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Cobalt Drill Bits

cobalt drill bits
Digging into the quarter-inch thick hardened steel.?

I went through 3 drill bits cobalt try a piece quarter-inch thick we suppose it's steel. The reason I believe it is steel, because I know you've been exposed to at least one year without any rust or fade and is very heavy (with the exception of titanium). The steel strip thickness is ¼ x 1 ½ wide. Any suggestions about speed, bit type, lubrication, etc. is greatly appreciated!

Cobalt bits are the best. Drill small pilot holes and cool your bitte spray antifreeze on it.

Cobalt Drill Bits

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680 Drill Bits PTD Precision Twist Drill Cobalt Drill Bits. Nice Large Lot !


680 Drill Bits PTD Precision Twist Drill Cobalt Drill Bits. Nice Large Lot !


$2,000.00


Drillco 1000C Series 32 Piece Cobalt Steel Reduced Shank Drill Bit Set, Black


Drillco 1000C Series 32 Piece Cobalt Steel Reduced Shank Drill Bit Set, Black


$1,846.99


Chicago-Latrobe Jobber Drill Bit Set, Cobalt Steel, Fractional Inch, Letter,


Chicago-Latrobe Jobber Drill Bit Set, Cobalt Steel, Fractional Inch, Letter,


$1,254.32


8 PC IND COBALT SILVER & DEMING DRILL BIT HSS  3/4


8 PC IND COBALT SILVER & DEMING DRILL BIT HSS 3/4″, 13/16″, 7/8″, 15/16″,1″


$943.95


Drillco 500 Series 115 Piece Cobalt Steel Heavy-Duty Jobber Drill Bit Set,...


Drillco 500 Series 115 Piece Cobalt Steel Heavy-Duty Jobber Drill Bit Set,…


$924.00


Cobalt Finish 115-Pack 135 deg Spplit Point Tip Round Shank Twist Drill Bit Set


Cobalt Finish 115-Pack 135 deg Spplit Point Tip Round Shank Twist Drill Bit Set


$875.70


Chicago-Latrobe Jobber Drill Bit Set, Cobalt Steel, Fractional Inch, 29, TiN


Chicago-Latrobe Jobber Drill Bit Set, Cobalt Steel, Fractional Inch, 29, TiN


$852.67


KEO 55557-TiN Countersink, 6 FL, 90 Deg, 3 In, Cobalt, TiN


KEO 55557-TiN Countersink, 6 FL, 90 Deg, 3 In, Cobalt, TiN


$831.00


KEO 55617 Countersink, 6 FL, 120 Deg, 3 In, Cobalt


KEO 55617 Countersink, 6 FL, 120 Deg, 3 In, Cobalt


$645.00


KEO 55517 Countersink, 6 FL, 60 Deg, 3 In, Cobalt


KEO 55517 Countersink, 6 FL, 60 Deg, 3 In, Cobalt


$641.00


KEO 55577-TiN Countersink, 6 FL, 100 Deg, 3 In, Cobalt, TiN


KEO 55577-TiN Countersink, 6 FL, 100 Deg, 3 In, Cobalt, TiN


$637.95


KEO 55597-TiN Countersink, 6 FL, 110 Deg, 3 In, Cobalt, TiN


KEO 55597-TiN Countersink, 6 FL, 110 Deg, 3 In, Cobalt, TiN


$636.95


KEO 55577 Countersink, 6 FL, 100 Deg, 3 In, Cobalt


KEO 55577 Countersink, 6 FL, 100 Deg, 3 In, Cobalt


$632.95


KEO 55557 Countersink, 6 FL, 90 Deg, 3 In, Cobalt


KEO 55557 Countersink, 6 FL, 90 Deg, 3 In, Cobalt


$632.95


KEO 55517-TiN Countersink, 6 FL, 60 Deg, 3 In, Cobalt, TiN


KEO 55517-TiN Countersink, 6 FL, 60 Deg, 3 In, Cobalt, TiN


$631.95


KEO 55617-TiN Countersink, 6 FL, 120 Deg, 3 In, Cobalt, TiN


KEO 55617-TiN Countersink, 6 FL, 120 Deg, 3 In, Cobalt, TiN


$631.58


KEO 55537-TiN Countersink, 6 FL, 82 Deg, 3 In, Cobalt, TiN


KEO 55537-TiN Countersink, 6 FL, 82 Deg, 3 In, Cobalt, TiN


$631.58


DRAPER Assorted Metric HSS Cobalt Drill Bit Merchandiser (130 Piece) 64044


DRAPER Assorted Metric HSS Cobalt Drill Bit Merchandiser (130 Piece) 64044


$544.09


KEO 55597 Countersink, 6 FL, 110 Deg, 3 In, Cobalt


KEO 55597 Countersink, 6 FL, 110 Deg, 3 In, Cobalt


$607.00


KEO 55537 Countersink, 6 FL, 82 Deg, 3 In, Cobalt


KEO 55537 Countersink, 6 FL, 82 Deg, 3 In, Cobalt


$600.00


CO-Z 5pcs Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set with Aluminum Case


CO-Z 5pcs Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set with Aluminum Case


