Whether for your home or DIY projects, engineering, woodworks, or other professional purposes, owning power drills are important for drilling the perfect holes for screw insertions.
Drills are probably the first thing we buy to get started with such projects. These drill bits are basically detachable and attachable cutting instruments responsible for drilling or boring holes of various sizes & shapes.
Out of the wide range of drill bits, countersink drill bits are what will enable you to drill countersinks or depressions/dents.
There are different types of countersink bits for different purposes and materials. Metals and woods are some of the most common objects one usually has to work on.
In this article, we’ll help you find the best countersink bit for wood and metal according to your requirements. So let's take a ride through everything you need to know about making your buy.
5 out of 5
DEWALT Countersink Drill (DW2535)
5 out of 5
COMOWARE Countersink Drill Bit Set
4.5 out of 5
Snappy Tools Quick-Change 5-Pc
4 out of 5
Center Drill Countersink Lathe Bit Mill Tooling Set
4.5 out of 5
Top 8 Best Countersink Bits for Wood and Metal Reviews 2020
1. Bosch MS4041 41-Piece Drill and Drive Bit Set
You can use this toolset for the most amazing range of functions and its versatility will enable you to drill through metals, wood, and even masonry.
This set by Bosch comes with a jaw-dropping 41 pieces of various drill and driver bits along with the widest range of accessories to provide you with everything you might need!
Out of its 41 pieces of gear, 7 of them are Black Oxide coated countersink bits which is ideal for drilling metals, wood, etc. The Black Oxide layer will ensure enhanced durability by protecting against corrosion.
There are 6 different sizes of Rotary Masonry bits in this toolset. To make your life even easier, it comes with removable parts too.
You’ll have a collection of 5 different sizes of brad point bits and 2 types of spade bits. Other accessories include 6 sizes of sockets, a socket adapter, a bit holder, screwdriver, five types of insert bits of many sizes, etc.
Its assortment of bits and accessories will thus make it perfect to be used either at home or your garages, workshops, etc. with superbly versatile convenience.
And with so many pieces to keep track of, there is no need to fear any disorganization. This is because all your precious equipment will be safely tucked, arranged, and organized in a portable, lightweight, yet durable case.
- Suitable for working on wood, metals, and masonry too
- 41-piece set of the most versatile array of tools
- 7 HHS Black Oxide bits, 5 brad points, 2 spades, 6 rotary masonry
- Includes other accessories too
- Lightweight and compact case for easy portability
- Well organized sections which can be carried separately too
- VERSATILE: This set includes a wide variety of both driver bits and drill bits as well as a selection of...
- QUALITY: The included driver bits feature designs to lessen damage to the screw head and provide better...
- CONVENIENCE: With such a wide variety of bits and accessory options, this set is deal for everyday tasks...
- PORTABLE: Includes a tough job site case for secure storage, easy access, organizing and portability. The...
2. DEWALT Countersink Drill Bit Set #6, #8, #10, 3-Piece (DW2535)
This can be an ideal set for less-professional purposes but will provide enhanced convenience and versatility for your basic and simple requirements.
This set comes with three pieces of countersink bits which are amazingly compatible with screw sizes of #10, #8, and #6.
Composed of steel, they are durable, while being effortlessly straightforward to use. They come with diameters of 9/64, 11/64, and 3/16 inches, making them suitable for those particular screw sizes. The Black Oxide finish protects the bits from rusting, thus ensuring a longer lifetime of service for your needs.
These spiral tools possess four flutes with super-smooth cutting action for efficient waste removal. This product will even offer you the utmost convenience as you’ll be able to drill, counterbore, and countersink all at once!
Along with its four-cutter design, theses tapered drill bits also ensure you an impeccable finish with a superior grip that you won't find from straight bits. The nose of the bits has also been plated with nickel to ensure resistance against rust.
