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Dormer E651 High-Speed Steel Combined Drill and Tap, Black Oxide Finish, Round Shank With Square End, Modified Bottoming Chamfer, 1/4"-20 Thread Size


Free Shipping Included! Dormer E651 High-Speed Steel Combined Drill and Tap, Black Oxide Finish, Round Shank With Square End, Modified Bottoming Chamfer, 1/4''-20 Thread Size by Dormer at In The National Interest. MPN: E6511/4. Hurry! Limited time offer. Offer valid only while supplies last. The Dormer E651 high-speed steel spiral flute tap and drill combination has a round shank with a square end, a black oxide finish, and a modified


Product Description

The Dormer E651 high-speed steel spiral flute tap and drill combination has a round shank with a square end, a black oxide finish, and a modified bottoming chamfer, and is used to drill holes and create UNC (Unified Coarse) right-hand threads in a range of materials. The tool drills and threads holes in one operation. Its 30-degree spiral flutes pull chips back from the tip of the tool, up and out of the hole to prevent clogging and is suitable for use in through-holes (extending through the workpiece). Its black oxide finish improves lubricity, resists corrosion, and will not chip or flake. Black oxide also helps to prevent buildup and welding of material on the tap’s cutting edge when working with iron and steel. 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. 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 E651 series all tools have two flutes and modified bottoming chamfers. This tool conforms to Dormer DIN standards and can drill and create threads to a depth one-and-a-half times its diameter. It is suitable for the ANSI 2B tolerance class: 2B is an average quality fit for commercial and industrial fasteners.

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.

Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.

Features & Highlights

  • 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
  • Black oxide finish improves lubricity, resists corrosion, and helps prevent buildup
  • Modified bottoming chamfer has additional length to reduce chip load, add tool life, and permit higher tapping speeds

Additional Information

Manufacturer:Precision Dormer
Brand:Dormer
Model:0273227
Part Number:E6511/4
Publisher:Precision Dormer
Studio:Precision Dormer
MPN:E6511/4
EAN:7320760273227
Package Weight:0.04 pounds
Package Size:0.51 x 0.51 x 0.51 inches

Dormer E651 High-Speed Steel Combined Drill and Tap, Black Oxide Finish, Round Shank With Square End, Modified Bottoming Chamfer, 1/4''-20 Thread Size by Dormer

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Dormer E651 High-Speed Steel Combined Drill and Tap, Black Oxide Finish, Round Shank With Square End, Modified Bottoming Chamfer, 1/4"-20 Thread Size

Brand: Dormer
4.8 out of 5 stars with 51 reviews
Condition: New
Lead Time: 1 - 2 Business Days
Availability: In Stock
$25.91


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