Top 9 Best Drill Bit For Cast Iron in 2023

Donda's House

If you’re looking for the best drill bits for cast iron, then you’ve come to the right place. Cast iron is a strong material that requires special drilling tools to ensure quality and results. In this guide, we explore the different types of drill bits and the features they offer in order to help determine which one can best serve your needs.

Top 9 Best Drill Bit For Cast Iron in 2023

SaleBestseller No. 1
BOSCH CO14B 14-Piece Cobalt M42 Metal Drill Bit Assorted Set
  • 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
  • Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits
  • High-heat resistant bits – withstand high-temperature applications for extended periods of time
  • Thick web-helix design – provides additional stability in tough applications
  • Surface-hardened tip – penetrates tough abrasive materials
SaleBestseller No. 2
COMOWARE Cobalt Drill Bit Set- 115Pcs M35 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Metal Indexed Storage Case, 1/16" - 1/2"
  • 115 PIECES INCLUDED: 29pcs Fractional Size:1/16” to 1/2” in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60.
  • HSS WITH 5% COBALT: Durable, Higher Heat & Abrasion Resistance.
  • PRECISE 135° SPLIT POINT & TWIST DESIGN: Prevent walking, clear chips and particles faster.
  • PROFESSIONAL & WIDELY USE: M35 Cobalt HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials.
  • ORGANIZED HOLDER: Set includes the drill bit holder with size index for easy storage and organizing.
Bestseller No. 3
DelitonGude 21/64"inch HSS M35 Cobalt Twist Drill Bit,High Speed Steel,Pack of 5,Suitable for Steels,Cast Iron,Stainless Steel,Copper and Other Hard Metals(21/64inch)
  • Great product and very good quality. Made from M35 Hight-speed Steel and 5% Cobalt.Size:21/64inch,Total length:115mm,Work length:75mm
  • The blades are very sharp and they drill into metal fast.Including Steels,Cast Iron ,Copper,Galvanized Pipe,Aluminum Alloy,Wood, Plastic and Other Hard Metals.If you need to drill hard metal, Highly recommended use drilling press contral the RPM.Not for Glass or Ceramic Materials.
  • Full-grinding Nitriding,Good Wear resistance,Durable,Spiral groove design, well chip removal performance.135 Tip & Twist Design,Increases cutting speed with self-centering and prevents walking.
  • For Professional and DIY Use, household maintenance and repair.These are so good to save times
  • Works great and good price, Will be a good assistant in your work
Bestseller No. 4
BeHappy 29Pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Sets, Twist Jobber Drill Bit Sets for Hardened Metal, Stainless Steel, Cast Iron with Indexed Round Case, 1/16"-1/2, Black and Gold
  • 【Drill Bit Set】: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", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2". This 29 PCS M35 Cobalt Drill Bit Sets meets all your needs
  • 【Cobalt 5% HSS】: High-Speed Steel M35(Cobalt 5%)cobalt drill bit set can effectively drill tough and high tensile materials. The metal drill bit is especially suitable for cutting hard metals, such as stainless steel, cast iron, superalloys, titanium alloys, rigid plastics, and wood, It can also be used in soft materials
  • 【Characteristics】: The twist drill bit is 135°split point with a round straight shank, self-centering prevents walking, and makes drilling precise and faster. Double back Angle process and full grinding process is adopted fully ground process twist design helps clear particles faster, decreases friction and heat for a cooler drilling performance
  • 【Packaging】: The jobber drill bit set includes a portable bucket that can be hung anywhere or on your waist for easy operation. Whether you're a professional woodworker, handyman, or builder, or you're just taking on the occasional housing project as a relaxing hobby, this barrel-packed metal drill bit set has everything you need
  • 【After-sales Service】: BeHappy is a specialized tool product, buyers satisfaction is our most sought goal. If you have any doubts about our products, you can contact us, we are happy to help you solve the problem
Bestseller No. 5
Lichamp 29PCS HSS Cobalt Drill Bits Set 1/16" to 1/2" with Three Flute for Hard Metal, Hardened Stainless Steel and Cast Iron
  • UNIQUE 3X FLUTE DESIGN - Lichamp three flute patent design drill bit clears chips and particles faster, provide you with more efficient drilling experience.
  • 4X LIFESPAN MATERIAL - Made from industrial grade M35 high-speed steel with 5% cobalt provides hardness for wear resistance, withstands max 1100 degreeF.
  • MULTIPLE APPLICATION - Ideal for drilling in heavy-duty tough metal, including hard abrasive alloy metal, hardened stainless steel or cast iron.
  • SMOOTHLY DRILLING - 135-degree split point tip & twist design increases cutting speed with self-centering and prevents skating starts or walking.
