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Union Butterfield 4587 High-Speed Steel Taper Pin Reamer, Straight Flute, Round With Square End Shank, Uncoated (Bright) Finish

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Product Specifications
Cutting Direction
Cutting Length
1.11/16  inches
Finish Types
Uncoated (Bright)
Shank Type
Round With Square End
Material Type
High Speed Steel
Brand Name
Precision Twist
Flute Type

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Taper Pin 0 B003JY6V5C yes $25.66 Buy Options
Taper Pin 1 B003JY6V5M yes $24.56 Buy Options
Taper Pin 10 B003JY6V5W yes $72.86 Buy Options
Taper Pin 2 B003JY6V6Q yes $25.73 Buy Options
Taper Pin 3 B003JY6V7A yes $25.97 Buy Options
Taper Pin 4 B003JY6V84 Usually ships in 1 to 4 weeks $32.17 Buy Options
Taper Pin 5 B003JY6V8O yes $33.24 Buy Options
Taper Pin 6 B003JY6V98 yes $33.48 Buy Options
Taper Pin 7 B003JY6VA2 yes $43.26 Buy Options
Taper Pin 8 B003JY6VAM yes $52.10 Buy Options
Taper Pin 9 B003JY6VBG yes $64.85 Buy Options

Key Features

  • Taper pin reamer reams holes to receive standard taper pins
  • Straight flute construction for reaming uninterrupted cuts in through holes and blind holes
  • Round shank with square end helps to minimize rotation in the tool holder
  • High-speed steel is compatible with a variety of materials
  • Uncoated (bright) tools have no additional surface treatment or coating, suitable for general-purpose applications

Product Description

The Union Butterfield 4587 uncoated, high-speed steel taper pin reamer has straight flutes and a round shank with a square end, and is used for reaming holes intended to receive taper pins. The straight flutes make small, circular, and precise enlargements to through holes (extending through the workpiece) and blind holes (with only one opening). This reamer is useful for uninterrupted cuts in general-purpose applications.

High-speed steel (HSS) is a common, general-purpose steel for cutting tools and is compatible with a variety of materials. With no coating or surface treatment, this uncoated tool can be used on a broad range of materials, and provides an economical alternative to coated tools. The square end shank helps to minimize rotation in the tool holder. This tool can be used in drill presses, screw machines, or lathes.

The number of flutes on a reamer depends on the cutting diameter of the tool. Reamers in this series with taper pin sizes 0 to 8 have six flutes and those with taper pin sizes 9 and 10 have eight flutes.

Reamers are used to finish existing holes. When holes are created using common applications such as drilling or punching, they often have minute imperfections. Their roundness may be flawed, or their diameters may be slightly smaller than required. Reamers are made to exacting tolerances, so they can correct such errors and create precisely round holes with exact dimensions. Reaming is often used before tapping screw threads.

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

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