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Spotting Drills - Centering Drills

Spotting Drills / Centering Drills for Spot Drilling and Pre-Drilling Holes


Spotting Drills / Centering Drills

Standard & Metric Tool Sizes
For Spot Drilling, Centering, Chamfering, Pre-Drilling Holes and Deburring

Spott Drill for Pre Drilling Holes

  • These NC Spotting Drills have short flutes and no land or body relief to maintain maximum rigidity.
  • For use on Aluminum, Brass, Plastic, Wood as well as more difficult materials such as Steel, Stainless steel, Composites, Inconel, and Titanium.
  • When tight tolerance hole locations are required spot drilling is required to prevent the drill from walking. Spotting drills improve the accuracy of the secondary drilled hole
  • Each size may be used on a wide range of hole diameters.  The typical diameter of a spot drilled hole is 50-75% of the secondary final drill diameter.
  • For softer materials 90° points are typically used to start drills up to 120°.
  • 120° points are used to start drills above 120° (typically 135° drills). This allows the outer cutting edge of the secondary drill to start cutting before the point touches.
  • For tougher and harder materials and for high performance secondary drills the 145° point is recommended. This allows the point of the secondary drill to touch before the outer cutting edge. This helps to reduce chatter and prevent chipping of the secondary drill’s cutting edges.
  • This tool may also be used for chamfering or deburring.
  • Produced from a Premium, Ultra-Fine, Nano Grade Solid Carbide for maximum tool strength and durability.
  • Designed and manufactured in house with many tool sizes in stock.

Select a Tool Diameter Below to Order, or for More Information.

Spotting Drills
Standard Tool Sizes
Tool Diameter Included Angles Get More Info
 1/8" (.125") 90°, 120°, 145° More Info
 11/64" (.1719") 90°, 120°, 145° More Info
 3/16" (.1875") 90°, 120°, 145° More Info
 1/4" (.250") 90°, 120°, 145° More Info
 3/8" (.375") 90°, 120°, 145° More Info
 1/2" (.500") 90°, 120°, 145° More Info
 9/16" (.5625") 90°, 120°, 145° More Info
 3/4" (.750") 90°, 120°, 145° More Info
 4 mm (.157") 90°, 120°, 145° More Info
 6 mm (.236") 90°, 120°, 145° More Info

If you do not see see the size you are looking for:
Contact us or submit a custom tool drawing (download pdf).
-  Our custom tools have a quick turn-around.

See all Countersink Tools, Chamfering Tools, Spotting Drills, and Broken Tap Tools

 

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