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High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge
Round shanks allow use with a wide variety of toolholding systems
When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging
For general purpose drilling in applications where extra length for reach is required, designed to perform in a broad range of materials in the iron and steel families
Drill America DWDDL Series High-Speed Steel drill bit is for general purpose drilling in applications where extra length for reach is required. It is designed to perform in a broad range of materials in the iron and steel families. DWDDL Series drill bits are a dependable, general-purpose drill used for a variety of materials. Ideal for production or maintenance. Bright finish, which provides superior chip evacuation. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications. Round shanks allow use with a wide variety of toolholding systems . When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging.
Most Helpful Customer Reviews
i purchased two of these drill bits because i had a deep hole in a wall that included one part that was a 1/2" steel plate. i drilled through 5/8" gypsum board and a single 2x12 and when it got to steel it just barely touched it. i drilled on the steel for nearly three hours using both bits and eventually gave up with about 1/8" left to go because it was doing nothing. i went to local store and bought a milwaukee 3/4" shorter bit and was able to get to the back side of the area i was drilling and finished the job in about 30 seconds. Obviously the cutting on this bit is not hard enough for any metal application.
Only HSS drill I could find in a 5/8" diameter by 12" long. Needed a long bit to drill holes for electrical wiring that could cut through nails in my application. Wood bits (non HSS) just couldn't make it through. The problem with this bit is that it has a 1/2" shaft for drill chuck...and I only have 3/8" drills. However, I found the chuck end of the drill is unhardened, and I was able to turn it down to 3/8" using a metal lathe...that problem solved. Also, the point on this drill has a very flat sharpening angle and didn't cut well in my application. So I had to resharpen it with a steeper cut angle...another problem solved.
In final form (with new 3/8" shaft and steeper cut angle) it worked great. Too bad nobody on Amazon sells one like that.
I gave it 3 stars as a useful tool, but very limited for a whole variety of us folks with 3/8" drills....and it didn't cut well as delivered.
Works best for the project
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