Click for larger image and other views Image is representative of the product family. Select individual products in the table below for more specific images and product specifications

How can we improve our images or Product Specifications?

Alvord Polk 179-0 High-Speed Steel Center Reamer, 90 Degree Angle, 3-Flute, Uncoated (Bright)

Be the first to review this item

Product Specifications
Cutting Direction
Right Hand
Finish Types
Uncoated (Bright)
Shank Type
Round
Material Type
High Speed Steel
UNSPSC Code
23241611
Brand Name
Alvord Polk
Flute Type
null

This item is no longer available

These items ship for FREE with 2-Day Shipping on orders over $50. (Details)

Want it delivered on Wed, Dec 24? Order in-stock items in the next 1 day 14 hrs 23 mins and choose One-Day Shipping at checkout.

  • Share
Currently showing 1-7 of 7
Size System of Measurement Decimal Equivalent Overall Length Mfr Part # ASIN

The Amazon Standard Item Number (ASIN) uniquely identifies
the item in the AmazonSupply.com (and Amazon) catalog.

Available

If an item is currently out of stock, but has an estimated lead time, you can place an order now and we will ship it as soon as it is available.
You can also order more than we currently have in stock.
Read more about back orders in our help section.

Price  
All All All All All      
Currently showing 1-7 of 7
1/4" Inch 0.2500" 1-1/2" 05020 B002PHNGJS yes $11.30 Buy Options
3/8 " Inch 0.3750" 1-3/4" 05021 B002PHNGK2 yes $5.89 Buy Options
1/2 " Inch 0.5000" 2" 05023 B002PHNGL6 yes $17.77 Buy Options
1/2 " Inch 0.5000" 2" 05022 B002PHNGKW yes $7.32 Buy Options
5/8" Inch 0.6250" 2-1/4" 05024 B002PHNGLG yes $8.79 Buy Options
3/4" Inch 0.7500" 2-5/8" 05025 B002PHNGLQ yes $35.39 Buy Options
1" Inch 1.0000" 3" 05026 B002PHNGM0 yes $56.04 Buy Options

Key Features

  • Center reamers are meant to chamfer an existing hole, allowing for a fastener's head to be flush with the item's surface or as an intermediate step leading to another machining operation, such as tapping threads
  • 90 degree angle countersinks are used most commonly for metric fasteners
  • 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 179-0 90 degree angle center reamer is a general purpose round shank tool made of high-speed steel with no finish or coating, and is most commonly chosen for chamfering the entry of a predrilled hole, and the conical part of the hole is then called a countersink. This tool can be used in a drill press, screw machine, lathe, or other good-quality toolholder.

Countersinks, or center reamers, are manufactured with six common angles: 60 degrees, 82 degrees, 90 degrees, 100 degrees, 110 degrees, and 120 degrees. The most common of these are 82 and 90 degrees. 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.

There are three flutes for all reamers in this series. Tolerances are plus or minus a half of a degree on the angle for all reamers in the 179-0 series.

Center reamers are used to enlarge an existing hole at the entry of the hole in order to create a chamfer, in this case called a countersink. Countersunk holes are often intended to allow a screw’s head to be flush with the surface of the item being fastened. Center reamers probably obtained their name due to the use of a center reamer to clean out and refinish a “center,” which is simply a conical impression used for holding the workpiece, when machining “between centers.” Reaming positively affects the mechanical properties of the hole by producing a hole with an exceptionally smooth finish and very tight tolerance. 60 degree center reamers are used for machining between centers, 82 degree center reamers finish a hole for standard inch countersunk screws, 90 degree center reamers finish a hole for metric fasteners, and 100, 110, and 120 degree fasteners are typical countersink angles for rivets.

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.

How can we improve our Product Description?

Customer Reviews

There are no customer reviews yet.

Be the first to review this item

Go to the HomePage

Order by Phone
M-F 8am-8pm ET, Sat-Sun 8am-5pm ET 800-220-4242

My Account| Returns| Help

Website Feedback| Contact Us| Sell on AmazonSupply| Become an Affiliate

Privacy Notice| Conditions of Use

Follow Us 

© 2014 Amazon.com, Inc. and its affiliates.