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

Drill America

Drill America 7/8in HSS 1/2in Shank KFD Drill Bit 3-Flat Shank pneumatic accessory

SKU CH-5ZF8-5KKNT

A 7/8-inch high-speed steel drill bit with a 1/2-inch three-flat shank, heavy-duty split point, and reduced shank design for secure pneumatic drilling

  • Product typeDrill Accessories
  • 7/8 inch drilling capacity handled by high-speed steel construction
  • Heavy-duty split point starts holes accurately without wandering
  • 3-flat shank design prevents slippage in 1/2 inch chucks
  • Reduced shank allows use with standard 1/2 inch drill chucks

7/8in HSS KFD Drill Bit with 3-Flat Shank

This high-speed steel drill bit features a 7/8 inch diameter and a 1/2 inch reduced shank with three flats for secure chuck grip. The Killer Force design incorporates a heavy-duty split point that reduces walking and improves penetration in tough materials. It suits professional mechanics and fabricators who need reliable hole-making in metal. The overall length is 6 inches with a 3 inch flute length for deep drilling capacity.

Reduced-shank design fits standard 1/2in chucks

The 1/2 inch shank allows this large-diameter bit to be used in common drill presses and heavy-duty handheld drills without requiring a specialised large-capacity chuck. Three flat surfaces on the shank prevent slippage under high torque loads. The split-point geometry centres the cut immediately, freeing the operator from using a centre punch on many materials. It does not suit machines limited to smaller shank diameters or applications requiring coolant-through tooling.

How it compares

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

Price $14.99
Cheaper than about 77% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

How long does the 3-flat shank stay secure before slipping under heavy torque?

The 3-flat shank design grips the chuck tightly to resist rotation during high-load drilling.

Does the high-speed steel overheat quickly during all-day use?

HSS construction handles continuous cutting heat better than carbon steel in sustained operations.

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