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 4591 High-Speed Steel Taper Pin Reamer, Left Hand Spiral Flute, Round With Square End Shank, Uncoated (Bright) Finish

Be the first to review this item

Product Specifications
Cutting Direction
Right-Hand
Cutting Length
1.11/16  inches
Finish Types
Uncoated (Bright)
Shank Type
Round With Square End
Material Type
High Speed Steel
UNSPSC Code
23241617
Brand Name
Precision Twist
Flute Type
Left Hand Spiral

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 28? Order in-stock items in the next 2 days 20 hrs 5 mins and choose One-Day Shipping at checkout.

  • Share
Currently showing 1-11 of 11
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 1-11 of 11
0 Taper Pin 0.1287-0.1638" 2-15/16" 5011146 B003JY6VMA yes $31.30 Buy Options
1 Taper Pin 0.1447-0.1638" 2-15/16" 5011147 B003JY6VN4 yes $31.30 Buy Options
2 Taper Pin 0.1600-0.2010" 3-3/16" 5011148 B003JY6VO8 yes $30.13 Buy Options
3 Taper Pin 0.1813-0.2294" 3-11/16" 5011149 B003JY6VP2 yes $29.03 Buy Options
4 Taper Pin 0.2071-0.2604" 4-1/16" 5011150 B003JY6VPM yes $31.81 Buy Options
5 Taper Pin 0.2410-0.2994" 4-5/16" 5011151 B003JY6VQ6 yes $34.00 Buy Options
6 Taper Pin 0.2773-0.4220" 5-7/16" 5011152 B003JY6VQQ yes $38.56 Buy Options
7 Taper Pin 0.3297-0.4220" 6-5/16" 5011153 B003JY6VRK yes $46.02 Buy Options
8 Taper Pin 0.3971-0.5050" 7-3/16" 5011154 B003JY6VS4 yes $23.42 Buy Options
9 Taper Pin 0.4800-0.6066" 8-5/16" 5011155 B003JY6VT8 yes $71.40 Buy Options
10 Taper Pin 0.5799-0.7216" 9-5/16" 5011156 B003JY6VNO yes $87.98 Buy Options

Key Features

  • Spiral flute construction protects interrupted cuts by preventing whole-flute contact with the leading edge of the interruption
  • Reams holes to receive standard taper pins
  • Left-hand spiral design pushes chips ahead of the tool into the hole; useful for through holes
  • Uncoated (bright) tools have no additional surface treatment or coating, suitable for general-purpose applications
  • Square-end shanks help prevent rotation in the tool holder

Product Description

The Union Butterfield 4591 high-speed steel left-hand spiral flute taper pin reamer is an uncoated (bright) round shank tool with a square end, used for reaming holes that are intended to receive taper pins. This tool is often used in a drill press, screw machine, or lathe.

A taper pin is a standardized tapered fastener that has a slightly larger diameter at one end than the other so it can be inserted into a reamed, correctly tapered hole, creating a tight connection due to friction. Some taper pins have threaded ends to receive nuts. Spiral flute reamers are useful for interrupted cuts because they prevent whole flute contact with the leading edge of an interrupted cut, as in a keyway. This prevents damage to the interruption and the reamer flute. Left-hand spiral tools are good for use in through holes (extending through the workpiece) because they push chips ahead of the tip of the tool. High-speed steel (HSS) is a general-purpose steel for cutting tools that is compatible with many metalworking materials. It is often lower in price than other cutting tool substrates. Square-end shanks help prevent rotation in the tool holder.

The number of flutes on a reamer depends on the cutting diameter of the tool. Reamers in this series with taper pin sizes 0 to 8 have six flutes and those with taper pin sizes 9 and 10 have eight flutes.

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.