$22.89


Specifications Item Type: Step Drill Size: #1: 3/16″ to 1/2″ 6 Steps (3/16”, 1/4”, 5/16″, 3/8”, 7/16”, 1/2”) #2: 1/8″ to 1/2″ 13 Steps (1/8″, 5/32″, 3/16”, 7/32″, 1/4”, 9/32″, 5/16″, 11/32″, 3/8”, 13/32″, 7/16”, 15/32″, 1/2”) #3: 1/4″ to 3/4” 9 Steps (1/4”, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″) #4: 1/4″ to 1-3/8″ 10 Steps (1/4”, 3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/8″,…

DEWALT DWA1240 Pilot Point Industrial Cobalt Drill Bit Set (14 Piece)


DEWALT DWA1240 Pilot Point Industrial Cobalt Drill Bit Set (14 Piece)


$19.23


The DEWALT DWA1240 14pc Pilot Point Industrial Cobalt Drill Bit Set is designed for maximum speed and life in stainless steel and other hard metals. These bits features a pilot point and split tip design that starts on contact and eliminates bit walking along for more control. Commonly used for drilling into stainless steel, drilling into angle iron, I-Beams, and other similar metals. Set includes…

IRWIN Tools 5 Piece Left Hand Cobalt 5/64-Inch to 19/64-Inch Cobalt Twist Drill Bit Assortment (30520)


IRWIN Tools 5 Piece Left Hand Cobalt 5/64-Inch to 19/64-Inch Cobalt Twist Drill Bit Assortment (30520)


$21.45


This IRWIN 5-Piece Left-Hand Mechanics-Length Cobalt High-Speed Steel Drill Bit Set includes drill bits made of M-42 8% cobalt high-speed steel for super abrasive resistance in tough metals. The 135° split point reduces feed pressure for easier penetration without work hardening, and the heavy-duty spiral flute design produces fast chip ejection. The shorter drill bit length gives added strength …

Gyros 45-32315 Premium Industrial Grade Cobalt 115-Pieces Drill Bit Set


Gyros 45-32315 Premium Industrial Grade Cobalt 115-Pieces Drill Bit Set


$449.97


Jobber Length Cobalt Drill Bit Set for stainless steel and other hard metals….

WXLAA 10pcs Hand Craft Cobalt Drill Bit Ideal Tool HSS Steel Titanium Straight Shank Twist Diameter 1mm


WXLAA 10pcs Hand Craft Cobalt Drill Bit Ideal Tool HSS Steel Titanium Straight Shank Twist Diameter 1mm


$2.19


Features: Higher lifetime compared to normal HSS drills. Straight shank twist mainly by the shank and working parts. Tool in the highest-quality version for life daily use in the workshop. Work Department of the guide portion serves as a guide and prepare the grinding action, a spiral chip flutes made to facilitate the guide crumbs. HSS also known as high-speed steel, knife pin tool most commonly…

Neiko 12008A Cobalt Coated 1/4-inch Hex Shank Drill Bits with Quick Change Design | 13-Piece Set by Neiko


Neiko 12008A Cobalt Coated 1/4-inch Hex Shank Drill Bits with Quick Change Design | 13-Piece Set by Neiko


$24.26


ADDED DURABILITY: Set includes 13 quick change drill bits coated with cobalt for added strength and longevity;QUICK-CHANGE DESIGN: Quick-change 1/4 hex shank lets you quickly swap out bits;A BIT FOR EVERY JOB: Includes 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64 and 1/4 size drill bits;FITS ALL DRILLS: Locks easily into in hex sleeves and quick release chucks and fits …

SE 7503SD 3-Piece Power Extension Bit Set for Drills


SE 7503SD 3-Piece Power Extension Bit Set for Drills


$1.99


This power extension bit set adds versatility to your power drills with a socket adapter that has a hex bit for all power drill chucks—great to use at home, in the workshop or warehouse for hobby, hardware, auto repair, and so much more. PRODUCT FEATURES: • Driver sizes: ¼”, ⅜”, ½” • Average total length: 2-½” • Driver width: ¼” • Chrome vanadium, heat-treated steel …

Astro 1721 8mm Drill Bit For Spot Weld Drill


Astro 1721 8mm Drill Bit For Spot Weld Drill


$10.21


AST1721 Features: -8 mm drill bitThis 8 mm drill bit is for a spot weld drill.. -8mm Drill Bit. Unit Material: -Steel. Use Material: -Metal. Product Type: -Screwdriver Bits. Dimensions: Overall Product Weight: -0.05 Pounds….

JRL HSS 10 pc 1/8 Double Ended Cobalt M35 Drill Bit Set


JRL HSS 10 pc 1/8 Double Ended Cobalt M35 Drill Bit Set


$3.78


Description:10pc 1/8″ Double Ended HSS M35 Drill Bit Set *High Quality Cobalt M35 Steel Construction *135 Degree Split Point *Fully Ground10x Double Ended Drill 1/8″ Double Ended HSS M35 Drill Bit Set 2″ total length…

DMTRADE Practical Heat Treated HSS Spiral Titanium Coated Step Drill Bit Cobalt HEX Shank


DMTRADE Practical Heat Treated HSS Spiral Titanium Coated Step Drill Bit Cobalt HEX Shank


$7.84


Features: Brand new and high quality. Heat Treated HSS with Titanium Nitride Coating. New Spiral Titanium Coated Step Drill Bit that covers 10 sizes. Spiral Flute Design made the penetration faster without chipping. This Step Drill Bit is ideal for variety of materials from metal, plastic, fiberglass to wood. They also help to enlarge existing holes. Specification: Materials:HSS. Color:as the p…

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