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Alvord Polk 155-H High-Speed Steel Taper Pin Reamer, Left Hand Helical Flute, Round Shank, Uncoated (Bright)

Available in multiple versions

Price: $24.01 - $81.44
Product Specifications
Brand Name Alvord Polk
Material Type High Speed Steel
Finish Types Uncoated (Bright)
Cutting Direction Right Hand
Flute Type Left Hand Fast Helix
Shank Type Round
UNSPSC Code 23241617

The Alvord Polk 155-H left-hand helical flute taper pin reamer is a round shank tool made of h... See more product details

Currently showing 1-16 of 16
System of Measurement Size Part Number
The Amazon Standard Item Number (ASIN) uniquely identifies the item in the Amazon catalog.
Price Quantity
Taper Pin 6/0 B002PHNG48
Taper Pin 5/0 B002PHNG4S
Taper Pin 4/0 B002PHNG52
Taper Pin 3/0 B002PHNG5C
Taper Pin 2/0 B002PHNG5M
Taper Pin 0 B002PHNG66
Taper Pin 1 B002PHNG6G
Taper Pin 2 B002PHNG6Q
Taper Pin 3 B002PHNG7A
Taper Pin 4 B002PHNG7K
Taper Pin 5 B002PHNG7U
Taper Pin 6 B002PHNG84
Taper Pin 7 B002PHNG8E
Taper Pin 8 B002PHNG8O
Taper Pin 9 B002PHNG98
Taper Pin 10 B002PHNG9I
Currently showing 1-16 of 16
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Product Features

  • Helical reamers are intended for use in a CNC machine, drill press, or similar, since a lot of torque is needed to effectively drive the tool
  • Taper pin reamers are intended to ream holes for taper pins, which are a standardized fastener
  • Left-hand helical reamers are good for use in through holes (holes that extend all the way through a workpiece) in difficult or long-chipping materials, as they push chips ahead of the tool and into the hole
  • Helical reamers are recommended for reaming holes with interruptions, as they prevent damage to the workpiece edge and tool, when used in a machine with rigid toolholding
  • Uncoated (bright) tools have no finish or coating. They are a good choice for general purpose applications

Product Details

  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B003TO4VK4
  • Product Warranty: For warranty information about this product, please click here

Product Description

The Alvord Polk 155-H left-hand helical flute taper pin reamer is a round shank tool made of high-speed steel with no finish or coating, and is most commonly chosen for reaming holes in difficult or long-chipping materials that are intended to receive taper pins. Taper pins are standardized tapered fasteners with one end having a slightly larger diameter than the other end, in order to easily enter a reamed hole and hold itself through friction.

Left-hand helical reamers are useful for interrupted cuts and in through holes. Helical 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 helical style tools also push chips ahead of the tip of the tool, instead of pulling chips out of a hole. Left-hand helical reamers are also useful for reaming through holes, since pushing chips into the hole can cause clogging, which may damage the tool. Helical reamers have a more aggressive rake angle than spiral reamers. This means that while they are both used for similar purposes, helical reamers are intended to be used by a drill press or CNC machine, unlike a spiral reamer, which can be used either by hand or in a machine. Helical reamers cannot easily be used by hand, since the action of the high rake angle means that more force is needed to drive the tool, when used in manually-fed machines they will sometimes push the reamer back up out of the hole.. The round shank (minus a square section on the end) shows the user clearly that this tool is not meant to be used with a tap wrench, i.e. driven by hand. 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 materials.

For reamers in the 155-H series with taper pin size 7/0 to 9 there are three flutes, and for size 10 there are four flutes. Tolerances for machining this reamer series are +.0030 / +.0060 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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