Best Cobalt Steel Pilot Counterbore

wesleydrill 1' Reduced-Shank Drill Bit 1/2 Inch Shank Silver and Deming Industrial Drill Bit Fit for Home DIY and General Building/Engineering/Woodworking

  • [Specifications and Packaging]: 1 Pc reduced-shank drill bit and 1 pc plastic tube.Include Size:1″..
  • [Fitment]: Hss drill bit set for metal/ wood/ plastic. Suitable for home DIY, and general building/engineering/woodworking use..
  • [Material]: Metal drill bit used high speed steel M2 black and gold, resists corrosion, ensures outstanding durability, sharpness and capability, reduces the friction and runs cooler..
  • [Advantage]: Industrial drill bit Increases cutting speed with self-centering and prevents walking, clears chips and particles faster. The split point tip can increase the wear resistance..
  • [Special Design 135-Degree]: Cobalt drill bit 135-degree penetrates hard material without a pilot hole and produces small chips to reduce clogging..
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wesleydrill 11/16\ Reduced-Shank Drill Bit 1/2 Inch Shank Silver and Deming Industrial Drill Bit Fit for Home DIY and General Building/Engineering/Woodworking

  • [Specifications and packaging]: 1 Pc reduced-shank drill bit and 1 pc plastic tube.Include Size:11/16"..
  • [Fitment]: Hss drill bit set for metal/ wood/ plastic. Suitable for home DIY, and general building/engineering/woodworking use..
  • [Material]: Metal drill bit used high speed steel M2 black and gold, resists corrosion, ensures outstanding durability, sharpness and capability, reduces the friction and runs cooler..
  • [Advantage]: Industrial drill bit increases cutting speed with self-centering and prevents walking, clears chips and particles faster. The split point tip can increase the wear resistance..
  • [Special Design 135-Degree]: Cobalt drill bit 135-degree penetrates hard material without a pilot hole and produces small chips to reduce clogging..
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3/32-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12

  • JOBBER LENGTH: 3/32-inch cutting diameter, 1-1/4-inch flute length, 2-1/4-inch overall length, 118 degree point, straight shank.
  • MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits.
  • CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's hardness is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits.
  • APPLICATION: best used for drilling in hard metal, including stainless steel.
  • INCLUDE: 12 pieces of 3/32-inch cobalt drill bits with case.
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1/4-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12

  • JOBBER LENGTH: 1/4-inch cutting diameter, 2-3/4-inch flute length, 4-inch overall length, 135 degree split point, 3-flat shank.
  • MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits.
  • CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's hardness is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits.
  • APPLICATION: best used for drilling in hard metal, including stainless steel.
  • INCLUDE: 12 pieces of 1/4-inch cobalt drill bits with case.
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1/8-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12

  • JOBBER LENGTH: 1/8-inch cutting diameter, 1-5/8-inch flute length, 2-3/4-inch overall length, 135 degree split point, straight shank.
  • MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits.
  • CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's hardness is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits.
  • APPLICATION: best used for drilling in hard metal, including stainless steel.
  • INCLUDE: 12 pieces of 1/8-inch cobalt drill bits with case.
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3/16-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12

  • JOBBER LENGTH: 3/16-inch cutting diameter, 2-5/16-inch flute length, 3-1/2-inch overall length, 135 degree split point, 3-flat shank.
  • MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits.
  • CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's hardness is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits.
  • APPLICATION: best used for drilling in hard metal, including stainless steel.
  • INCLUDE: 12 pieces of 3/16-inch cobalt drill bits with case.
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5/16-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 6

  • JOBBER LENGTH: 5/16-inch cutting diameter, 3-3/16-inch flute length, 4-1/2-inch overall length, 135 degree split point, 3-flat shank.
  • MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits.
  • CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's hardness is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits.
  • APPLICATION: best used for drilling in hard metal, including stainless steel.
  • INCLUDE: 6 pieces of 5/16-inch cobalt drill bits with case.
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wesleydrill 9/16\ Reduced-Shank Drill Bit 1/2 Inch Shank Silver and Deming Industrial Drill Bit Fit for Home DIY and General Building/Engineering/Woodworking

  • [Specifications and Packaging]: 1 Pc reduced-shank drill bit and 1 pc plastic tube.Include Size:9/16"..
  • [Fitment]: Hss drill bit set for metal/ wood/ plastic.Suitable for home DIY, and general building/engineering/woodworking use..
  • [Material]: Metal drill bit is made of high speed steel M2 black and gold, resists corrosion, ensures outstanding durability, sharpness and capability, reduces the friction and runs cooler..
  • [Advantage]: Industrial drill bit Increases cutting speed with self-centering and prevents walking, clears chips and particles faster. The split point tip can increase the wear resistance..
  • [Special Design 135-Degree]: Cobalt drill bit 135-degree penetrates hard material without a pilot hole and produces small chips to reduce clogging..
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TEMO M35 Cobalt Spiral Flute Type Step Drill, 9 Size from 1/4 Inch To 3/4 Inch, 3/8 Inch Shank

  • TEMO M35 Cobalt Spiral Flute Type Step Drill, 9 Size from 1/4 Inch (6.4 mm) To 3/4 Inch (19 mm), 3/8 Inch (9.5mm) Shank.
  • 9 hole sizes: 1/4″ (6.35mm), 5/16″ (7.94mm), 3/8″ (9.52mm), 7/16″ (11.11mm), 1/2″ (12.7mm), 9/16″ (14.29mm), 5/8″ (15.88mm), 11/16″ (17.46mm), 3/4″ (19.05mm), with 1/16″ (1.59mm) increments. 3/8 Inch Shank with 3 flats to eliminate slipping.
  • Double spiral flutes for more efficient swarf clearance.
  • 1/4 Inch hex Shank with quick release slot to eliminate slipping.
  • Self-starting for clean holes in thin materials.
  • M35 cobalt HSS to cut stainless steel. The step drill bit is made with M35 cobalt. It is ideal for variety of materials from stainless steel, metal, plastic, fiberglass to wood. They also help to enlarge existing holes. M35 HSSCo is a high speed steel alloy made up of 5% cobalt. M35 is similar to M2, but with 5% cobalt added..
  • The addition of cobalt increases heat resistance. It is widely used in metal manufacturing because of its ability to resist wear over conventional high speed steels, allowing for shorter cycle times in production environments due to higher cutting speeds or from the increase in time between tool changes. M35 is also less prone to chipping when used for interrupted cuts..
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Drill America 1' Reduced Shank Cobalt Drill Bit with 1/2' Shank, 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.
  • Manufactured to National Aerospace standard 907.
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