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Cobalt Jobber-Length Drill Bits
Available274 products
Cobalt jobber-length drill bits tolerate higher drilling speeds and are harder and more wear-resistant than high-speed steel drill bits. They provide some shock absorption and can be used in handheld power tools. Jobber-length drill bits are the most commonly used drill-bit length. They provide a good balance of strength and accuracy when drilling into a variety of materials.
Primary Material Application
Straw/Bronze Finish Spiral-Flute Cobalt Jobber-Length Drill Bits
These drill bits have a straw/bronze finish that improves their wear resistance. They also have spiral flutes that evacuate chips as the bits drill into a workpiece.
Fractional Inch + 135 ° Drill Bit Point Angle + Split Point
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Fractional Inch + 143 ° Drill Bit Point Angle + Conventional Point
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Fractional Inch + 143 ° Drill Bit Point Angle + Split Point
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Letter + 135 ° Drill Bit Point Angle + Split Point
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Metric + 135 ° Drill Bit Point Angle + Split Point
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Decimal Inch + 135 ° Drill Bit Point Angle + Radial Point
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Wire + 135 ° Drill Bit Point Angle + Split Point
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Heavy-Duty Straw/Bronze Finish Spiral-Flute Cobalt Jobber-Length Drill Bits
These drill bits can drill into harder materials than would be possible with standard cobalt jobber-length drill bits with a straw/bronze finish. They are used for drilling tough, high-tensile, and work-hardened materials like titanium. The bits have a straw/bronze finish that improves their wear resistance, and they have spiral flutes that evacuate chips as the bits drill into a workpiece.
Fractional Inch + 135 ° Drill Bit Point Angle + Split Point
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Letter + 135 ° Drill Bit Point Angle + Split Point
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Metric + 135 ° Drill Bit Point Angle + Split Point
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Wire + 135 ° Drill Bit Point Angle + Split Point
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Black-Oxide Finish Spiral-Flute Cobalt Jobber-Length Drill Bits
These drill bits have a black-oxide finish that retains lubricants to improve the bits' wear resistance and chip flow. Black-oxide bits should only be used for drilling ferrous metals. Spiral-flute drill bits evacuate chips as the bits drill into a workpiece.
Fractional Inch + 135 ° Drill Bit Point Angle + Split Point
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Letter + 135 ° Drill Bit Point Angle + Split Point
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Wire + 135 ° Drill Bit Point Angle + Split Point
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TiAlN-Coated Parabolic-Flute Cobalt Jobber-Length Drill Bits
The TiAlN coating on these drill bits withstands high temperatures and protects the bits from wear during high-speed, dry machining applications with difficult-to-machine ferrous metals. Parabolic-flute drill bits have wide, deep flutes that improve chip flow and heat dissipation, which means feed rates do not need to be reduced as the drills move deeper into the workpiece.
Fractional Inch + 135 ° Drill Bit Point Angle + Split Point
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Metric + 135 ° Drill Bit Point Angle + Split Point
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Wire + 135 ° Drill Bit Point Angle + Split Point
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TiN-Coated Parabolic-Flute Cobalt Jobber-Length Drill Bits
The TiN coating on these drill bits protects them from wear and heat when drilling steel, stainless steel, and aluminum. Parabolic-flute drill bits have wide, deep flutes that improve chip flow and heat dissipation, which means feed rates do not need to be reduced as the drills move deeper into the workpiece.
Fractional Inch + 135 ° Drill Bit Point Angle + Split Point
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Metric + 135 ° Drill Bit Point Angle + Split Point
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Wire + 135 ° Drill Bit Point Angle + Split Point
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Left-Hand Bright Finish Spiral Flute Cobalt Jobber-Length Drill Bits
These bits have a left-hand drilling direction and can be used in reverse-drilling applications to remove broken screws from a hole. The bright finish is not affected when cutting edges are resharpened, and spiral flutes evacuate chips as the bit drills into a workpiece.
Fraction Inch + 135 ° Drill Bit Point Angle + Split Point
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