  • 29PCS DRILL BIT SET - Metal index case with size chart for easy bit access and identification. Includes drill bit sizes 1/16-inch to 1/2-inch in 1/64-inch increments.
SaleBestseller No. 6
GMTOOLS 115Pcs Cobalt Drill Bits Set, M35 High Speed Steel, 135 Degree Tip, Twist Jobber Length Drill Bit Kit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case, 1/16"-1/2"
  • 115 Pieces Set Includes: 29pcs Fractional Size: 1/16 to 1/2 inch bits in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60; Set includes the drill bit holder with size index for easy storage and organizing
  • Perfect Drill Bits: Precision grinding process for a clean surface and high grinding accuracy. Universal round drill shank, widely applicable of tool holding systems and tightly clamped
  • 135° Split Point & Twist Design: The 135 degree fast cutting point is automatically centered and penetrates quickly with less pressure, reducing walking, fully ground drill bit with sharp and durable cutting edge. Twist design for clear chips faster
  • Enhanced M35 Alloy Material: These drill bits contain 5% Cobalt alloy steel, which increases wear resistance and durability. Industry grade 6542 high speed steel drill bit set, harder than 4241 HSS used in other similar drill bits set
  • QUALITY COMMITMENT: If for any reason you are not satisfied with your purchase, please contact us. We provide 30-day money back. 100% Satisfaction Guarantee for risk-free shopping!
Bestseller No. 7
Meccion TCT Carbide Hole Saw Drill Bit 40mm 1-9/16" Heavy Duty Industrial Grade Hole Cutter for Stainless Steel, Metal, Alloy, Cast Iron, Copper
  • Industrial Grade Metal Hole Cutter - Made of carbide with tungsten tipped provide superb product life and cutting performance.
  • Cut a Perfect Circles - Fast and precise cuts a hole into stainless steel sheet, metal, cast iron, alloy, brass and other tough alloys.
  • More Efficient - Sharpness and harden tipped with optimized design penetrates object with easy and smooth.
  • Adaptation - 3 flat surfaces antislip shank design, Can be used on hand held drill, bench drills, magnetic drills and other rotating machines.
  • Warm Tips - Keep the drill running evenly at a low speed for extending hole cutter life. Please add coolant when working on stainless steel and steel metal sheets above 5mm.
Bestseller No. 8
DIOBATO M42 Cobalt Drill Bit Set for Metal, Stainless Steel, Cast Iron, Wood - 13 Piece,Multiple Point
  • M42 Cobalt drill bit set for metal.Using unique process technology, each bit contains about 8% cobalt, which can easily handle common stainless steel materials and various light and medium metals
  • Size - 1/16“ 5/64" 3/32" 7/64" 1/8" 9/64" 5/32" 3/16" 11/64" 13/64" 7/32" 15/64" 1/4"
  • Multi-blade tip-design,increase the pressure on the material when drilling, and it cuts faster and more smoothly than the general 135° drill.;thick web-helix design,fast cuts with smooth chip evacuation
  • Applicable Materials - For Stainless Steel, Cast Iron, Titanium, Light Metals and Aluminum etc
  • Applicable device - CNC machine, precision drilling machine, bench drill, medium and high power electric hand drill
Bestseller No. 9
amoolo Cobalt Drill Bit Set (1/16"-1/4",13 Pcs), M35 HSS Metal Drill Bits for Steel, Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood
  • 【M35 Cobalt High Speed Steel】Industry grade M35 high speed steel drill bit set, much harder than HSS used in other similar drill bits set. These drill bits contain 5% Cobalt, which increases wear-resistance and durability.
  • 【Most Commonly-Used 13 Sizes】A complete combo set of 13 jobber length industrial drill bits for metal drilling (1/16",5/64",3/32",7/64",1/8",9/64",5/32",11/64",3/16",13/64",7/32",15/64",1/4") . They fit the majority of power drill currently on the market and comes with a portable plastic case for easy storage and organization.
  • 【Precise & Efficient Drilling Performance】✔ Fully Ground spiral groove design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance. ✔ 135° Split Point with round straight shank prevents walking and makes drilling precise and faster. No center punch is needed.
  • 【Multiple Application】Perfectly suitable for cutting through Hard Metal such as Stainless Steel, Steel, Sheet Metal and Cast Iron as well as Plastic, Aluminum Alloy, Wood and Other Softer Metals. ✔ Pay attention to speed, pressure and heat control during drilling.
  • 【90 Days Warranty】At Amoolo, we center on customer satisfaction. Get your drill bits today along with our 90-day Hassle-Free Warranty Policy, exchange or refund guaranteed for any product defect!


In conclusion, there are a variety of options when it comes to the best drill bit for cast iron. The right choice will depend on the material you’re working with and your own personal budget. Regardless, we hope our guide provided enough information to help you make an informed decision and get started drilling into your cast iron project with confidence.

Leave a Reply

Your email address will not be published. Required fields are marked *