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Silver high-speed steel drill bit 12 inches long with 1/2 inch round shank

Drill America

Drill America DWDDL12X41/64X1/2 41/64" x 12" HSS Extra Long Drill Bit 1/2" Shank

SKU CH-W726-P4EDY

A 12-inch high-speed steel drill bit with a 41/64-inch diameter and 1/2-inch shank for deep-reach drilling in metal, wood and plastic

  • Extra reach for deep holes with 12 inch overall length
  • 41/64 inch diameter suits large fastener clearance holes
  • High-speed steel construction handles steel, iron, aluminium and wood
  • 118 degree conventional point starts accurately without centre punch
  • 1/2 inch round shank fits standard drill chucks and holders

Drill America 41/64" Extra Long HSS Bit

The Drill America DWDDL12X41/64X1/2 is a high speed steel drill bit measuring 41/64" in diameter and 12" in overall length. It features a 1/2" round shank compatible with a wide range of toolholding systems. The 118° conventional point is designed for general purpose drilling across a broad range of materials including iron, steel, aluminum, brass, copper, plastic and wood.

Replacing shorter bits for deep reach

This extra length drill replaces standard jobber bits when the application requires extended reach through thick workpieces or difficult access points. The jump is worth it when a shorter bit cannot physically reach the drilling location or when drilling deep holes in production, maintenance or portable drilling jobs where the extra flute length clears chips more effectively over distance.

Check shank capacity and workpiece material

Before ordering, verify that your drill chuck or toolholder accepts a 1/2" round shank, as smaller chucks will not secure this bit. Confirm the material you are drilling falls within the recommended iron, steel, non-ferrous metal, plastic or wood families. Be aware that this product carries a California Proposition 65 warning regarding chemicals known to cause cancer and reproductive harm.

How it compares

Measured against everything we stock in Power Drills, Drivers & Cutting Bits, at today’s prices. Recalculated every night.

Price $39.99
Cheaper than about 67% of the 2,412 comparable items (median $81.99).

Specifications

Product
Brand nameDRILL AMERICA

Questions about this item

What shank diameter does the 12" drill bit need for a secure fit?

The 12" drill bit has a 1/2" round shank that fits standard three-jaw chucks and collet systems.

How do I install the 41/64" bit without damaging the 118° point?

Open the chuck fully, insert the round shank until it seats, then tighten evenly; the step often missed is centring the shank before final tightening to prevent run-out.

When should I replace the HSS extra-long drill bit?

Replace the bit when the 118° conventional point dulls, chips form on the cutting lips, or the flute clogs repeatedly during drilling in steel, aluminium or wood.

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