We specialize in hard to find items
All Categories
Dormer E651 High-Speed Steel Combined Drill and Tap, Black Oxide Finish, Round Shank With Square End, Modified Bottoming Chamfer, 7/16"-14 Thread Size
Share Tweet
*Price and Stocks may change without prior notice
*Packaging of actual item may differ from photo shown
- Electrical items MAY be 110 volts.
- 7 Day Return Policy
- All products are genuine and original
About Dormer E651 High-Speed Steel Combined Drill And
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. H
