Top 10 Cobalt Drill Bit 1/4 – Jobber Drill Bits

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1. BOSCH

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Bosch CO2143 1/4 In. x 4 In. Cobalt Drill Bit

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BOSCH #ad - Available in jobber length, drill point Angle is 135 degrees, full shank, Surface Coating is uncoated bright finish, Bit type is Twist. Withstands high-temperature applications for extended periods of time up to 1, 100 degreeF. Surface hardened to penetrate tough abrasive materials, aluminum and alloy steel, high carbon steel, Cuts through light gauge metal, cast iron and stainless steel. Best used for drilling into light-gauge metal, aluminum and ally steel, high-carbon steel, cast iron, stainless steel and titanium. Rigid, thick web design adds stability to bit in tough applications.
BrandBOSCH #ad
ManufacturerBosch #ad
Height0 Inches
Length0 Inches
Width0 Inches
Part NumberCO2143
ModelCO2143
WarrantyNo

2. amoolo

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Amoolo 1/4" Cobalt Drill Bit10 Pcs, Cast Iron, Stainless Steel, M35 HSS Metal Drill Bit Set for Hard Metal

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amoolo #ad - M35 cobalt high speed steelindustry grade 6542 high speed steel drill bit set, harder than 4241 HSS used in other similar drill bits set. 10pcs 1/4" cobalt drill bits10pcs - 1/4”dia 6. 35mm x 2-3/4”flute length 69. 85mm metal Drill Bits. This drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and organization.

These drill bits also contain 5% Cobalt, which increases wear-resistance and durability. 135° split point with straight shank prevents walking and makes drilling precise and faster. Not for high carbon Steel and Heat-Treated Steel. Pay attention to speed, Steel and Cast Iron as well as Wood, pressure and heat control during drilling.

Not for glass or Ceramic Materials. Multiple applicationperfectly suitable for cutting hard metal such as stainless steel, aluminum alloy and Other Softer Metals. 90 days warrantyif you are not fully satisfied for any reason, please contact us for 100% refund or replacement. Fully ground process & 135° split pointfully ground spiral groove design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance. No center punch is needed.
Brandamoolo #ad
Manufactureramoolo #ad

3. Drill Hulk

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1/4-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Pack of 12, Stainless Steel

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Drill Hulk #ad - Include: 12 pieces of 1/4-inch cobalt drill bits with case. 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. Jobber length: 1/4-inch cutting diameter, 135 degree split point, 2-3/4-inch flute length, 4-inch overall length, 3-flat shank.
BrandDrill Hulk #ad
ManufacturerDrill Hulk Ltd #ad
Part NumberDHCO33
ModelDHCO33

4. DEWALT

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1/4-Inch DWA1216, Industrial Cobalt, DEWALT Drill Bit, Pilot Point

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DEWALT #ad - Pilot point and split tip design of drill bits for wood, metal and plastic starts on contact and eliminates bit walking. Heavy-duty cobalt of deWALT drill bits delivers 4 times more life than black oxide. Drill bit has maximum speed and life in stainless steel and other hard metals.
BrandDEWALT #ad
ManufacturerDewalt #ad
Height5.75 Inches
Length1.87 Inches
Weight0.02 Pounds
Width0.26 Inches
Part NumberDWA1216
ModelDWA1216

5. Hymnorq

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Extremely Heat Resistant, Jobber Length and Straight Shank, Hymnorq 1/4 Inch Fractional Size M35 Cobalt Steel Twist Drill Bit Set of 10pcs, Suitable for Drilling in Stainless Steel and Iron

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Hymnorq #ad - Welcome to download. Try to adjust the RPM when it fails to penetrate. In most cases, including a RPM chart for several common metals, our customers would get a much better result with these tips. Manufactured to German DIN338 standard. Downloadable user guide - we've summed up some tips of drilling metals, based on our reviews and some articles on the internet.

Self centering - the 135° quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. Cobalt steel - manufactured from m35 grade cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, for much faster cutting and extra longer life span, measuring Rockwell hardness up to 67, ideal for repeated drilling in metalworking. Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks.

