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Your cart is empty.Product Description
- HSS with 5% cobalt provides hardness for wear resistance.
- 135-Degree split points are self-centering for reduced thrust and easier penetration.
- Stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials.
M35 Cobalt Drill Bit Set
A nice-to-have meric size bit set for repeated drilling in metals
- Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with 5 percent cobalt. The 5-percent alloy is known as M35 grade.
- Cobalt drill bits are a dull gold color, golden coating is corrosion resistant and increases the hardness of the drill bits.
- They are made of quality materials, cobalt drill bits tend to stay sharper longer than other types of bits.
- With cobalt drill bits often being used in much tougher conditions, you will need to sharpen yours every now and then.
135 Degree Split Point
The bits have a self-centering 135-degree split point that penetrates hard material without a pilot hole and produces small chips to reduce clogging.
Twist Drill Bit Body
High-efficiency spiral chip groove can remove chips with high-speed operation to effectively prevent chip accumulation.
Straight Shank
The straight shank design allows the drill bits for steel to be securely fastened and precision-finished.
Read Warm Tips Before Use
Stay Cool
- Friction between bit and metal will accumulate an amount of heat.
- It's necessary to use cooling liquid during drilling to keep the bit cool. Otherwise, the bit may fry(melt) or only last a short time.
- It's both ok to use lubricant oil and to pour water.
Be Vertical
- Keep the drill bit vertical with the stuff's surface to be drilled.
- Tilted bit is prone to break during drilling.
- Be sure to make both the bit and the workpiece stable.
Do It Slow
- Drilling metal requires low RPM. Please use a device of which the drilling speed can be adjusted.
- Be careful when you use an electric drill. The RPM could be set too high.
- The thicker the bit, the slower speed should be.
Right Drilling Device
- To avoid breaking, 1/16” and smaller bits are suggested to be used with a pin vise
- Thick metals are recommended to be drilled with drill press, which is more stable, and adjustable
- To have the best performance, you shouldn't drill deeper than 1/2 of the drill bits' fluting length
David Dillow
Reviewed in the United States on March 18, 2025
Nice bit set. Neither Home Depot or Lowes carries anything like this in metric.
mike rogerson
Reviewed in Canada on February 6, 2025
Worth the $ & provided increments imperial sets can’t offer.
K. Franzese
Reviewed in the United States on January 5, 2025
Sharp bits.
James R Jerwers
Reviewed in the United States on June 25, 2024
I needed to make a 23/64-inch hole in a sheet of stainless steel. The closest size that I could find was 3/8-inch which is 24/64-inch or 1/64-inch too large.These drill bits came in the 23/64-inch size that I needed and the price was most reasonable.
Danielle Schramm
Reviewed in Canada on May 17, 2024
Work really well, seem to be actual Cobalt pieces (its not that hard to produce I think?) for metal drilling projects, have worked quite well, including some (1/2 thick) steel that I couldn't penetrate with other bits. Seem to have stayed sharp, need lots of pressure (press or clamp) to get through steel, pleased with bits even if the kit is a little bit on the small side of drill bits.
Casey
Reviewed in the United States on March 5, 2024
I was having issues with my new bits. They seemed to be smaller than my other bits that have worked great for years, so I measured the diameter on them and found out they were NOT true 1/16" bits! The first picture of 1.52mm is the bits I have used for years. The second 1.41mm picture is of these bits which are advertised as 1/16", but are not. DO NOT BUY!
Martin Domingo Abraham
Reviewed in Mexico on November 4, 2024
Use todas las medidas en metal, plastico y madera y realmente me sorprendió su rendimiento, recomendable
Kitty Eagle
Reviewed in the United States on April 16, 2024
Have not used these bits, but they look like they are Quality made .
TheProfosist
Reviewed in the United States on September 11, 2023
So umm these are like decent? I bought a 10 pack of 5/64in expecting to kill one per hole in concrete. Since they weren't designed for it and a Titanium one didn't even make a full hole. Also I was using hammer mode.I only used 2 bits the first one managed 3.5 holes! Replacing the one I originally killed ive still got 7 left. I plan on buying these when I need replacements going forward. Highly recommended!
Ben M.
Reviewed in the United States on June 10, 2023
Highly recommend, I was burning up HSS bits trying to drill through SS so I could tap it for 2-56 screws, and after wasting other drill bits I decided to try these. It stayed sharp and drilled through material that 10 other drill bits couldn’t. Extremely good value, the cobalt really works!!!
Gibson59
Reviewed in Canada on September 28, 2022
Excellent bits, nice and sharp and cut into thick acrylic without any issues!
Bob K
Reviewed in the United States on April 25, 2022
I have to remove about a thousand screws from my deck. The screws are about 25 years old and are in pretty sad shape. Only about 30% of them were coming out with just a driver bit. The drive hole of the rest are stripped and are needing additional effort to extract them.While attempting this with this bit, some of the screws were driven further into the wood when the bit caught a bite in the head. That's not the direction I wanted them to go. I wound up buying a left handed bit.I believe the screws have a #2 square drive hole. An 1/8" bit tends to grab the sides of the drive hole. That usually causes the drill bit to break. Even if it's made of Cobalt. So, I'm using a 7/64 and I'm attempting to shave just a few microns of metal from the bottom of the drive hole. That's enough to give the drive bit more of the shoulders to grab onto but not enough to cause the screw head to pop off.The first 100 or so screws, that I tried extracting with this drill bit, went very well. I had to apply very little pressure to the drill to remove the thin layer of steal from the drive hole. Some time around screw 100, I started having to apply additional pressure. By inspection, I could see that that cutting edges had become dull.Having said that... it's hard to tell what caused them to become dull. There was a lot of grit and debris in the drive holes. Anyone who knows anything about cutting edges will tell you that sand and grit... while they seem soft at a macro level, they are boulders in the micro arena and nothing will dull an edge faster than a little sand and grit. In hindsight, I probably should have taken care and cleaned out the drive holes before attempting to drill them out.Considering everything, this drill bit held up very well although I will probably buy more left handed bits to finish the project.
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