The bits' holders possess 1/4-inch hexagonal shanks while the Hex Shank Locking system will ensure that your accessories do not slip off. Their rubber grips make them amazingly durable and incredibly comfortable to hold and work with.
The holders will easily fit into any 3/8 or 1/2-inch drills regardless of whether they are cordless or corded. You’ll be able to efficiently and effortlessly change accessories without facing any rechucking.
The ball groove system activated by pressure facilitates speedy loading and powerful retention. So from a limited-piece set of just 3 countersink bits, they surely will deliver you with a great performance.
- 3-piece countersink bits for screw sizes of #10, #8, and #6
- Steel composition with Black Oxide finish and nickel tip for durability
- Tapered bits with 4 cutters and angle of 60°
- Enables drilling, counterboring, and countersinking at once
- 1/4-inch shank and holders compliant with any 3/8 or 1/2-inch drills
- Ball groove system for speedy loading and powerful retention
- Rubber grip for comfort and convenience
- Hex-shank lock for prevention of accessories slipping off
- The product is 3PC Countersink Set
- Easy and simple use kit
- The product is manufactured in China
- Drill, countersink and counterbore in one step
3. COMOWARE Countersink Drill Bit Set
This set consists of 7 pieces to provide you with nothing but the finest performance. You can effortlessly use them to work on wood chamfering, reaming, openings, head of the screws, etc.
Despite being the best countersink bit for wood, this set effectively works on other materials too including plywood, PVC, acrylic, MDF, and soft metals!
Out of the 7 pieces that come in the set, one is a 90° automated Center Punch composed of brass. It will enable you to mark the point of your drilling spot accurately by creating a small dent or dimple on your object. This punch is 13cm long, possesses a diameter of 1.2cm and the tip is made of carbon steel.
The other 6 are all countersink bits with 5 flutes for speedy, smooth, and efficient cutting. You'll find 6 sizes of tip diameters to choose from which are 6mm (1/4 inches), 8mm (5/16 inches), 9mm (3/8 inches), 12mm (1/2 inches), 16mm (5/8 inches), and 19mm (3/4 inches).
Each of them possesses 1/4-inch hexagonal shanks that is compatible with most power drills while also providing a better grip. The bits are coated with titanium which will ensure you extended durability by protecting against rust.
Each of the bits’ cutting teeth is staggered to ensure that the waste chips are removed away smoothly and effectively without creating noise or blockages.
So, whether for drilling wood, fiberboards, plastic, rubber, plywood, PVCs, particleboards, etc. or more, this set will have your back every time!
- 6 countersink bits of different sizes with a 90° automated Center Punch
- 5-fluted bits for efficient cutting and smooth chip removal
- 1/4-inch shanks compliant with most drills
- Composed of industrial-standard carbon steel
- Titanium coated bits provide protection against rust for enhanced durability
- PREMIUM QUALITY: Made of Industrial grade high carbon steel. Titanium coated, Durable & Long service...
- PROFESSIONAL DESIGN: 1/4 inch hex shank, fits most power tools. ALL have 90 degree on the point for sharp...
- EXCELLENT PUNCH: Perfect Helper Center Punch, Marks workpiece with a dimple to prevent screws and drills...
- WIDELY USED: Great for wood openings, reaming, chamfering, screw head and so on.Suitable for wooden...
4. Snappy Tools Quick-Change 5-Pc. Countersink Drill Bit Set
This 5-piece countersink set by Make It Snappy is another superb choice for those of you in need of a versatile yet convenient drilling tools. Composed of alloy steel that has been thru-hardened, it can surely become your go-to gear for drilling through your hard or soft woodworks.
These bits enable you to drill for making pilot holes, countersinks, and counterbore, all in one go! You can drill holes of #12, #10, #8, #6, and #4 screw sizes without hassle.
