Best Cobalt Extra Long Drill Bits of 2026
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Cobalt Extra Long Drill Bits are high-quality drill bits designed for drilling through tough materials such as stainless steel, cast iron, and titanium. With their extra-long length, they are ideal for drilling deep holes, and their cobalt construction ensures durability and longevity. These drill bits are suitable for both professional and DIY use, and they come in a variety of sizes to accommodate different drilling needs. If you are looking for reliable and efficient drill bits, Cobalt Extra Long Drill Bits are an excellent choice.
At a Glance: Our Top Picks
#TOP 1
9.8
#TOP 2
9.7
#TOP 3
9.5
Top 10 Cobalt Extra Long Drill Bits
6mm x 140mm Flute x 205mm Extra Long Series HSS Cobalt Jobber Drill Bit
6mm x 180mm Flute x 260mm Extra Extra Long Series HSS Cobalt Jobber Drill Bit
4mm x 120mm Flute x 175mm Extra Long Series HSS Cobalt Jobber Drill Bit
4mm x 150mm Flute x 220mm Extra Extra Long Series HSS Cobalt Jobber Drill Bit
10mm x 185mm Flute x 265mm Extra Long Series HSS Cobalt Jobber Drill Bit
10mm x 235mm Flute x 340mm Extra Extra Long Series HSS Cobalt Jobber Drill Bit
1/16 Inch x 6 Inch Aircraft Drill Bit Extra Long Black Oxide Cobalt Extension Bit
HLOFIZI 9/64 x 12 Inch Cobalt Long Drill Bits
HLOFIZI 3/8 x 12 Inch Cobalt Long Drill Bits
sourcing map HSS Extra Long Twist Drill Bits
The sourcing map Twist Drill Bits are designed for precision and durability. With a diameter of 4mm and a length of 160mm, these high-speed steel bits are ideal for drilling through non-ferrous metals, hard plastics, and more. Their twisted design enhances cutting accuracy, ensuring the drill bit stays centred and reduces displacement during use. Additionally, the high strength and hardness of the material contribute to a longer drilling life, making these bits a reliable choice for both professional and DIY projects.
Frequently Asked Questions (FAQs)
1. What is stronger than a cobalt drill bit?
Titanium drill bits are harder than cobalt, but because they are coated, they can't be sharpened. Cobalt drill bits are made of cobalt steel, and they can be sharpened. They are also highly resistant to heat and are very hard and abrasive.
2. Is titanium or cobalt better for drill bits?
Cobalt drill bits are more expensive, but offer longer life, and are more resistant to heat than titanium drill bits. Cobalt drill bits are also tougher and can drill holes in the hardest metals. Here is a quick comparison chart that explains the key differences between titanium vs cobalt drill bits.
3. Are cobalt drill bits worth it?
Cobalt drill bits are incredibly strong. They can be operated at much higher speeds than a standard HSS drill bit. The ability to withstand heat means that cobalt bits perform for long periods without cooling or the need for cutting fluid. They are most often used to cut through hardened and abrasive materials.
4. What is difference between M35 and M42 cobalt?
A: M35 and M42 refer to the percentage of cobalt in the cobalt steel alloy. M35 is five percent cobalt whereas M42 has eight percent.
During our cobalt extra long drill bit research, we found 46 cobalt extra long drill bit products and shortlisted 10 quality products. We collected and analyzed 2,851 customer reviews through our big data system to write the cobalt extra long drill bits list. We found that most customers choose cobalt extra long drill bits with an average price of £20.00.
The cobalt extra long drill bits are available for purchase. We have researched hundreds of brands and picked the top brands of cobalt extra long drill bits, including Rennie Tool Company, Narwhal, HLOFIZI, sourcing map.
Jennifer Fraser is a licensed contractor specializing in sales, maintenance, and kitchen, bathroom, and home appliances, tools, and utilities. She owns a store in Leeds where you can get any home and tool appliance. Jenny has a degree in literature, but she combines her knowledge and experience with her degree to publish DIY articles on solving home appliances issues to keep up the family enterprise.