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  • Precision Twist R18 High Speed Steel Jobber Drill Bit, Black Oxide Finish, Round Shank, Spiral Flute, 118 Degree Point Angle
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Precision Twist R18 High Speed Steel Jobber Drill Bit, Black Oxide Finish, Round Shank, Spiral Flute, 118 Degree Point Angle

Available in multiple versions


Price: $16.34 - $40.20
Product Specifications
Brand Name Precision Twist
Material Type High-Speed Steel
Finish Types Black Oxide
Cutting Angle 118  Degrees
Cutting Direction Right-Hand
Drill Point Conventional
Flute Type Spiral
Shank Type Round
UNSPSC Code 20121600

The Precision Twist R18 jobber drill bit is a conventional point, general-purpose, round shank... Read full product description



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Product Features

  • Jobber-length drill bits, most common length drill bit, suitable for a wide range of applications
  • 118-degree conventional point angles, for general drilling applications
  • Round shanks, for use on a variety of tool-holding systems
  • Steam tempering (black oxide) finish, retains cutting fluid and prevents chip to tool welding
  • High-speed steel (HSS), for use on a wide variety of materials

Product Details


Product Description

The Precision Twist R18 jobber drill bit is a conventional point, general-purpose, round shank drill bit made of HSS with a steam tempering (also called black oxide) finish. It is suitable for drilling to a depth up to four times the diameter of the drill. Good for portable or machine drilling. The shank diameter is the same as the drill size. It was designed for drilling holes into a wide variety of metals and synthetic materials.

The R18 series has a type N flute form, with a regular helix (21- to 34-degree) angle have best performance drilling into steel or cast iron. The finish retains lubricants to aid in wear resistance and chip flow. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. 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 are commonly used to drill holes with hand-operated drills, standalone drill presses, or lathes. The flutes of the drill bit act a passageway for chip extraction from the hole and for coolant to enter the hole. These drill bits have a right-hand twist that brings chips up and away from the cutting edge. They are made to ANSI (fractional sizing) industry standards, which ensure that drill bits around the world conform to the same specifications.

Precision manufactures machine tools under the following brands: Precision Twist, Precision Dormer, and Union Butterfield. They have locations around the world, and provide tools adhering to ANSI, NAS, and DIN standards.


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