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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 17, cobalt steel, aircraft extension drill bit has a flute length of 2 3/16 inches, an overall length of six inches, and a diameter of 0.173 inches.
This number 17, cobalt steel, aircraft extension drill bit has a flute length of 2 3/16 inches, an overall length of six inches, and a diameter of 0.173 inches.
This number 31, 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 0.12 inches.
This number 31, 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 0.12 inches.
This number 35, 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 0.111 inches.
This number 35, 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 0.111 inches.
This number 54 aircraft extension drill bit has a flute length of 7/8 inches and an overall length of six inches. It is made of cobalt steel and has a diameter of 0.055 inches.
This number 54 aircraft extension drill bit has a flute length of 7/8 inches and an overall length of six inches. It is made of cobalt steel and has a diameter of 0.055 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 18, 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 0.1695 inches.
This number 18, 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 0.1695 inches.
This number five, cobalt steel, aircraft extension drill bit has a flute length of 2 1/2 inches, an overall length of six inches, and a diameter of 0.2055 inches.
This number five, cobalt steel, aircraft extension drill bit has a flute length of 2 1/2 inches, an overall length of six inches, and a diameter of 0.2055 inches.
This number 38, cobalt steel, aircraft extension drill bit has a flute length of 1 7/16 inches, an overall length of six inches, and a diameter of 0.1015 inches.
This number 38, cobalt steel, aircraft extension drill bit has a flute length of 1 7/16 inches, an overall length of six inches, and a diameter of 0.1015 inches.
This number three, cobalt steel, aircraft extension drill bit has a flute length of 2 1/2 inches, an overall length of six inches, and a diameter of 0.213 inches.
This number three, cobalt steel, aircraft extension drill bit has a flute length of 2 1/2 inches, an overall length of six inches, and a diameter of 0.213 inches.
This number six, cobalt steel, aircraft extension drill bit has a flute length of 2 1/2 inches, an overall length of six inches, and a diameter of 0.204 inches.
This number six, cobalt steel, aircraft extension drill bit has a flute length of 2 1/2 inches, an overall length of six inches, and a diameter of 0.204 inches.
This number 16, cobalt steel, aircraft extension drill bit has a flute length of 2 3/16 inches, an overall length of six inches, and a diameter of 0.177 inches.
This number 16, cobalt steel, aircraft extension drill bit has a flute length of 2 3/16 inches, an overall length of six inches, and a diameter of 0.177 inches.
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