Rank
#1
#1
Drill America - GLBCOX67 #7 x 6" Cobalt Aircraft Extension Drill Bit, GLBCO Series
- Effective in drilling tough, high tensile strength materials like stainless steel, inconel and titanium
- 135° split point tip prevents drill from walking
- Round shanks allow use with a wide variety of tool holding systems
- Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
- 6" overall length for drilling where extra length for reach is required
Rank
#2
#2
Drill America DMOD7 #7 Solid Carbide Drill Bit, DMOD Series
- Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems
- 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
- Manufactured to National Aerospace Standard 907
Rank
#3
#3
Drillco 480N Series High-Speed Steel Nitro Heavy Duty Jobber Drill Bit, Black/Gold Oxide Finish, Round Shank, Spiral Flute, 135 Degree Split Point, #7 Size (Pack of 12)
- Heavy duty nitride surface treatment increases hardness for drilling stainless steel and other hard metals
- Jobber length drill bit has a midrange drilling depth
- High-speed steel (HSS) provides hardness for wear resistance
- Black and gold oxide finish resists corrosion and increases the hardness of the drill bit for additional wear resistance
- Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging
Rank
#4
#4
Drill America #7 Cobalt Heavy Duty Drill Bit (Pack of 12), D/ACO Series
- Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
- Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
- 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
- Manufactured to National Aerospace standard 907
Rank
#5
#5
Drill America - D/ASTCO7P12 #7 Cobalt Heavy Duty Split Point Stub Drill Bit (Pack of 12), D/ASTCO Series
- Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
- Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
- 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
- Ideal for portable or machine drilling
Rank
#6
#6
Drill America DWDCO7P12 #7 Cobalt Drill Bit (Pack of 12), DWDCO Series
- Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
- Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
- 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
- Ideal for drilling in tough, high tensile strength materials
Rank
#7
#7
Drill America - DWDN7P12#7 High Speed Steel Black Oxide Drill Bit (Pack of 12), DWDN Series
- 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
- Ideal for production, maintenance or portable drilling jobs
Rank
#8
#8
Drill America #7 High Speed Steel Black & Gold KFD Split Point Drill Bit (Pack of 12), KFD Series - KFD7P12
- High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
- For use in wood, metal, stainless and other hard metal drilling
- 135° split point tip prevents drill from "walking"
- Combination of hardness and toughness for wear resistance
- Black and gold drills are manufactured from premium grade high speed steel
