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Silver twist drill bit with three flat shank sections and reduced shank diameter

Drill America

Drill America 47/64in HSS 1/2in Shank KFD Drill Bit with 3-Flat Shank

SKU CH-ASB7-T29JY

A 47/64 inch high-speed steel drill bit with a 1/2 inch reduced shank and three flats for secure chuck grip

  • Product typeDrill Accessories
  • 47/64 inch diameter drills large holes efficiently
  • High-speed steel construction resists heat and wear
  • 1/2 inch reduced shank fits standard chucks
  • Three-flat shank prevents slipping under heavy load

Drill America 47/64" HSS KFD Drill Bit

This 47/64 inch high-speed steel drill bit features a 1/2 inch shank with three flats for secure chuck grip. The Killer Force design includes a heavy-duty split point that reduces walking and improves penetration in tough materials. Flute length is three inches and overall length is six inches for deep-hole work. Decimal equivalent is .7344 for precise sizing.

Suits metalworkers needing large reduced-shank bits

Machinists and fabricators drilling 47/64 inch holes in steel or cast iron will appreciate the split-point start and rigid shank. Users requiring smaller diameters, metric sizes, or carbide-tipped cutting edges should select a different bit. Those without a 1/2 inch capacity chuck cannot use this shank.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 80% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

How do I install the 47/64in HSS drill bit with its 1/2in 3-flat shank, and what step is often missed?

Insert the 3-flat shank fully into the chuck and tighten each flat against a jaw so the bit cannot spin; the step many miss is checking that all three flats seat evenly before drilling.

What maintenance or replacement will the 47/64in KFD drill bit need later?

Resharpen the heavy-duty split point when cutting slows, and replace the bit once the 3in flute length wears down or the 1/2in reduced shank shows damage.

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