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  • Union Butterfield 4533 High-Speed Steel Chucking Reamer, Straight Flute, Round Shank, Uncoated (Bright)
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Union Butterfield 4533 High-Speed Steel Chucking Reamer, Straight Flute, Round Shank, Uncoated (Bright)

Available in multiple versions

3 customer reviews

Price: $4.43 - $110.18
Product Specifications
Brand Name Precision Twist
Material Type High Speed Steel
Finish Types Uncoated (Bright)
Cutting Direction Right-Hand
Cutting Length 1.1/2  inches
Shank Type Round
UNSPSC Code 23241611

The Union Butterfield 4533 high-speed steel straight flute chucking reamer (also called a mac... Read full product description



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Product Features

  • 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

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: B003TO4VSG
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (3 customer reviews)
  • Product Warranty: For warranty information about this product, please click here

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Product Description

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.

In the Union Butterfield 4533 series, reamers 0.0400 to 0.1540” diameter have four flutes reamers 0.1562 to 0.5312” diameter have six flutes, and reamers 0.5469 to 1.5000” diameter have eight flutes. Tolerances for reamers up to 0.5000” are +0.0002 to -0.0000”; larger than 0.5000” and up to 0.7500” are +0.0003 to -0.0000”, and larger than 0.7500” up to 1.5000” are +0.0004 to -0.0000”. There is an exception for reamers that are dowel-pin sized, in which cases tolerances are +0.0000 to -0.0002”.

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.

Union Butterfield manufactures a range of machine tools, including drills, reamers, taps, dies, end mills, and made-to-order items. Formed in 1913, the company is a subsidiary of Sandvik, a Swedish machine tool corporation. Union Butterfield offices and manufacturing facilities are located in the United States.


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Customer Reviews

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Most Helpful Customer Reviews

2 of 2 people found the following review helpful By Stephen Rawlins on March 17, 2013
Size: 33/64"System of Measurement: Inch Verified Purchase
Bought this to ream out LS7 aluminum cylinder heads to clear 1/2 inch ARP head studs. Made the job effortless and painless and very quick. Highly recommended!
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1 of 1 people found the following review helpful By SEG on October 24, 2013
Size: 1/4 inSystem of Measurement: Inch Verified Purchase
What can I say. Union Butterfield has been around a long time. It will size the hole to exact deminsion. Just always turn the reamer slow and use plenty of cuting fluid.
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1 of 1 people found the following review helpful By A. K. Allen on April 4, 2015
Size: 1-1/4"System of Measurement: Inch Verified Purchase
Great reamer. I've redone my process and won't be using it much, so now it'll make a great mace in the next dark ages.
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