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  • Dormer MTT-X E051 Powdered Metal Spiral Flute Threading Tap, For Mild Steel, Coolant-Through, TiAlN Coated, Round Shank With Square End, Modified Bottoming Chamfer
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by Dormer

Dormer MTT-X E051 Powdered Metal Spiral Flute Threading Tap, For Mild Steel, Coolant-Through, TiAlN Coated, Round Shank With Square End, Modified Bottoming Chamfer

Available in multiple versions


Price: $52.18 - $334.98
Product Specifications
Brand Name Dormer
Material Type High Speed Steel
Finish Types TiAIN
Chamfer Type Semi-Bottoming
Manufacturer Series Number MTT-X E051
Shank Type Round With Square End
Thread Style Metric
Tolerance Held 6H
UNSPSC Code 27112806

The Dormer MTT-X E051 powdered-metal steel spiral flute tap has a round shank with a square en... Read full product description



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Product Features

  • Spiral flutes for creating threads in blind holes
  • Spiral flute tap pulls chips back from the tip of the tool and out of the hole to prevent clogging
  • Titanium aluminum nitride (TiAlN) coating lubricates the tap for high-temperature stability and abrasion resistance at high cutting speeds, offering better heat resistance than titanium nitride (TiN) and titanium carbon nitride (TiCN) coatings
  • Powdered-metal steel for performance approaching that of solid carbide tools, with the toughness and shock-resistance of high-speed steel
  • Coolant-through channel with axial outlet for improved lubricant flow in blind hole tapping

Product Details


Product Description

The Dormer MTT-X E051 powdered-metal steel spiral flute tap has a round shank with a square end, a modified bottoming chamfer, an axial coolant-through channel, and titanium aluminum nitride (TiAlN) coating, and is used to create metric right-hand threads in a range of materials, with best performance in mild steel, copper and brass. The 48-degree spiral flutes of this tap pull chips back from the tip of the tool, up and out of the hole to prevent clogging, making it suitable for blind or bottoming holes (with only one opening). The internal coolant channel of this tap has an axial outlet at the tip of the tool that directs lubricant flow ahead of the tool; this feature also is most suitable for bottoming holes. The TiAlN coating resists heat better than titanium nitride (TiN) and titanium carbon nitride (TiCN) coatings, increasing tool life and performance. It also offers increased hardness compared to TiN and may reduce the need for lubricants based on the application. The modified bottoming chamfer on this tool 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). Powdered-metal steel offers performance that approaches that of solid carbide tools but with the toughness and shock resistance of high-speed steel. 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 MTT-X E051 series, taps with nominal diameters of 6 mm to 12 mm have three flutes and those with nominal diameters of 16 mm to 20 mm have four flutes. All taps have modified bottoming chamfers. This tap conforms to ISO 529 standards and can create threads to a depth two-and-a-half times its diameter. It is suitable for the 6H tolerance class: 6H is used for a normal length of thread engagement and medium tolerance quality.

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.


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