For metalworking - particularly successful in cutting through hard metalshardness less than HRC38° such as stainless steel and cast iron, although they can be used for softer materials like copper and aluminium, too. Not for hardened steel / high carbon steel. The bits will not "walk" or "wander". 10pc set - the set includes 10pcs of 1/4” diameter m35 grade cobalt steel twist drill bits, packed in a plastic case for easy storage and carrying.
BrandHymnorq #ad
ManufacturerHymnorq #ad
Weight0.27 Pounds
Part Numberq1-286
Model286

6. Drill America

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Drill America 1/4" x 6" Cobalt Aircraft Extension Drill Bit, GLBCO Series

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Drill America #ad - Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools. 135° split point tip prevents drill from walking. Effective in drilling tough, high tensile strength materials like stainless steel, inconel and titanium. 6" overall length for drilling where extra length for reach is required. Round shanks allow use with a wide variety of tool holding systems.
BrandDrill America #ad
ManufacturerDrill America #ad
Height2 Inches
Length6 Inches
Width4 Inches
Part NumberGLBCOX61/4
ModelGLBCOX61/4

7. HPHOPE

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HPHOPE 1/4 Inch Cobalt Drill Bits, Suitable for Drilling in Hard Metal, M35 HSS Metal Twist Drill Bits Set of 10PCS, Stainless Steel, Jobber Length and Straight Shank, Cast Iron

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HPHOPE #ad - Straight shank of this cobalt steel drill bit allows for firmly holding and accurate centering and makes drilling precise and faster. Professional & widely usejobber drill bits perfectly suitable for drilling holes as Stainless Steel, Copper, Galvanized Pipe, Aluminum Alloy, Cast Iron, Wood and Other Softer Metals.

135° split point135°quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. M35 cobalt high speed steeltwist drill bits made from m35 cobalt high speed Steel and contain 5% Cobalt, durability and extra longer life span, which increases wear-resistance, so that the drill bits last through multiple uses.

Fully ground processfully ground spiral groove design clears particles quickly, decreases friction and heat for faster drilling performance. Easy use & storagethis metal twist drill bits set includes 10pcs 1/4" cobalt Drill Bits, This drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and DIY, household maintenance and repair. Not for glass or Ceramic Materials.
BrandHPHOPE #ad
ManufacturerHPHOPE #ad
Part NumberHP200006

8. BAIDETS

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Pack of 10 PCS, 1/4" M35 Cobalt HSS Jobber Length and Straight Shank Drill Bit, Stainless Steel, BAIDETS Twist Drill Bits, Cast Iron and Other Hard Materials, Drilling for Hard Metal

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BAIDETS #ad - 10pcs 1/4" cobalt drill bits, dia 6. 35mm x flute length 63mm twist drill bits. This drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and DIY, Manufactured to German DIN338 standard, household maintenance and repair.

Perfect suitable for drilling holes as stainless Steel, Copper, Cast Iron, Aluminum Alloy, Galvanized Pipe, Wood and Other Softer Metals. Twist drill bits made from m35 cobalt high speed Steel and contain 5% Cobalt, durability and extra longer life span, which increases wear-resistance, ideal for repeated drilling in metalworking.

Fully ground spiral groove design clears particles quickly, decreases friction and heat for faster drilling performance. 135°quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. Straight shank prevents walking and makes drilling precise and faster.
BrandBAIDETS #ad
ManufacturerBAIDETS #ad
Part NumberBD003

9. BOSCH

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Bosch CO2143B 1/4 In. x 4 In. Cobalt M42 Drill Bit

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BOSCH #ad - Surface-hardened tip – penetrates tough abrasive materials. Standard bits. Thick web-helix design – provides additional stability in tough applications. Cobalt m42 drill bit – provides upgraded m42 cobalt jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum. High-heat resistant bits – withstand high-temperature applications for extended periods of time. Enhanced m42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs.
BrandBOSCH #ad
ManufacturerBosch #ad
Part NumberCO2143B
ModelCO2143B
WarrantyProduct Defects Only

10. Drill America

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D/ASTCO1/4P12 1/4" Cobalt Heavy Duty Split Point Stub Drill Bit Pack of 12, D/ASTCO Series, Drill America

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Drill America #ad - 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.
BrandDrill America #ad
ManufacturerDrill America #ad
Height2 Inches
Length6 Inches
Width4 Inches
Part NumberD/ASTCO1/4P12
ModelD/ASTCO1/4P12