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Drill America 1/2 inch cobalt drill bit with reduced 3/8 inch shank bronze oxide finish

Drill America

Drill America 1/2in Cobalt Reduced Shank Drill Bit x 3/8 Shank pneumatic accessory

SKU CH-6GDN-8JRET

A 1/2-inch cobalt drill bit with a reduced 3/8-inch shank and bronze oxide finish for heavy-duty drilling

  • Product typeDrill Accessories
  • Cobalt steel resists heat during heavy drilling
  • Reduced 3/8 shank fits smaller chucks securely
  • Bronze oxide coating lowers friction and wear
  • Surface-treated flutes clear chips for smoother cuts

1/2 inch cobalt reduced-shank drill bit

This Drill America accessory fits pneumatic and power tools that accept a 3/8 inch shank. The cobalt steel construction resists heat during metal drilling. A bronze oxide coating reduces friction and protects the cutting edges. The reduced shank allows the 1/2 inch bit to be used in smaller chucks.

Sustained-load behaviour

Surface-treated flutes clear chips efficiently so the bit runs cooler during extended drilling sessions. Cobalt steel maintains hardness at elevated temperatures, reducing the risk of edge softening under continuous load. The 5000 decimal equivalent ensures precise hole sizing throughout long production runs. Flute length of 4-1/2 inches supports deep-hole work without frequent withdrawal.

How it compares

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

Price $12.99
Cheaper than about 82% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

Does the cobalt steel and oxide coating keep the bit cool during all-day drilling?

The cobalt steel construction and bronze oxide surface treatment help dissipate heat and reduce friction, keeping the bit cooler during extended use compared to standard high-speed steel.

What chuck size is required to hold the 3/8" reduced shank on this 1/2" bit?

The reduced 3/8" shank fits any standard drill chuck that accepts 3/8" or larger, so a common 3/8" or 1/2" keyed or keyless chuck will hold it securely.

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