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JIUWU 13pcs Tungsten Steel Cemented Carbide Twist Drill Bits, Metal Drill YG Alloy Blade, for Stainless Steel Copper Aluminum Zinc Alloy, 3 4 5 6 7 8 9 10 11 12 13.5 14 15mm

4.1 4.1 out of 5 stars 429 ratings

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3-15mm

Purchase options and add-ons

Material Chrome Vanadium Steel, Stainless Steel, Alloy Steel, Brass, Tungsten Steel, Diamond
Finish Type Chrome
Shank Type Straight
Brand JIUWU
Item Dimensions LxWxH 1 x 1 x 1 inches

About this item

  • Material: The low tungsten content of our drills is not suitable for stainless steel, aluminum alloy, colored steel and other hard metals. It mainly for pig iron and cast iron.
  • The mistake that a lot of people make is using high speed steel twist drills at high speeds. If you search for "machining speeds and feeds" you will find a lot of information about the correct speeds to run cutting tools against different types of metal. Twist drills are the category of cutting tool you are looking for.
  • As soon as the heat starts to build up on the tip, the drill bit can lose the hardness that make it a cutting tool. Using HSS drills at low rpm with cooling fluid or lubricant can provide a large quantity of successful holes in metal. TThere have chunks of carbide on the end, and carbide will make easy work of even the hardest steel, and allow you to use high rpms. (In the process of opening holes to continue to add water for cooling.)
  • High toughness, abrasion resistance, high-speed cutting for the high hardness.
  • Size: 3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm 13.5mm 14mm 15mm.

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 1 x 1 x 1 inches; 0.64 ounces
  • Item model number ‏ : ‎ FYRHZT080
  • Date First Available ‏ : ‎ September 18, 2018
  • Manufacturer ‏ : ‎ JiuWu
  • ASIN ‏ : ‎ B07HG51HJ2
  • Customer Reviews:
    4.1 4.1 out of 5 stars 429 ratings

Product Description

jiuwu Carbide Twist Drill
Material: YG Cemented Carbide + Chrome Vanadium Steel

How to use correctly

The mistake that a lot of people make is using high speed steel twist drills at high speeds. As soon as the heat starts to build up on the tip, the drill bit can lose the hardness that make it a cutting tool. Using HSS drills at low rpm with cooling fluid or lubricant can provide a large quantity of successful holes in metal. The bits that you asked about here have chunks of carbide on the end, and carbide will make easy work of even the hardest steel, and allow you to use high rpms. When drilling out the remainder of broken screws, start small and make sure it is centered. Then enlarge the hole one step at a time until you get the correct diameter for the extractor to bite properly.

high speed steel twist drills

Drills clean, accurate holes in these thin materials

sheet metal, ducts, steel, copper, brass, aluminum, plastic, wood, veneers, vinyl siding, plasterboard, PVC, stainless steel and cast iron

Looking for specific info?

Customer reviews

4.1 out of 5 stars
4.1 out of 5
429 global ratings

Customers say

Customers like the performance, versatility, and quality of the drill bits. For example, they mention that it works great, is perfect for drilling hardened steel, and is of good quality. That said, some complain about the durability, speed, and value.

AI-generated from the text of customer reviews

13 customers mention11 positive2 negative

Customers like the performance of the drill bit. They mention that it works well on glass and hardened studs.

"great tool" Read more

"...Worked like a charm, quiet as can be. I didn't even drill a pilot hole...." Read more

"These drill bits are amazing and way better than the titatium or carbide bits...." Read more

"...wherl studs are hardened for obvious reasons... Also worked well on glass as well... Same process basically...also slow to medium speed... No high..." Read more

12 customers mention12 positive0 negative

Customers are satisfied with the quality of the drill bits. They mention that they are great, excellent, and super sharp. Some say that the bits can cut hard steel and stainless steel.

"My husband says these are the best drill bits he has ever had" Read more

"...and stays for days. Otherwise, great drill set. It slayed what I wanted it to do and I only used one of the many many bits...." Read more

"These drill bits are amazing and way better than the titatium or carbide bits...." Read more

"...These are great drill bits! Just go slow and let the tool do the work." Read more

4 customers mention4 positive0 negative

Customers like the versatility of the drill bits. For example, they mention that it's perfect for drilling hardened steel, chrome moly steel, and ar500 steel.

"Work great to drill through hardened metal. Don't last as long as solid carbide bits, but far cheaper. They will get the job done." Read more

"These worked on hardened chrome moly steel. At this price I was surprised they did so well" Read more

"These are perfect for drilling hardened steel. For the price, they are hard to beat." Read more

"Good for ar500 steel..." Read more

16 customers mention8 positive8 negative

Customers are mixed about the value of the drill bits. Some mention that it's great value for price, while others say that it was a waste of money.

"...Don't last as long as solid carbide bits, but far cheaper. They will get the job done." Read more

"...Save your money and buy real carbide bit. Chinese junk. Never again." Read more

"...They cut well, the price is excellent, but C'mon Folks, these are machine drilling products you're selling here...." Read more

"...I would not recommend them they are a waste of money...." Read more

17 customers mention4 positive13 negative

Customers are dissatisfied with the durability of the drill bits. They mention that the carbide insert is thin and brittle, resulting in a cutting angle. The drill bits overheat and the tips break off. The carbide didn't hold up, and three of the tips broke on first use drilling 1/8" steel plate. The setup was too long and not as rigid as it should have been. The tips tend to snap just past the head.

