240"-.339" CNC-KC-625 03124
3/4" 1/2" 3-1/4" .288"-.407" CNC-KC-750 03125
1" 1/2" 3-1/2" .384"-.543" CNC-KC-1000 03126

CNC-K Countersinks - 90° Included Angle

90° angle for metric fastener applications and general chamfering.

Body Dia. Shank Dia. OAL Tool Name HSS EDP Carbide EDP
1/4" 1/4" 2" CNC-K-250-90 02980 03130
3/8" 3/8" 2-1/2" CNC-K-375-90 02981 03131
1/2" 1/2" 2-3/4" CNC-K-500-90 02982 03132
3/4" 1/2" 3-1/4" CNC-K-750-90 02983 03133
1" 1/2" 3-1/2" CNC-K-1000-90 02984 03134

Related Products

Chatterless Countersinks™

Standard 6-flute countersinks for all applications.

View Countersinks
3N1™ Countersinks

Combination drill-countersink-chamfer tools.

View 3N1
Regrind Service

Professional resharpening to restore CNC-K tolerances.

Learn More

Need Technical Support for Your CNC Application?

Our engineers can help optimize tool selection and cutting parameters for your specific machine and material.

Contact Engineering