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Dormer E650 High-Speed Steel Combined Drill and Tap, Black Oxide Finish, Round Shank With Square End, Modified Bottoming Chamfer

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Product Specifications
Surface Coating
Steam Oxide
Pitch Diameter Limit
6H
Material Type
High Speed Steel
Thread Type
Metric
Chamfer Type
Semi-Bottoming
Brand Name
Dormer
Manufacturer Series #
E650
Shank Type
Round With Square End
Number of Flutes
2
UNSPSC Code
23241615

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Currently showing 1-9 of 9
M3-0.5 3.15 mm 10 mm 56 mm 167861 B003JY70XE 1 $17.76 Buy Options
M4-0.7 4 mm 12 mm 65 mm 127551 B003JY70XY 9 $17.85 Buy Options
M5-0.8 5 mm 15 mm 69 mm 127568 B003JY70YI 2 $17.41 Buy Options
M6-1 6.3 mm 18 mm 84 mm 127575 B003JY70Z2 3 $19.28 Buy Options
M8-1.25 8 mm 21 mm 96 mm 127582 B003JY70ZM 2 $23.02 Buy Options
M10-1.5 10 mm 22 mm 108 mm 127513 B003JY70V6 2 $25.57 Buy Options
M12-1.75 9 mm 29 mm 113 mm 127520 B003JY70VQ 1 $36.60 Buy Options
M14-2 11.2 mm 30 mm 123 mm 127537 B003JY70WA 1 $54.75 Buy Options
M16-2 12.5 mm 32 mm 134 mm 127544 B003JY70WU 11 $23.62 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
  • 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

Product Description

The Dormer E650 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 metric 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 materials on the tool’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 E650 series all tools have two flutes and modified bottoming chamfers. This tool conforms to Dormer ISO standards and can drill and create threads to a depth one-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.

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.

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