The spiral bits come in 5 different sizes of 5/64 x 3/8 inches, 3/32 x 3/8 inches, 7/64 x 3/8 inches, 1/8 x 3/8 inches, and 9/64 x 1/2 inches (drill size x counterbore). They possess hexagonal shanks of 1/4 inches which not only provides improved grip but also is compatible with most fast-change chucks & power drills.
Their 1/8-inch hex key that comes included with the set will also ensure that you can easily adjust the depth of the pilot hole so that it accurately matches the length of the screws.
A common countersink angle of 82° will also conveniently match almost all screws and you’ll even be able to work with 90° screws on softwood!
This set of countersink drill bits can be an ideal tool-set for creating dowel buttons and plugs. Its affordability and simple user-friendliness can make this set more lucrative for those of you who are into DIY or do-it-yourself projects!
- 5 countersink bits suitable for #12, #10, #8, #6, and #4 screw sizes
- Suitable for drilling wood-both hard and soft
- Made of alloy steel that has been thru-hardened for enhanced durability
- 1/8-inch hex key for controlling depth of the pilot hole matching the screw length
- Common countersink angle of 82°
- In one step, you can drill, countersink and counter bore the perfect sized hole for #4, #6, #8, #10, or...
- Snappy Tools Countersinks will drill the pilot hole and countersink or counter-bore for screws in one...
- Ideal for plugs or dowel buttons. The 1/4" hex shank can be used with power drills and quick-change...
- Experience the higher quality of Snappy Tools. Combining higher quality materials and patented...
5. Anytime Tools 5 Center Drill Countersink Lathe Bit Mill Tooling Set
Composed of great quality M2 HSS still, this set of 5 countersink drill bits can easily make its way into becoming your ideal choice for drilling through wood, PVC, etc. and even softer metals.
Different bits of 5 sizes provide you with the most versatile array of convenience! You will be able to use these as starter bits which will enable you to drill accurate holes. They can also help you drill accurate holes in your material before turning.
These bits are double-ended which will basically twofold the durability of your bits as all you’ll have to do is flip into the other side when one side no longer performs well enough. This makes it a great tool-set for drilling holes for rivets in curved or flat panels.
The bits come with 60° tips between sizes 1 to 5 and possess diameters of 3/64, 5/64, 7/64, 1/8, and 3/16 inches. They can be used in tasks such as on car bodies or fabrication of sheet metals.
Overall, this set of countersink bits can definitely be a winner with its doubled lifetime, affordable price, versatility, convenience, and accuracy.
- Double-ended bits for double the durability
- 5 sizes of countersink bits with 60° tips
- Can be used as starter bits for drilling superbly accurate holes
- Can drill accurate holes before turning
- Great for working on wood, PVC, soft metals, etc.
- Top Quality M2 HSS
- Drill accurate center holes in material prior to turning, or use as a starter bit for accurate holes
- Sizes 1, 2, 3, 4 and 5, 60° tip angles.
6. IRWIN Countersink Drill Bit Set for Metal, 5-Piece (1877793)
Specially designed for working through the toughest of metals, IRWIN countersink drill bits are composed of industrial-standard High Speed Steel with a Black Oxide finish.
As a result, they are more durable and resistant to any form of corrosion. The five-fluted design not only makes these bits smoother and more effective to cut through metals, but also waste removal becomes much easier.
This will hence lead to a seamless operation with reduced vibrations, aiding to the convenience in your drilling operations. Apart from metal, you will also be able to drill through wood and plastic effortlessly without any setbacks whatsoever.
The bits come with tip diameters of 1/4, 3/8, 1/2, 5/8, and 3/4 inches and possess countersink angles of 82°. This will make them compatible with most of the standard screw sizes quite easily.
Each of the bits possesses 1/4-inch shanks that are rounded, leading to all of them being incredibly compatible with any drills that are either stationary or handheld. The set includes a compact and lightweight drawer case too which will ensure easy portability.
All things considered, this is the best countersink bit for metal. This mini set will surely be a powerhouse of a tool to meet all your heavy and light-duty drilling needs.
