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Silver twist drill bit 1-7/16 inch diameter 1/2 inch shank three flat sides

Drill America

Drill America 1-7/16in HSS 1/2in Shank KFD Drill Bit with 3-Flat pneumatic accessory

SKU CH-B3AP-XP4T5

1-7/16 inch HSS drill bit with 1/2 inch reduced shank and three-flat grip for heavy-duty drilling

  • Product typeDrill Accessories
  • 1-7/16in drilling capacity with HSS construction
  • 1/2in reduced shank fits standard chucks
  • 3-flat shank prevents slippage under load
  • Split-point tip starts holes without walking

Drill America 1-7/16in KFD Drill Bit

This high-speed steel drill bit features a 1/2in reduced shank with three flats for secure chuck grip. The Killer Force design includes a heavy-duty split point that starts on contact and reduces walking. It suits professionals needing a large-diameter bit for stationary drilling in metal.

Sustained drilling with reduced-shank HSS

The 3-flat shank prevents spin-out when torque builds during deep cuts. High-speed steel construction resists heat buildup better than carbon steel, maintaining edge life through repeated holes. The split-point geometry keeps the bit centred without a centre punch, reducing lateral force on the drill motor. Builders who need a bit longer than 6in overall or a shank larger than 1/2in should select a different tool.

How it compares

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

Price $34.99
Pricier than about 57% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

How much heat builds up in the 1-7/16" HSS drill bit with 3-flat shank during extended heavy-duty drilling?

The high-speed steel construction and heavy-duty split point are designed to dissipate heat efficiently during prolonged use, while the reduced shank helps maintain stability under load.

What chuck size is required to hold the 1/2" shank with three flats on this Killer Force drill bit?

A 1/2" capacity drill chuck is needed to secure the three-flat shank, which prevents slipping when drilling at the 1.4375" decimal equivalent size.

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