• 966
  • Straight flute for general-purpose reaming of uninterrupted cuts in through holes and blind holes
  • 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
  • 45-degree bevel at the cutting tip facilitates entry to a pre-drilled hole
  • Round shank aids accurate centering; designed to be held in a chuck or collet for high-torque applications
The Union Butterfield 4533 high-speed steel straight flute chucking reamer (also called a machine reamer) is an uncoated (bright) round shank tool with a 45-degree bevel lead, commonly used for general-purpose reaming of uninterrupted cuts. This tool is often used in a drill press, screw machine or lathe. Straight flute reamers are useful for uninterrupted cuts in general-purpose applications. They make small, circular, and precise enlargements to through holes (extending through the workpiece) and blind holes (with only one opening). They can be used on a wide variety of materials including cast iron, aluminum, and tool steel. High-speed steel is a general-purpose steel for cutting tools and is compatible with many metalworking materials. It is often lower in price than other cutting tool substrates. Like most non-tapered chucking reamers, the Union Butterfield 4533 has a 45-degree bevel at the cutting tip that facilitates entry to a pre-drilled hole.
Union Butterfield
Chucking Reamer

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