10 Best Drill Bits for Cast Iron 2022 – Do Not Buy Before Reading This!

Written by Dorothy Sanches

Best Drill Bits for Cast Iron 2022 – Drilling instrument is the ideal equilibrium of strong metal and our inspiration is to dig inside it.

Whenever the drill will make a power using an internal instrument, it conveys the power against the cast iron metal.

Best Drill Bits for Cast Iron 2022

#01 – Outdoor Waterproof and Weatherproof TV Cover for 55 to 58 inch Outside Flat Screen TV – Cover Size 55”W x 35”H x 5.5”D




It is impossible to turn on and off the television when it is installed. It threw the whole thing into disarray. Don’t squander your money.

My package arrived today. It took less than a minute for my son and me to put it on. It’s a little on the big side, but that’s not a problem. It appears to be well constructed. We’ll have to wait and see how long it lasts.

Our outdoor television, which is located about 3 feet from the edge of our patio roof, is in fine working order. Rain will periodically blow into our patio during storms, but the cover has so far kept the TV safe.

Although it conceals the television, we hoped for a more magical experience.


  • Works great!


  • TERRIBLE and gets wet



#02 – Hymnorq Metric Cobalt Steel M35 Drill Bits




Everything We possessed would melt if We went through it. These components make the job a lot easier. Cutting oil isn’t even used.

These aren’t made of Cobalt. They won’t drill through a class 5 bolt, but actual cobalt bits won’t have any issues. To complete the task, We needed to utilise an HSS endmill.

These are sturdy parts at a great price! It We was installing metal siding on an old tarp shed and needed to pre-drill holes in the metal structure for the fasteners. We became frustrated after breaking ten or more metal components and turned to Amazon for help.

When buying, check the ad for size and don’t buy based on a photo of drills, as the picture is blown up and these drills are all tiny.


  • Great value


  • Not proper cobalt bits



#03 – POWERTEC QDB2012 Cobalt Drill Bit




The work is satisfactory, and the cost is fair. When examined closely, it becomes clear that not all of the points have been fully sharpened. This isn’t an issue if you own a drill doctor.

These drill bits are outstanding. We’ve been utilising them to drill a lot of layers of thin, flimsy plastic that are loosely packed.

The task at hand was to drill holes in a 10 gauge stainless steel sheet. Each bit drilled 6 holes on average. We didn’t begin by drilling a smaller pilot hole.

The annealed softness of 80crv2 is comparable to that of a good Cobalt bit. These are just skateboards, after all. To me, they are completely pointless. Even if you put a lot of pressure on them, they won’t cut.


  • Excellent Drill bits and Value ~ 1.864″ ~ 47.33 mm long


  • Not perfect



#04 – Bosch Cobalt M42 C014B Drill Bit Set




They accomplished the job, but while drilling one hole in hard steel, we broke three bits. Drill using both hands to avoid the drill twisting in your hands and breaking the bit.

To drill into stainless steel, We purchased one of these bits to replace a broken Norseman Super Premium of the same size. There is absolutely no comparison: the Norseman is incomparably superior.

These cobalt pieces are more expensive than TiCN, which is more expensive than standard hardened steel, but they’re well worth it.

This product is superior in every aspect a product can be, and it is certainly a rare find. We didn’t write my evaluation until we’d spent a lot of time with the drill bits and had a lot of experience with them.


  • Superior quality and value


  • Does the job but not great



#05 – Amoolo 13 Pcs Cobalt Drill Bit Set




DRILLING THROUGH STAINLESS STEEL: We’ve learned over the years that drilling through stainless or other high-density metals demands going slowly and using consistent pressure. Begin by pounding the metal with a centre punch to create a guide-dimple.

The latest drill bits on the market today are HORRIBLE in comparison to the drill bits we’ve purchased and used throughout the years. This is particularly true for SMALL sizes. None of the brands we tried, including Bosch, Dewalt, and a few others, worked. They’re a swindler.

We’ve been working on a van makeover that necessitates a lot of metal drilling and inside support. We haven’t had any of the holes we’ve drilled dull or break.


  • Great bits


  • Totally useless



#06 – Mtsooning Twist Drill Bit Set




Because the points are scattered, they aren’t extremely precise. not impressed, and in the future, we’ll try to buy British. They’re cheap, but they’re a waste of money, and they’re just useful as a pilot hole for now.

These are a tad bigger than a genuine 1mm bit. If you don’t mind and there’s enough room on the thing you’re drilling, it’s not a problem, but they shouldn’t call it a 1mm bit.

We ordered these since my daughter is working on an epoxy project. The sharpness of the blades and the speed with which they pierced the material astounded us.

Drilled a 1 mm hole in a 1/10″ stainless steel bar that already had a.5 mm hole drilled in it.


  • Great quality


  • It works but not well



#07 – Polarized Clip On Sunglasses Over Prescription Glasses Men Women Compact Fit Non-Flip Up



As long as your glasses have a metal nose bridge, these will fit perfectly. They’re a hit with my hubby. He has those sunglass lenses that darken in the sun, but they don’t darken enough when he’s driving.

They get the job done. satisfied with them. we  used to wear over-the-glasses sunglasses, but now that We have to wear hearing aids and there are already too many items behind my ear, we’ve had to switch to clip-on sunglasses.

They appear to require cautious treatment. They are packaged in two cases, one hard plastic and the other a soft slip-in style. The hard case gives adequate protection, however it is quite difficult to open and close.

My only issue is the lenses’ long-term durability. They are divisive.


  • Great product!


  • Lightweight, easy to use, fit my glasses well



#08 – Reshape Crepey Skin Treatment Cream Wrinkle Smoothing Lotion Anti Aging Skin Care




For me, this product is quite effective. It works better with a waist trainer that is specifically designed for waist training rather than sweating.

Even if the effects aren’t instantaneous, they have helped me gain confidence in my body.

This cream was reasonably priced, had the appropriate texture, and left my skin feeling soft. We use it twice a day. It’s fantastic.

My guess is that the better the results will be the longer you utilise the product. we’ll probably give an update in a month or so.


  • Pretty Good Buy


  • Like this product really does work



#09 – BOSCH GT2000 4-Piece Carbide Tipped Glass, Ceramic and Tile Drill Bit Set , silver




These were purchased with the intention of drilling varied thickness glass bottles for lighting applications.

These cut through hardened tile without the use of a hammer, eliminating the risk of cracking the tile. Drilling through this durable tile requires relatively little effort.

There was no tile chipping and the holes were clean. Bits were colder, sliced incredibly quickly, and had lots of life left in them. Strongly suggested.

It’s fantastic! We had never drilled glass before purchasing these, so Really can’t speak to the quality of these specific bits, but because it was my first time, We rated this product five stars because we had no issues.


  • Well worth the money
  • Good Quality Cutting Bits, Worked Great!


  • Never drilled glass before; got great results from this!



#10 – NEIKO 00823A Diamond Hole Saw | 5-Piece Diamond Drill Bit Set




The bit appeared brand new after drilling 8 holes through the bottoms of sturdy mason jars. It was a piece of cake to submerge the entire piece and bit underwater water in a 1 gallon bucket. It’s great to have in your toolbox.

Also, go in small bursts. These measures will ensure that your pieces remain in good working order for a longer period of time.

It took two people to do our task. One drilled, while the other spritzed the bit with water to keep it from overheating. The pieces are made of hollow material.

This diamond pointed hole drill bit set was purchased in order to drill drainage holes in certain small pots for plants.


  • Great Value


  • Worked very well and can be used again



Related Tags:

About the author

Dorothy Sanches

Leave a Comment