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?

Union Butterfield 4531 High-Speed Steel Expansion Chucking Reamer, Straight Flute, Round Shank, Uncoated (Bright)

Be the first to review this item

Product Specifications
Cutting Direction
Right-Hand
Cutting Length
1.1/8  inches
Finish Types
Uncoated (Bright)
Shank Type
Round
Material Type
High Speed Steel
UNSPSC Code
23241611
Brand Name
Precision Twist

This item is no longer available

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

Want it delivered on Tue, Oct 21? Order in-stock items in the next 1 hr 46 mins and choose One-Day Shipping at checkout.

  • Share
Currently showing 1-20 of 41 Next 20 »
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 1-20 of 41 Next 20 »
3/8 " Inch 0.3750" 7" 5011204 B003JY6PG2 yes $58.22 Buy Options
13/32" Inch 0.4062" 7" 5011205 B003JY6P9O yes $25.76 Buy Options
7/16" Inch 0.4375" 7" 5010778 B003JY6PHQ yes $61.63 Buy Options
15/32" Inch 0.4688" 7" 5010779 B003JY6PAS yes $62.05 Buy Options
1/2 " Inch 0.5000" 8" 5010780 B003JY6P80 yes $26.09 Buy Options
17/32" Inch 0.5312" 8" 5010781 B003JY6PBC yes $67.66 Buy Options
9/16" Inch 0.5625" 8" 5010782 B003JY6PIU yes $29.48 Buy Options
19/32" Inch 0.5938" 8" 5010783 B003JY6PBW yes $71.08 Buy Options
5/8" Inch 0.6250" 9" 5010784 B003JY6PH6 yes $70.95 Buy Options
21/32" Inch 0.6562" 9" 5010785 B003JY6PD0 yes $80.01 Buy Options
11/16" Inch 0.6875" 9" 5010786 B003JY6P8K yes $83.84 Buy Options
23/32" Inch 0.7188" 9" 5010787 B003JY6PDK yes $33.69 Buy Options
3/4" Inch 0.7500" 9-1/2" 5010788 B003JY6PFI yes $51.64 Buy Options
25/32" Inch 0.7812" 9-1/2" 5010789 B003JY6PE4 yes $39.89 Buy Options
13/16" Inch 0.8125" 9-1/2" 5010790 B003JY6P94 yes $90.66 Buy Options
27/32" Inch 0.8438" 9-1/2" 5010791 B003JY6PEO yes $51.35 Buy Options
7/8" Inch 0.8750" 10" 5010792 B003JY6PIA yes $106.32 Buy Options
29/32" Inch 0.9062" 10" 5010793 B003JY6PEY yes $102.26 Buy Options
15/16" Inch 0.9375" 10" 5010794 B003JY6PA8 yes $46.26 Buy Options
31/32" Inch 0.9688" 10" 5010795 B003JY6PGM yes $46.43 Buy Options

Key Features

  • Expandable as wear decreases its cutting diameter, so it can be reground and re-sharpened to its original dimensions for increased life
  • Morse taper shank for accurate alignment and firm hold in the socket of a toolholder
  • Straight flute for general-purpose reaming of uninterrupted cuts in through holes and blind holes
  • 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 pre-drilled holes

Product Description

The Union Butterfield 4531 high-speed steel straight flute expansion chucking reamer (also called a machine reamer) is an uncoated (bright) round shank tool with a 45-degree bevel lead, commonly used for reaming of uninterrupted cuts in high-production runs on abrasive materials. An expansion reamer can be expanded using a screw in the center of the reamer as wear decreases its cutting diameter, so it can be reground to its original dimensions and re-sharpened to prevent rapid loss of reamer size or finish. This tool can be used in a drill press, screw machine, or lathe, or other good-quality toolholders.

Straight flute reamers make small, circular, and precise enlargements to through and blind holes. They can be used on a wide variety of materials. Round shanks aid accurate centering; they are designed to be held in a chuck or collet for high-torque applications. High-speed steel (HSS) is a general-purpose steel for cutting tools that is compatible with many metalworking materials, and is often lower in price than other cutting tool substrates. This reamer has a 45-degree bevel lead at the cutting tip to facilitate entry to pre-drilled holes.

In the Union Butterfield 4531 series, reamers 0.3750” to 0.9688” in diameter have six flutes, 1.0000” to 1.3750” in diameter have eight flutes, 1.4375” to 1.8125” in diameter have ten flutes, and 1.8750” to 2.0000” in diameter have 12 flutes. Tolerances for 0.3750” to 1.0000” reamers are +0.0001” to +0.0005” and tolerances for 1.0312” to 2.0000” reamers are +0.0002” to +0.0006”.

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 manufactures machine tools under the following brands: Precision Twist, Precision Dormer, and Union Butterfield. They have locations around the world, and provide tools adhering to ANSI, NAS, and DIN standards.

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.