- Great for metals due to its HSS with Black Oxide coated composition
- Five-fluted bits for smooth cutting, less vibration, and efficient waste removal
- Great for wood and plastic as well
- 1/4-inch rounded shanks are compatible with both stationary or handheld drills
- Compact and light drawer-case for convenient portability
- Precision ground 82° tip for countersinking most machinable metals, wood, and plastic
- Made from industrial grade high speed steel for increased durability
- Includes a black oxide finish for added corrosion resistance
- Five-flute design reduces vibration for smoother drilling and extended life
7. Rocaris 23-Pack Woodworking Chamfer Drilling Tool
If you are someone who needs a little bit of everything, this 23-pack set could be the gear pack of your dreams!
Along with countersink bits, this pack also includes an automated center punch and 8 cutter drills for wood plugs.
The center punch will enable you to make markings on your working material so that you can create accurate holes without the bits wandering about.
The eight woodcutters are composed of carbon steel for durability and possess shanks of 3/8 inches each. You’ll be able to use these cutters effortlessly to make plug cuttings with lengths of 26mm, 25mm, 23mm, and 22mm. They can also be used for hiding blemishes or holes of the screws via tapered wood plugs of 5/8, 1/2, 3/8, and 1/4 inches.
The first set of 6 countersink bits are composed of HSS with a titanium coating. This makes the bits durable and helps them to remain sharp for longer.
These bits are designed with five flutes which makes them incredibly smooth to work with as they can cut through your materials almost as smoothly as cutting through butter.
The 5-flute design also helps to get rid of wastes more efficiently due to the ridges in between. The edges involved in cutting are polished to ensure lower friction levels for a smoother operation.
Thanks to its extra hardness, strength, and sharpness, these bits can be used to cut through thick wood, wooden planks, particleboard, fiberboard, plastic, plywood, aluminum board, etc.
The next set of countersink bits consist of 7 bits composed of High Speed Steel and come with 3/8-inch rounded shanks. They are designed with three-pointed spiral tips and come with an L-shaped wrench.
They are also incredibly resistant to scratches and abrasions and the chamfers of five edges will efficiently remove sawdust as you keep working. This will facilitate you with tasks related to wood-working chamfer or wood drilling.
With so much versatility and convenience, it can be an ideal choice for professionals or those in need to operate on various types of materials.
- 23-piece set with everything you might ever need
- 6 five-fluted HSS countersink bits with titanium coating
- 7 three-fluted spiral countersink HSS bits
- 8 cutter drills for wood plugs with 3/8-inch round shanks
- One L-shaped wrench and one automated center punch
- Package included 23pcs woodworking chamfer drilling tool, 6pcs 1/4" Hex Shank HSS 5 Flute 90 Degree...
- 3/8" shank 8pcs wood plug cutter drill bit set made of durable carbon steel material,used for tapered...
- 1/4" hex shank 5 flute countersink drill bit made of high speed steels and with 6 different diameter...
- 7pcs three pointed countersink drill bits made of high speed steel with good abrasion resistance and...
8. Amana Tool - (55227)
This bit will provide you with the luxury and convenience of drilling the pilot hole along with tapered countersink all at once in a single step!
It adopts a rotating depth-stop which is adjustable and fit for heavy-duty usage. The depth stop features a powerful Thrust ball bearing which will facilitate effortless countersink depth adjustment, and that too, without the mess of abrasions or surface burns.
Composed of M2 High Speed Steel and carbide tip, this drill bit possesses a 1/4-inch hexagonal shank and has a tip diameter of 3/8 inches. It owns a tip angle of 82° which is compatible with most screws.
This particular bit also consists of an open area that facilitates smooth and effective removal of chips and wastes, thus ensuring a clog-free, seamless operation. Its depth stop will enable you to adjust the length of the drill with your eyes closed as there’s no need to detach it every time.
