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  • Precision Twist R58 High Speed Steel Reduced Shank Drill Bit, Uncoated (Bright) and Black Oxide Finish, 3/4" Reduced Shank, 118 Degree Conventional Point, 1 3/4"
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Precision Twist R58 High Speed Steel Reduced Shank Drill Bit, Uncoated (Bright) and Black Oxide Finish, 3/4" Reduced Shank, 118 Degree Conventional Point, 1 3/4"

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List Price: $397.00
Price: $177.25 & FREE Shipping. Details
You Save: $219.75 (55%)
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Product Specifications
Mfr Part # 91304
Pkg Qty 1
UPC 086071913043
Cutting Diameter 1-3/4  inches
Cutting Length 3  inches
EAN 0086071913043
Flute Length 3  inches
Item Weight 2 pounds
Mfg Series # R58
Outside Diameter 1.7500  inches
Overall Length 6  inches
Shank Diameter 3/4  inches
Size 1-3/4"
Style Name Reduced-Shank
System of Measurement Inch
Specification for this product family (See all  products)
Brand Name Precision Twist
Material Type High-Speed Steel
Finish Types Uncoated (Bright)
Cutting Angle 118  Degrees
Cutting Direction Right-Hand
Drill Point Conventional
Flute Type Spiral
Shank Type Round
UNSPSC Code 20121600


Product Features

  • Three-quarter-inch round shank allows larger sized drills to fit into small size chucks
  • Combination black oxide and bright finish, improves lubricity, resists corrosion, and will not chip or flake off
  • 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
  • High-speed steel (HSS), for use on a wide variety of materials

Product Details


Product Description

The Precision Twist R58 Jobber-length, uncoated, general-purpose, round shank drill bit drills holes into a wide variety of metals and synthetic materials with best performance with steel, stainless steel, cast iron, titanium, and nickel. It can drill to a depth up to one and a half times the diameter of the drill size. Flute length is three inches, overall length is six inches, with a half-inch, reduced shank.

Combination steam tempered (sometimes called black oxide) and uncoated finish improves lubricity, resists corrosion, and will not chip or flake off. Black oxide also helps to prevent buildup and welding of material on the cutting edge when working with iron and steel.

Reduced shanks are smaller than the drill diameter, so they can drill holes larger than the typical chuck capacity. These are sometimes called Silver & Deming drills as they were made by Silver & Deming in the late 1800s. Now, this refers to any reduced shank twist drill bit.

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) standards, which help 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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