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🔩 amoolo twist drill: cobalt stainless steel logo

🔩 Amoolo Twist Drill: Cobalt Stainless Steel Review

3

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Very good

Revainrating 4.5 out of 5  
Rating 
4.7
🪚 Industrial Drill Bits, 🔪 Cutting Tools

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Description of 🔩 Amoolo Twist Drill: Cobalt Stainless Steel

【Premium Quality】Made of industry grade 6542 high speed steel, Cobalt twist drill bits are harder than 4241/4341 HSS used in other similar bits, ideal for heavy duty hole drilling. They contain 5% cobalt material, increasing 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. 🚫NOT for Glass or Ceramic Materials. 🚫NOT for High Carbon Steel and Heat-Treated Steel. ✔ 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!.

Reviews

Global ratings 3
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Type of review

Revainrating 5 out of 5

I doubt these pieces contain cobalt at all.

With the right technique, speed, and lubrication, I was able to drill three holes in 3/16 inch thick steel with a 1/4 inch drill bit. The first hole went quite well, the second hole took significantly longer and the third hole took about 5 minutes. I doubt I'll be able to drill another hole in her no matter how much time I spend on it. I first drilled a 1/8" pilot hole before using a 1/4" bit. To be honest, the performance I've seen with this drill is worse than what I expected from a regular…

Pros
  • Power & Hand Tools
Cons
  • Not as thick as other picks

Revainrating 4 out of 5

Good price in a good set of bits.

I use them quite often in my daily work. I bought 2 sets and use them to poke holes in broken bolts and enlarge them to get them out of a bolt hole with a variety of pullers. I start with smaller bits and gradually increase the size of the bits before using the extractor. After drilling I use milling cutters to remove more metal from the screw depending on screw size and size/type of extractor. The drill bits work well since I'm working with steel bolts. I broke off a few tips and changed a few

Pros
  • Drill parts and accessories
Cons
  • Other Other

Revainrating 5 out of 5

These are high quality cobalt drill bits. Go SLOWLY to drill through the stainless steel.

WHEN DRILLING THROUGH A STAINLESS ENVIRONMENT: Based on years of experience, to drill stainless steel or other high density metals, you need to move slowly and with great pressure. First hit the metal with a center punch to create a nub guide. Start with a small piece first, like 1/8" or 9/64" if possible to make things easier. Then slowly push down on the drill bit until it starts to gnaw through the metal. If you start seeing spiraling, wavy coils of metal coming out, DO IT RIGHT! If you see…

Pros
  • Twist Drill Bit
Cons
  • So far so good