Amana tool can be your ideal apparatus to drill through wooden materials accurately and flawlessly without breaking a sweat. Since it is resistant to surface burns and scratches, you can expect it to last longer too!
- Depth stop adjustability feature for easy control of length
- The depth-stop can withstand heavy-duty usage
- Open area for smooth waste removal
- Can drill a pilot hole and tapered countersink at once
- M2 High Speed Steel composition with carbide tip
- (A°) angle 49°
- (B) Cutting height 3/64-3/8
- (D) Diameter 3/8
- (D) shank 1/4
Comparison Chart of Best Countersink Bit for Metal and Wood
Size Of Shank
Type Of Bit
Bosch MS4041 41-Piece Drill and Drive Bit Set
DEWALT Countersink Drill Bit Set 3-Piece (DW2535)
Stainless Steel inside, nose coated with nickel, Black Oxide finish
60° Four cutter
COMOWARE Countersink Drill Bit Set- 7 Pcs
1/4 inches Hex
Industrial-standard high-quality carbon steel
90° Centre 5 Flute
Snappy Tools Quick-Change 5-Pc
1/4 inches Hex
Alloy steel that has been thru-hardened
Anytime Tools 5 Center Drill Countersink Lathe Bit Mill Tooling Set
Top-grade M2 HSS (High Speed Steel)
60° Tip angles of sizes 1-5
IRWIN Countersink Drill Bit Set for Metal, 5-Piece (1877793)
1/4 inches round
High Speed Steel with Black Oxide Finishing
82° Five Flute
Rocaris 23-Pack Woodworking Chamfer Drilling Tool
6 with 1/4 inches hex; 7 with 3/8 inches round
High Speed Steel with Titanium coating
First 6- 90° 5 Flute,Next 7- Three-pointed spiral
Amana Tool - (55227)
1/4 inches hex
M2 High-Speed-Steel (HSS)
82° Carbide tip
Countersink Bit Buying Guide For Wood and Metal
As one might expect, all countersink drill bits are composed of metals. But there is a wide array of metal compositions to choose from. Each type and finishing type makes the bits ideal for particular purposes and suited for specific objects. Options to choose from include-
Bits made up of carbon steel is the ideal material to drill through wood or similar materials. But if you intend to drill metals too, steer away from this option as carbon steel, though strong enough, tend to get heated up too fast.
This material will result in an incredibly strong and durable option. Cobalt countersink drill bits are basically composed of cobalt and super-strong steel alloy. This results in the end material becoming ultra-strong.
Its capacity of spreading heat evenly makes it extra durable too. You can thus use these bits for drilling through even the strongest of metals; including stainless steel, aluminum, etc. and more!
HHS (High-Speed Steel):
This is the better version in terms of quality compared to the carbon steel drill bits. Composed of a mixture of molybdenum or tungsten and alloy metals, this material can endure and deal with heat far better than carbon steel.
As a result, unlike carbon steel which is mainly ideal for wood, you can use HHS for drilling through materials as well such as fiberglass, PVC, and even soft metals!
HHS Black Oxide:
It is the ideal option if your work environment is more wet or humid. This is because this upgrade of the HHS material comprises a coating or finish of Black Oxide. The perk of this is that not only will it protect the bits against rusting or corrosion, but will also offer you enhanced durability.
It can thus be perfect to use for drilling materials such as soft or hardwoods, metals, PVC, fiberglass, etc.
It’s another improved version of HHS drill bits that come with a coating of titanium. This results in lower levels of friction, thus ensuring that your countersink drill bits’ points remain sharper for longer periods of time and usage.
Due to their enhanced longevity of sharpness, they can definitely be the more cost-effective and durable option.
Designed to be harder, these bits can become your exclusive option for drilling through masonry, tiles of ceramic, etc. Their hardness makes them ideal for drilling through such materials but they are not recommended for wood or metals as much.