"...using very low speeds and plenty of cooling, all of the bits broke after a couple of holes...." Read more

"...up was 6mm and it did remove a little metal from the EasyOut but broke very quickly. At this point I selected the 9mm and decided to go for it...." Read more

"Very durable drill bits. Went right throughcrom-vanadium steel and show no sings ofdamage or dulling on cutting edge...." Read more

"Works as told. They of course are fragile if you tilt your drill to the side. Slow and steady and they drilled through a broken ez-out. 😉..." Read more

4 customers mention0 positive4 negative

Customers are dissatisfied with the speed of the drill bits. They mention that it makes very slow progress, the setup is too long, and the bits will burn up if they are used at high speed.

"...Saved me a ton of time. Cannot beat it for the price. These are low speed bits. They will burn up like most if you drill fast. Take your time." Read more

"...Very slow progress. Enter these carbide-tipped bits; cheaper than solid carbide, but the business end is still the hard stuff...." Read more

"...This drill went through like butter. The setup was too long and not as rigid as it should have been...." Read more

"First bit I used was the numbered 3/16. Slowest speed with cutting oil and ended up with just a mark on the metal before it was junk...." Read more

Exaust manifold flange on a 1997 Ford F150 4.6
5 Stars
Exaust manifold flange on a 1997 Ford F150 4.6
I had looked at the reviews for these drill bits and what made me buy it was someone had mentioned that they had drilled through a rail road anvil no problem with these bits and had pictures to go with it. I was pretty skeptical about buying these, not a lot of positive reviews but somehow a descent rating. I had a leak in my truck's exhaust (1997 Ford F150 4.6 liter) right under my drivers seat and it was pretty noisy. The break wasn't part of the piping of the exhaust but a flange coming directly from the engine (The driver's side manifold, about a foot or 2 away from the actual engine) that had normally 2 posts coming from it in which the pipping clamped on to, one was missing, the other was solid. So when I drove it around and hit bumps it would spread open time to time, it gets loud. A shop said they wanted to replace the manifold (A lot of work, potentially days worth if posts break). I opted into buying these bits and just drilling a hole through the flange and slap a bolt in that mofo. Worked like a charm, quiet as can be. I didn't even drill a pilot hole. The drill bit that matched my bolt just sliced through that almost 1 inch steel flange no problem. My advice though (I used a basic plain jane drill, a black and decker from Walmart costing nearly nothing) wear long sleeves and eye wear. The shavings get everywhere on your arms etc. and stays for days. Otherwise, great drill set. It slayed what I wanted it to do and I only used one of the many many bits. This one time buy was well worth the fix versus shop costs. Added pics with.
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Top reviews from the United States

Reviewed in the United States on March 7, 2024
Size: 3-15mmVerified Purchase
Reviewed in the United States on March 17, 2024
Size: 3-15mmVerified Purchase
Reviewed in the United States on September 3, 2023
Size: 3-15mmVerified Purchase
One person found this helpful
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Reviewed in the United States on March 19, 2024
Size: 3-15mmVerified Purchase
Reviewed in the United States on October 17, 2023
Size: 3-15mmVerified Purchase
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1.0 out of 5 stars Useless and overprized
Reviewed in the United States on October 17, 2023
I am working with metal machines all my life, these drills are useless. Bought these to drill in 304 stainless steel using very low speeds and plenty of cooling, all of the bits broke after a couple of holes. I then switch to standard drill bits from the local hardware store with much better sucess. Stay away from this product!
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One person found this helpful
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Reviewed in the United States on February 7, 2024
Size: 3-15mmVerified Purchase
Reviewed in the United States on February 10, 2022
Size: 3-15mmVerified Purchase
4 people found this helpful
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Reviewed in the United States on May 31, 2023
Size: 3-15mmVerified Purchase
2 people found this helpful
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Top reviews from other countries

Winnipegger
5.0 out of 5 stars Works great.
Reviewed in Canada on February 7, 2024
Size: 3-15mmVerified Purchase
ROBERTO A. BLANCO
5.0 out of 5 stars great
Reviewed in Canada on April 29, 2021
Size: 3-15mmVerified Purchase
John
4.0 out of 5 stars Not as hardy as i hoped.
Reviewed in Canada on February 16, 2024
Size: 3-15mmVerified Purchase
Andy M
1.0 out of 5 stars Poor performance/quality
Reviewed in Canada on April 22, 2023
Size: 3-15mmVerified Purchase
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Andy M
1.0 out of 5 stars Poor performance/quality
Reviewed in Canada on April 22, 2023
I used 2 of the smaller bits to try to remove a broken bolt. With the first bit the carbide tips came right off. With the second one, the tip broke and the bit actually un-twisted (see picture). Either I received defective bits, or they are very poor quality. I returned the set.
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Amazon Customer
5.0 out of 5 stars Not a workhorse, but happy to have them when in a pickle.
Reviewed in Canada on February 12, 2023
Size: 3-15mmVerified Purchase
One person found this helpful
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