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Cobalt Extended-Length Drill Bits
Cobalt extended-length drill bits tolerate higher drilling speeds and are harder and more wear-resistant than high-speed steel extended-length drill bits. They provide some shock absorption and can be used in handheld power tools. These extended-length drill bits have longer flutes and more overall length than standard jobber-length drill bits of the same size, and they have longer shanks than taper-length drill bits. Their extra length allows them to create deep holes or drill into hard-to-reach workpieces.
This number nine, cobalt steel, aircraft extension drill bit has a flute length of 2 7/16 inches, an overall length of six inches, and a diameter of 0.196 inches.
This number nine, cobalt steel, aircraft extension drill bit has a flute length of 2 7/16 inches, an overall length of six inches, and a diameter of 0.196 inches.
This number 47, cobalt steel, aircraft extension drill bit has a flute length of one inch, an overall length of six inches, and a diameter of 0.0785 inches.
This number 47, cobalt steel, aircraft extension drill bit has a flute length of one inch, an overall length of six inches, and a diameter of 0.0785 inches.
This number 39, cobalt steel, aircraft extension drill bit has a flute length of 1 3/8 inches, an overall length of six inches, and a diameter of 0.0995 inches.
This number 39, cobalt steel, aircraft extension drill bit has a flute length of 1 3/8 inches, an overall length of six inches, and a diameter of 0.0995 inches.
This number 11, cobalt steel, aircraft extension drill bit has a flute length of 2 5/16 inches, an overall length of six inches, and a diameter of 0.191 inches.
This number 11, cobalt steel, aircraft extension drill bit has a flute length of 2 5/16 inches, an overall length of six inches, and a diameter of 0.191 inches.
This number 21, cobalt steel, aircraft extension drill bit has a flute length of 2 1/8 inches, an overall length of six inches, and a diameter of 0.159 inches.
This number 21, cobalt steel, aircraft extension drill bit has a flute length of 2 1/8 inches, an overall length of six inches, and a diameter of 0.159 inches.
This number 40, cobalt steel, aircraft extension drill bit has a flute length of 1 3/8 inches, an overall length of six inches, and a diameter of 0.098 inches.
This number 40, cobalt steel, aircraft extension drill bit has a flute length of 1 3/8 inches, an overall length of six inches, and a diameter of 0.098 inches.
This number 56 aircraft extension drill bit has a flute length of 3/4 inches and an overall length of six inches. It is made of cobalt steel and has a diameter of 0.0465 inches.
This number 56 aircraft extension drill bit has a flute length of 3/4 inches and an overall length of six inches. It is made of cobalt steel and has a diameter of 0.0465 inches.
This number 42, cobalt steel, aircraft extension drill bit has a flute length of 1 1/4 inches, an overall length of six inches, and a diameter of 0.0935 inches.
This number 42, cobalt steel, aircraft extension drill bit has a flute length of 1 1/4 inches, an overall length of six inches, and a diameter of 0.0935 inches.
This number 33, cobalt steel, aircraft extension drill bit has a flute length of 1 1/2 inches, an overall length of six inches, and a diameter of 0.113 inches.
This number 33, cobalt steel, aircraft extension drill bit has a flute length of 1 1/2 inches, an overall length of six inches, and a diameter of 0.113 inches.
This number 32, cobalt steel, aircraft extension drill bit has a flute length of 1 5/8 inches, an overall length of six inches, and a diameter of 0.116 inches.
This number 32, cobalt steel, aircraft extension drill bit has a flute length of 1 5/8 inches, an overall length of six inches, and a diameter of 0.116 inches.
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