This is mainly because- though harder than HSS, countersink drill bits of this material tend to be more brittle, which is not a favorable feature for drilling metals or wood.
Working Surface Material
Deciding on which countersink bit to go for is heavily dependent on the type of material you intend to work on. As we just saw above, various materials of composition are suitable for various materials.
So if you are going to be working on wood, metal, or other materials, choose your bits accordingly to obtain perfect performance and outputs.
The diameter of the countersink bit for drilling is what will determine the size of the holes produced upon drilling. As each bit will offer only one diameter, owning a single bit will limit your flexibility and convenience if you require to produce versatile products.
This is where a set of multiple countersink bits can save your day as you’ll have access to a range of bit diameters that will allow you to drill holes of various sizes.
It is also crucial to ensure that the diameter of your countersink is similar, if not identical, to the head of the screw you are using. This will ensure that the screw fits perfectly without being swallowed by the oddly bigger craters of too wide holes.
The countersink angle should synchronize with the screw head as it will facilitate the screw to fit in more perfectly enabling all parts of the screw top to be supported.
You'll get access to these kinds of countersinks that are shaped into cones. These cone shapes are what will offer you six variants of chamfer angles, those include 120°, 110°, 100°, 90°, 82°, & 60°.
The angle you are most likely to encounter in Canada and the USA is 82°. You’ll find it easier to work with this chamfer angle as it will fit in perfectly with all screws.
Another common angle after the 82° is the 90°. These have been designed according to the ISO Standard. They are more recognized overseas but thankfully, you’ll still be able to work with 82° screw heads with the 90° countersinks.
Variation of Bits
Out of the most common countersink drill bit types, a few are as follows-
They come equipped with either one, three, four, five, etc. flutes. The more flutes there are, the better your countersink bits will be for efficiently and smoothly cutting out wooden or metallic objects.
With a conical or pointed tip, these bits come with a relatively short shank along with an extended countersink.
Some flutes scrape off the material to make the cut or hole, while others shave away. And in order to conduct a smooth operation, the spaces between the flutes are what get the job done. For efficient and smooth removal of the cuts, the edges of the flutes must be sloped or angled in a way so as seamlessly carry wastes away.
Not only is this feature vital to make clean cuts and flawless drill holes, but inefficiency to get rid of the trimmings will also result in your drill bits getting jammed or stuck. This will lead to a bucket-load of friction, causing the bits to heat up. As a result, the durability of the bits will significantly decrease.
The perk of opting for many-fluted bits is that they'll remain sharper for longer and can be a good choice for drilling strong materials. This is because the drill-impact is evenly distributed among the many flutes, thus reducing the forces induced on each flute.
This is basically a countersink drill bit without any flutes. But these bits possess an angled hole pierced through them. These are more efficient when it comes to drilling holes as the trailing edge of that hole can more seamlessly and effectively cut through the material.
It can also remove waste more efficiently than the regular fluted bits, resulting in more flawless, smooth cuts. But do bear in mind that this type of bits is more expensive than your regular fluted ones.
Unless you require to produce professional or high-profile tasks, multiple fluted would be a wiser bet. So choose according to your requirements, budget, and durability.
Shank Size & Type
To facilitate a convenient and accurate drilling experience, a good grip is mandatory. And to ensure the perfect grip is where shanks of various sizes and shapes appear.
Some bits can only work with their particular brand or specific few brands with their unique shank sizes and styles. More common forms include shanks with 3 flats, rounded shanks, or hexagonal ones.
A common size of shanks is the 1/4-inch ones and can be either hexagonal or round. Since drilling tougher materials such as metals require bigger exertion of force, it is crucial for heavy-duty countersink bits to possess an enhanced grip. Which is why hex shanks can easily be the better option in such cases.
Shanks that come with triple flats will make sure that the bits are more non-slip, while rounded ones can be more dependable when it comes to centering. Whichever size or style you'll go for is entirely reliant on the bit holder of your intended tool.
