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Silver HSS drill bit with reduced shank, 51/64 inch, overall length 6 inches

Drill America

Drill America 51/64in HSS 1/2in Reduced Shank Silver and Deming Drill Bit pneumatic accessory

SKU CH-NA0R-HG8XR

A 51/64 inch high-speed steel Silver and Deming drill bit with a reduced 1/2 inch shank for use in larger drill chucks

  • Product typeDrill Accessories
  • 51/64 inch HSS drill bit for large-hole drilling
  • Reduced 1/2 inch shank fits standard chucks
  • Surface-treated flutes improve chip evacuation
  • Silver and Deming design handles heavy-duty applications

Drill America 51/64in HSS Reduced Shank Bit

The Drill America 51/64in HSS drill bit features a 1/2in reduced shank designed for Silver and Deming applications. Its high-speed steel construction includes surface-treated flutes to resist wear during heavy-duty drilling tasks. This new accessory targets machinists and maintenance crews who need a single large-diameter hole in metal stock. The 3in flute length and 6in overall length suit standard drill presses and heavy handheld units.

Practical limits of the reduced shank interface

The 1/2in reduced shank fits common 1/2in capacity chucks but cannot be secured in smaller three-jaw chucks. Maximum cutting depth is restricted by the 3in flute length, so deeper holes require a different tool. High-speed steel performs well in mild steel and cast iron yet loses hardness quickly in stainless or hardened alloys without coolant. Buyers needing larger diameters or extended reach should select alternative tooling.

How it compares

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

Price $17.99
Cheaper than about 68% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

Should I choose the 51/64 inch size for a 0.7969 decimal equivalent hole?

Yes, this bit is exactly 51/64 inch, which equals 0.7969 decimal, matching that target hole size.

How does the 1/2 inch reduced shank perform in a standard drill chuck?

The 1/2 inch reduced shank fits any 1/2 inch or larger chuck, letting you drill 51/64 inch holes without needing a larger-capacity drill.

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