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  • Precision Twist 76HA High Speed Steel Center Drill Bit, Uncoated (Bright) Finish, Round Shank, Spiral Flute, 60 Degree Point Angle
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Precision Twist 76HA High Speed Steel Center Drill Bit, Uncoated (Bright) Finish, Round Shank, Spiral Flute, 60 Degree Point Angle

Available in multiple versions


Price: $43.19 - $215.11
Product Specifications
Brand Name Precision Twist
Material Type High-Speed Steel
Finish Types Uncoated (Bright)
Cutting Direction Right-Hand
Flute Type Spiral
Shank Type Round
UNSPSC Code 20121600

The Precision Twist 76HA regular-length bit is a round shank, center drill bit made of HSS wit... Read full product description



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#00 B002092250
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#000 B00271FP50
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$215.11
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$51.88
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$43.19
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#6 B001VXY812
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#7 B00209666G
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Product Features

  • Regular-length center drill bits, for drilling pilot holes to increase hole accuracy to increase hole accuracy
  • 60-degree conventional point angles, to help reduce stress on drill's corners
  • Round shanks, for use on a variety of tool-holding systems
  • Uncoated (bright), for use with a wide range of drilling materials
  • High-speed steel (HSS), for use on a wide variety of materials

Product Details


Product Description

The Precision Twist 76HA regular-length bit is a round shank, center drill bit made of HSS with an uncoated finish and is used for starting a hole. It is designed for drilling to a depth up to one times the diameter of the drill. It is suitable for drilling into a wide variety of metals and synthetic materials, performing best with steel and cast iron. It is double ended with the same type of cutting edges on both ends.

The 76HA series with a 60-degree conventional point geometry should only be used to start holes; do not go deeper than the diameter of the drill bit. Recommended for use in lathes, this design creates a small starter hole, which guides the follow-up drill and prevents walking. They also create a countersink of 60 degrees. The regular length is the most common and offers a good compromise between reach and rigidity for hole-starting. The uncoated finish helps increase chip flow in soft materials. Spiral flutes with a right-hand twist act as a passageway for chip extraction from the hole and for coolant to enter the hole. The right-hand twist brings chips up and away from the cutting edge.

Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are the most common type of drill bit used. Twist drill bits can be used in hand-operated drills, standalone drill presses, or a lathe. They are made to ANSI industry standards, which ensure that drill bits around the world confirm to the same specifications.

Precision manufactures machine tools under the following brands: Precision Twist, Precision Dormer, and Union Butterfield. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.


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