Regular twisted countersink bits tend to have shank sizes similar to their diameter. The fancier and thicker ones, on the other hand, usually possess relatively smaller shanks in comparison to their diameter in order to provide you the convenience of using them with the same tool.
Screw Size Compatibility
Another aspect you need to keep in mind is the size of the screw you want to use. So ensure that you have the correct bits for each of your screws. Screw sizes can range from #0 to #14 and more, based on which, you have to opt for the tip diameters.
It is vital that the size of holes drilled perfectly fit the screws as or else, it would become too loose or too tight for the screw to go through. This will likely result in a fitting that’s either not strong enough or will damage the material.
When it comes to all-in-one countersink drill bits, setscrews will enable you to adjust the bit according to your screw size. When drilling, especially tougher materials such as metals, the drills undergo a ton of force and the setscrews must be able to endure that degree of aggression.
Failure to withstand it will either result in the bits breaking and parts flying everywhere. And if the grip of the setscrews isn’t strong enough either, the massive force may result in the setscrews sliding, which will lead to incorrect depths of the cuts made.
So in order to ensure that they have a good grip, larger isn’t the solution as one might naturally assume that bigger ones will be more durable. It is the grip that matters, which is dependent on the fineness of their threads. Hence, when making your buy, opt for durable and finely-threaded setscrews.
Frequently Asked Questions (FAQs)
1. How to Differentiate Between Countersink Drill Bits for Wood and Metals?
Ans: As you are pretty clear about by now, different types of bits are suitable for different materials.
Hence, it is crucial that you get your things in order and decide which material you intend to use your bits on-metal or wood. If you require to work on both, opt for bits that work ideally on both materials. Or, you could just opt for a countersink drill bit set of numerous bits that are suitable for each material.
The composition material of the bits plays a key role in deciding which material it can work best on. Taking a glimpse at the buying guide discussed above will surely clarify which composition material will be ideal for wood and which will be better suited for metals.
For example, carbon steel will be ideal for wood but not for metals. HSS or High Speed Steel can be an ideal pick for woods and soft metals. HSS with Black Oxide is great for metals and both soft and hard woods; while HSS titanium will remain sharper than the rest for longer.
Now the drill bits for wood and metal may seem basically the same, but closer observation will give away what material they are most suitable for. In case of appearance, bits may appear in multiple arrays of colors including gold, copper, black, silver, etc.
But you'll notice that usually, countersink bits for metals are black or deep gray in color. This is because they comprise special coatings of other substances such as Black Oxide or Titanium. Bits for wood, either hard or soft, usually tend to be silver as no special coatings are involved.
Another significant difference between the two is the tip design. If you look closely enough, you’ll find that drill bits for wood usually possess a pointed tip; also known as brad. This enables to cut the wood precisely inhibiting the wandering of the drill bit as it turns to make the hole.
The ones for metals, on the other hand, possess tips that are angled up to several degrees such as 135°, 120°, 118°, 110°, 100°, 90°, 82°, 60°, etc. so as to match the screw head angle.
2. What Will Happen If I Choose the Wrong Type of Bit?
Ans: What might be best for drilling wood might not be ideal for metals as metals are much tougher. One the other hand, an ideal bit for metal may be a nightmare for your wooden objects as too-aggressive operations may damage them.
Because you see, each bit has been specially designed to cut through a particular type of material smoothly and perfectly.
Countersink bits for drilling through wood have not been designed to be strong enough to drill through something as tough as metals. If you attempt to use them to drill metals, you’ll basically be wearing out your bits without getting your job done properly or even at all.
This could damage the freshness of your metal, especially if the metals are thin, as you would be left with quite a significant amount of scratches/abrasions.
On the other hand, if you opt for doing the opposite, i.e. using bits for metals on wood, things are definitely going to be no better. As drills for metals work on tough materials in comparison to wood, they are far more aggressive.
