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?

Dormer E653 High-Speed Steel Combination Drill and Pipe Tap, NPT, Uncoated (Bright) Finish, Round Shank With Square End

Be the first to review this item

Product Specifications
Manufacturer Series #
E653
Surface Coating
Uncoated (Bright)
Shank Type
Round With Square End
Pitch Diameter Limit
6H
Material Type
High Speed Steel
Thread Type
NPT
UNSPSC Code
23241615
Chamfer Type
Pipe Tap
Brand Name
Dormer

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, Jul 30? Order in-stock items in the next 59 mins and choose One-Day Shipping at checkout.

  • Share
Currently showing 1-7 of 7
Thread Size Number of Flutes Shank Diameter Length of Threads 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
1/16"-27 4 0.312" 0.6875" 2.8125" 297254 B003JY7174 2 $42.63 Buy Options
1/8"-27 4 0.437" 0.75" 2.875" 297285 B003JY718S 3 $54.06 Buy Options
1/4"-18 4 0.562" 1.0625" 3.3125" 297278 B003JY7188 4 $57.07 Buy Options
3/8"-18 4 0.7" 1.0625" 3.5" 297308 B003JY719W 2 $68.61 Buy Options
1/2"-14 4 0.687" 1.375" 4.375" 297261 B003JY717O 2 $99.22 Buy Options
3/4"-14 5 0.906" 1.375" 4.5625" 297292 B003JY719C 2 $135.53 Buy Options
1"-11.5 5 1.125" 1.75" 5.375" 297247 B003JY716K 2 $208.73 Buy Options

Key Features

  • Combination drill and tap creates holes and cuts threads in one operation for efficient tooling
  • Spiral flutes pull chips back from the tip of the tool and out of the hole to prevent clogging
  • For creating and threading through holes
  • NPT (National Pipe Taper) for compatibility with a range of threads
  • Modified bottoming chamfer has additional length to reduce chip load, add tool life, and permit higher tapping speeds

Product Description

The Dormer E653 uncoated, high-speed steel spiral flute tap and drill combination has a round shank with a square end and a modified bottoming chamfer, and is used to drill holes and create NPT (National Pipe Taper) right-hand threads in a range of materials. The tool drills and threads holes in one operation. Its 27-degree spiral flutes pull chips back from the tip of the tool, up and out of the hole to prevent clogging, making it suitable for use in through holes (extending through the workpiece). The modified bottoming chamfer has additional length to reduce chip load, add tool life in difficult to machine materials, and permit higher tapping speeds.

Right-hand threads are designed to tighten when a head or nut is rotated clockwise (the most common threading direction). 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 provides an economical alternative to coated tools. The round shank with square end helps to minimize rotation in the tool holder. This tool can be used in machines, such as drill presses or lathes, or with hand tools such as tap wrenches.

In the Dormer E653 series all tools have two flutes and modified bottoming chamfers. This tool conforms to ANSI standards and can drill and create threads to a depth one-and-a-half times its diameter. It is suitable for normal pipe thread tolerance.

Combination drill and tap tools are designed to create holes and cut threads in one pass. Taps produce internal threads in previously formed holes and can be used in machines (such as drill presses) or with hand tools. Common types of taps include hand taps, spiral point taps, spiral flute taps, thread forming taps, and pipe taps. Hand taps (straight-flute taps) collect chips in the straight flutes of the tool; spiral point taps push chips through holes ahead of the tool; and spiral flute taps pull chips back from the tip of the tool, up and out the hole. Thread forming taps, also known as cold forming taps, press rather than cut to create threads in a drilled hole, and no chips are created. Pipe taps create threads in pipes and pipe fittings. Each thread type designates a thread profile and each type is identified with an abbreviation. In the U.S. and Canada, the Unified Thread Standard is the dominant thread type, including UNC (Unified Coarse), UNF (Unified Fine), and NPT (National Pipe Taper) threads, among others.

Precision Dormer manufactures cutting tools under the following brands: Precision Twist, Dormer, and Union Butterfield. The company has locations around the world, and provides 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

Become an Associate| Careers| About Us| Contact Us| Conditions of Use| Privacy Notice| Website Feedback | Returns

Follow Us 

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