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Silver twist drill bit with three flat shank faces and split point tip

Drill America

Drill America 39/64in HSS 1/2in Shank KFD Drill Bit with 3-Flat Shank

SKU CH-BCYX-GMDXF

HSS drill bit with 39/64 inch diameter, 1/2 inch reduced shank, three-flat grip and heavy-duty split point for secure drilling

  • TypeDrill Accessories
  • 39/64 inch diameter for precise large holes
  • HSS construction resists heat during heavy drilling
  • 1/2 inch reduced shank fits standard chucks
  • 3-flat shank prevents slipping under high torque

39/64in HSS Drill Bit with 3-Flat Shank

This Drill America KFD drill bit is built for heavy-duty drilling in metal and other tough materials. The 1/2in reduced shank with three flats locks securely in a standard drill chuck, preventing spin-out under high torque. The split-point tip is designed to start on contact and reduce walking, making it suitable for professional maintenance and fabrication work.

Upgrading from standard twist bits

A standard twist bit with a round shank can slip in a chuck when drilling large diameters, especially in hard steel or cast iron. The 3-flat shank on this bit eliminates that slippage, so the upgrade is worth it whenever the workpiece material or hole size demands maximum torque transfer. Buyers who need a bit for light-duty wood or plastic drilling will not benefit from the heavy-duty split-point geometry.

Highlights

  • 39/64 inch diameter for precise large holes
  • HSS construction resists heat during heavy drilling
  • 1/2 inch reduced shank fits standard chucks
  • 3-flat shank prevents slipping under high torque

Specifications

BrandDrill America
TypeDrill Accessories

Questions about this item

What chuck size fits the 1/2in shank on this drill bit?

A 1/2in or larger chuck accepts the reduced shank; the three flats prevent slipping when the chuck is tightened properly.

How should the three-flat shank be aligned during installation?

Seat the flats against the chuck jaws before tightening; the split point centres the bit so it starts on contact without wandering.

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