What are the toughest drill bits?

Asked By: Helio Moeller | Last Updated: 4th January, 2020
Category: hobbies and interests jewelry making
4.4/5 (211 Views . 41 Votes)
DRILL BIT MATERIALS
Cobalt (HSCO) is considered an upgrade from HSS because it includes 5-8% Cobalt blended into the base material. This is a great option for drilling into harder steel as well as stainless steel grades. Carbide (Carb) is the hardest and most brittle of the drill bit materials.

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Also asked, what are the best quality drill bits?

So here is my list of The 10 Best Drill Bits.

  • BLACK+DECKER BDA91109 Drill Bits.
  • Makita T-01725 Contractor-GradeDrill Bits.
  • CO-Z 5-Piece (50 Sizes) Cobalt Step Drill Bits.
  • Drill America 29-Piece Drill Bits.
  • Bosch 34-Piece Drill Bits.
  • Drill Hog 29-Piece Cobalt Drill Bits.
  • DEWALT DW1177 20-Piece Drill Bits.

Beside above, what is the best drill bit for hardened steel? Go to a hardware or home improvement store for a cobalt bit that is designed specifically for drilling through steel. You want a cobalt bit, as it's a type of high-speed steel (HSS) that has more cobalt in it and is strong enough to cut through hardened steel.

People also ask, is cobalt or titanium drill bits better?

The type of titanium coating makes a difference though. For example, titanium carbonitride coating can typically handle tougher materials than titanium nitride coating. Cobalt drill bits are best for the toughest materials, like cast iron and other metals that are particularly abrasive.

Can you sharpen cobalt drill bits?

Cobalt drill bits have a high resistance to heat, making them perfect for repeated use. But after a while, the cutting edge becomes dull and needs sharpening. If you have a bench grinder, you can sharpen the bits on your own. With a bench grinder, you can sharpen your drill bits.

35 Related Question Answers Found

Which is harder cobalt or carbide?

Cobalt (HSCO) is considered an upgrade from HSS because it includes 5-8% Cobalt blended into the base material. This is a great option for drilling into harder steel as well as stainless steel grades. Carbide (Carb) is the hardest and most brittle of the drill bit materials.

What does a metal drill bit look like?

Bits designed to drill metal have flutes that taper to a point at either a 118- or 135-degree angle. Bits with a 118-degree point are general-purpose bits, while those with a 135-degree point are self-cleaning, which means they shed shards of metal instead of allowing them to accumulate around the shank.

Are cobalt drill bits worth it?

Cobalt drill bits pros
That means they're far more durable than standard bits and win out over regular high-speed steel bits. If you need to drill very hard materials that would quickly wear down other drill bits, then this should be your go-to bit.

Which is harder titanium or cobalt?

Harder than cobalt, a titanium coating is constructed to help chips – like aluminum which tends to stick – flow through the flutes more efficiently for a cleaner drill. However, these drill bits do not have as long of a life as black oxide bits.

What kind of drill bit do I need for stainless steel?


High Speed, cobalt and titanium are some of the drill bit types used for cutting metals. As stainless steel is quite hard to cut, titanium or cobalt drill bits are used as they can easily cut through hard metals without damaging the surface.

How do I choose a drill bit?

How to Choose Drill Bits by Size
  1. Use a bit 1/64” smaller than the target hole size for softwoods.
  2. Use a bit exactly the same size as the hole when working on other materials.
  3. If you're not sure which to select, choose a drill bit 1/64” larger than the hole you wish to create.

What is the difference between HSS and cobalt?

HSS is a tool high carbon steel, containing a significant dose of tungsten. Cobalt drills are good for drilling tough materials: hardened and stainless steel. You can drill with them plastic and wood too, but cobalt bits are more brittle than regular HSS ones, so you can easily break it.

What is the best cobalt drill bit?

Below are the best cobalt drill bits, which are available in the market:
  1. Irwin Tools 3018002 Cobalt M-35 Metal Index Drill Bit Set, 29 Piece.
  2. DEWALT DW1263 14-Piece Cobalt Pilot Point Drill Bit Set.
  3. Drill America DWD29J-CO-PC Qualtech 29 Piece.
  4. Craftsman 9-64085 Professional Cobalt Drill Bit Set, 21 Piece.

What are cobalt drill bits used for?

Cobalt drill bits are particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with 5 to 8 percent cobalt.

Do you need a special drill bit for metal?


Regular drill bits can't cut through steel, so you need a heavy-duty, hard drill bit to do the job. There are two types of drill bits that you can count on for metalworking projects: titanium and cobalt. Titanium drill bits are high-speed steel drill bits (HSS) that have a titanium oxide coating.

What is the best drill bit for metal?

Cobalt bits with a 5-8% cobalt blend are the most durable and suitable for all your stainless steel projects. We recommend the DEWALT DW1361 Titanium Pilot Point Drill Bit Set or the Irwin Tools 3018002 Cobalt Metal Drill Bit Set.

What does m42 cobalt mean?

M42 high speed steel is a cobalt molybdenum tools steel, the addition of 8% cobalt means that M42 delivers superior red-hardness when compared to M2. M42 high speed steel has a heat-treated hardness in the range 68 to 70 HRC.

How do you use a cobalt drill bit?

8 Operating Tips when Drilling with Cobalt Drill Bits
  1. Tip 1 - Wear Protective Goggles. Wear face shield and gloves when operating any drills.
  2. Tip 2 - Use the Correct Drill.
  3. Tip 3 - Sharpen Cobalt Drill Bit.
  4. Tip 4 - Use Masking Tape.
  5. Tip 5 - Don't Rush.
  6. Tip 6 - Hold the Bit Straight.
  7. Tip 7 - Never Overheat.
  8. Tip 8 - Keep it Clean.

What are gold ferrous drill bits for?

Gold Ferrous Drill Bits. With a Pilot Point® Tip that starts on contact, DEWALT Gold Ferrous Drill Bits deliver clean, accurate holes, and helps to reduced lock-ups. A No-Spin Shank eliminates the bit spinning in the chuck, and a tapered web provides helps to increased durability to helps to reduce breakage.

What is a jobber drill bit?


Jobber Drill Bits
A jobber drill bit is a bit that has a long length compared to its diameter. Jobbers have a length anywhere from 8-12 or 9-14 (depending on who you ask) times the diameter.

Can I use metal drill bit on wood?

While wood drill bits are too soft to drill through metal, metal drill bits can be used on any surface. However, if you're using a metal drill bit on wood, you'll have to reduce the pressure to prevent damaging the wood. Metal drill bits require more energy because, well, you're drilling through metal with them.

What is the best lubricant for drilling steel?

For drilling holes in steel that's 1/8 in. or thicker, use cutting fluid or a multipurpose oil like 3-IN-ONE. Lubricating the bit reduces friction and heat buildup, which makes drilling easier and your bits last longer. For easier-to-drill metals like aluminum, brass or cast iron, lubrication isn't usually necessary.