We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver cobalt drill bit with reduced shank, 59/64 inch size

Drill America

Drill America DWDCO59-64 59/64" Reduced Shank Cobalt Drill Bit

SKU CH-7QE6-NDCDN

A 59/64" cobalt steel drill bit with a reduced 1/2" shank, HD notched point, 3" flute length and 6" overall length

  • Product typeDrill Bits
  • Cobalt steel resists heat and wear
  • Reduced 1/2" shank fits standard chucks
  • HD notched point starts holes cleanly
  • 3" flute clears chips in deep cuts

59/64" Cobalt Drill Bit for Heavy-Duty Drilling

This reduced-shank cobalt drill bit is built for drilling large-diameter holes in tough metals such as stainless steel and high-tensile alloys. The 59/64-inch size suits maintenance, fabrication and automotive shops that need a single bit for repetitive production work. Its 3-inch flute length and 6-inch overall length provide deep-hole reach without requiring an extended holder. The silver-and-deming shank fits standard 1/2-inch chucks on bench or handheld drills.

Cobalt Steel and Notched Point Extend Bit Life

The cobalt steel construction resists heat buildup during prolonged cuts, reducing edge wear compared with standard high-speed steel. An HD notched point centres the bit quickly and lowers thrust force, so the operator can maintain feed pressure without walking or chatter. These features combine to deliver longer service intervals and fewer bit changes on demanding jobs. The bit is sold individually, ready for immediate use.

How it compares

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

Price $30.99
Typical for this category: the median of 5,493 items is $27.99.

Specifications

Product
Product typeDrill Bits

Questions about this item

When will the 59/64" cobalt bit need resharpening or replacement?

Resharpen when the HD notched point no longer self-centres or when chips turn blue from excess heat; cobalt steel holds an edge longer than high-speed steel, so intervals are extended in tough alloys.

What limit appears first during a long run in stainless steel with the .9219" bit?

Heat buildup at the reduced shank junction typically limits continuous drilling before the cobalt flutes lose hardness, so use cutting fluid and peck cycles to manage temperature.

More in Bits, Hole Saws & Accessory Kits

Similar items