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Alvord Polk 127-2 High-Speed Steel Chucking Reamer, Left Hand Spiral Flute, Round Shank, Uncoated (Bright)

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Product Specifications
Cutting Direction
Right Hand
Finish Types
Uncoated (Bright)
Shank Type
Material Type
High Speed Steel
Brand Name
Alvord Polk
Flute Type
Left Hand Spiral

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Key Features

  • Left-hand spiral reamers are good for use in through holes (holes that extend all the way through a workpiece), as they push chips ahead of the tool and into the hole
  • Spiral reamers are recommended for reaming holes with interruptions, as they prevent damage to the workpiece edge and tool
  • Round shank tools are cylindrical and should be held in a good-quality toolholder in order to prevent the reamer from slipping in high torque applications, which can cause tool freeze, loss of accuracy, and tool damage
  • Uncoated (bright) tools have no finish or coating. They are a good choice for general purpose applications
  • High-speed steel is a common general purpose steel for cutting tools, is compatible with a variety of materials, and tends to be lower in price than cobalt steel or carbide

Product Description

The Alvord Polk 127-2 left-hand spiral chucking reamer (also called a machine reamer) is a general purpose round shank tool made of high-speed steel with no finish or coating, and is most commonly chosen for reaming interrupted cuts. This tool can be used in a drill press, screw machine, lathe, or other good-quality toolholder.

Left-hand spiral reamers are useful for interrupted cuts and in through holes. Spiral reamers prevent whole flute contact with the leading edge in an interrupted cut, as in a keyway. This prevents damage to the interruption and reamer flute. Left-hand spiral style tools also push chips ahead of the tip of the tool, instead of pulling chips out of a hole. Left-hand spiral reamers are commonly also useful when reaming through holes, since pushing chips into the hole can cause clogging, which may damage the tool.

For reamers in the 127-2 series with 0.0280 – 0.1561 inches diameter there are four flutes, for 0.1562 – 0.5220 inches diameter there are six flutes, for 0.5221 – 0.8820 inches diameter there are eight flutes, for 0.8821 – 1.1950 inches diameter there are 10 flutes, and for 1.1951 – 1.5000 inches diameter, there are 12 flutes. Tolerances are +0.0002 -0.0000 inches for all reamers in the 127-2 series except for those that are dowel-pin sized, in which case tolerances are +0.0000 -0.0002 inches.

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

Alvord Polk manufactures a broad family of cutting tools, brushes, and tooling components, following ISO 9001 standards for quality and environmental impact of their products. Their offices and manufacturing facilities have been located in the United States since 1881.

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