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Union Butterfield 4536 High-Speed Steel Chucking Reamer, Straight Flute, Morse Taper Shank, Uncoated (Bright)

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Product Specifications
Cutting Direction
Right-Hand
Cutting Length
2.3/4  inches
Finish Types
Uncoated (Bright)
Shank Type
Morse Taper
Material Type
High Speed Steel
UNSPSC Code
23241611
Brand Name
Precision Twist

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Currently showing 1-20 of 33 Next 13 »
1/4" Inch 0.2500" 6" 5010734 B003JY6UAS yes $29.87 Buy Options
9/32" Inch 0.2812" 6" 5010735 B003JY6UMQ yes $30.94 Buy Options
5/16" Inch 0.3125" 6" 5010736 B003JY6UK8 yes $26.92 Buy Options
11/32" Inch 0.3437" 6" 5010737 B003JY6UBW yes $32.16 Buy Options
3/8 " Inch 0.3750" 7" 5010738 B003JY6UJE yes $30.69 Buy Options
13/32" Inch 0.4062" 7" 5010739 B003JY6UCQ yes $33.83 Buy Options
7/16" Inch 0.4375" 7" 5010740 B003JY6ULC yes $34.40 Buy Options
15/32" Inch 0.4687" 7" 5010741 B003JY6UDU yes $33.13 Buy Options
1/2 " Inch 0.5000" 8" 5010742 B003JY6UA8 Usually ships in 2 to 5 weeks $40.40 Buy Options
17/32" Inch 0.5312" 8" 5010743 B003JY6UEO yes $35.82 Buy Options
9/16" Inch 0.5625" 8" 5010744 B003JY6UM6 yes $41.39 Buy Options
19/32" Inch 0.5938" 8" 5010745 B003JY6UF8 yes $39.44 Buy Options
5/8" Inch 0.6250" 9" 5010746 B003JY6UKS yes $41.18 Buy Options
21/32" Inch 0.6562" 9" 5010747 B003JY6UGC yes $51.27 Buy Options
11/16" Inch 0.6875" 9" 5010748 B003JY6UBM yes $48.64 Buy Options
23/32" Inch 0.7188" 9" 5010749 B003JY6UGW yes $50.98 Buy Options
3/4" Inch 0.7500" 9-1/2" 5010750 B003JY6UIK yes $51.13 Buy Options
25/32" Inch 0.7812" 9-1/2" 5010751 B003JY6UHG yes $57.95 Buy Options
13/16" Inch 0.8125" 9-1/2" 5010752 B003JY6UCG yes $53.93 Buy Options
27/32" Inch 0.8438" 9-1/2" 5010753 B003JY6UHQ yes $70.38 Buy Options

Key Features

  • Straight flute for general-purpose reaming of uninterrupted cuts in through holes and blind holes
  • Morse taper shank for accurate alignment and firm hold in the socket of a tool holder
  • High-speed steel is compatible with a variety of materials
  • Uncoated (bright) tools have no additional surface treatment or coating for use on a broad range of materials
  • 45-degree bevel at the cutting tip facilitates entry to pre-drilled holes

Product Description

The Union Butterfield 4536 high-speed steel straight flute chucking reamer (also called a machine reamer) is an uncoated (bright) Morse taper shank tool with a 45-degree bevel lead, commonly used for general-purpose reaming of uninterrupted cuts. Straight flute reamers make small, circular, and precise enlargements to through holes (extending through the workpiece) and blind holes (with only one opening). High-speed steel (HSS) is a common, general-purpose steel for cutting tools and is compatible with a variety of materials. With no coating or surface treatment, this uncoated tool can be used on a broad range of materials and provide an economical alternative to coated tools.

Taper shank tools can be self-holding or self-releasing based on the degree of taper: Small tapers are self-holding within a tool holder, while large tapers are self-releasing and will easily release from the tool holder. The shank end of a Morse taper shank tool is self-holding because friction between the tool and the tool holder prevents slippage. It is tapered to ensure accurate alignment of the tool in the socket of the tool holder. This reamer has a 45-degree bevel at the cutting tip to facilitate entry to pre-drilled holes.

In the Union Butterfield 4536 series, reamers 0.2500” to 0.5312” in diameter have six flutes, 0.5625” to 1.0625” in diameter have eight flutes, and 1.1250” to 1.5000” in diameter have 10 flutes. Tolerances for reamers up to 0.5000” are +0.0002” to -0.0000”; larger than 0.0500” 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; their 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.

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.

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