Hence, using them to work on your wooden materials will almost surely damage your object in one way or another. They would either crack, get splintered, or worse- entirely split down the entire length. Even if you can manage to get the bit in without causing much damage, it will severely ruin the object on its way out.
3. How Important is It to Match The Countersink Angle With The Screw Head?
Ans: This is dependent on a few aspects. Say you have a countersink of 90° on which you intend to use an 82° screw. When you do so, what happens is that the bottom of the screw gets to make contact with the countersink. But the top and sides of the screw remain open and unsupported.
And this happens due to the 8° difference between the screw head and the countersink angle. There is, of course, a way to fix this. You'll need to tighten the screw by pushing down harder to close that gap. But you'll be extending the countersink by force with the overdriving.
But this will not be an issue if you are working on softwood or other soft materials as you’ll barely notice the difference. The matter of concern rises when you’re working with hardwood, metals or any other tough materials.
So when working with harder objects, it will be ideal for you to match the screw head angle with the countersink angle. In other cases, you can easily make do with a slight difference.
4. How are Countersinks and Counterbores Different from Each Other?
Ans: A countersink is a conical shaped dent or hole that's quite shallow. But it has enough depth to enable the screw head to fit in perfectly or a little below your material surface.
A counterbore, on the other hand, is a wider hole above and around the countersink that is smoother too. Their diameters are larger than the screw head unlike countersinks.
They will enable you to entirely hide the screws via any filler materials or wooden plugs. Counterbores are the ideal choice if you don’t want your designs to be interrupted by visible screw heads.
5. What Can Be Done to Prevent Chatter of Countersinks?
Ans: Chattering leads to the edges of the holes being rough instead of providing a smooth finish. A severe case of it may even result in hexagonal edges instead of rounded holes. There are many reasons why chatters may occur.
One of the main reasons for this is that your drill bits are probably too blunt or not sharp enough. So ensure that the bits you intend to use are optimally sharp. Using the incorrect speed is also another cause so make sure to keep the drill speed under control- neither too high nor too low.
Another main reason this issue arises from is your drill alignment. This mainly happens when using a handheld device that results from not having the exact center as that of the pilot hole.
Hence, to avoid this mess, opt for either an all-in-one-drill & countersink, or go for a drill press. Either way, also ensure that the material you are working on is securely clamped. Otherwise, the vibrations from the impact will cause them to move and result in incorrect drills.
Another option you could go for is by drilling the countersink and then drilling through the middle. But do keep in mind that you might struggle to drill a countersink without the pilot hole as the bit will tend to wander about.
6. Are Tapered Bits Or Straight Bits Better?
Straight bits are, well, straight. It is pretty self-explanatory. They have the same diameter from the shank to the tip.
And then there are the tapered bits. Though they both can get the job done perfectly, tapered ones sure tend to offer more perks.
The tapered bits look like they have a wire wound-up around them that sunk into the metal. It thus seems like an embedded spiral pattern from the shank and all the way up to the tip. They are mainly used for brass screws that are cut-thread-the regular screws with which we, the general public, are more familiar with.
The lucrative aspects of a tapered bit are as follows-
- They can create a clearance hole that is truer, allowing the screw to smoothly and firmly reach and set into the pilot hole. The clearance hole is basically the hole above the pilot hole that aids the screw to be pulled into the pilot tightly and easily.
- Tapered countersink bits are also fluted more deeply, allowing a speedier, smoother, and more efficient drilling with far lower efforts.
- They offer extra contact with the thread, and as the screw sets in deeper where the hole keeps getting narrower, the screw threads can cut into the material more deeply and tightly. As a result, they offer enhanced grip.
While tapered bits have so much to offer, there is still one small blip. The taper around the countersink bit results in a slightly larger opening around the countersink. This can lead to more residual waste accumulating, which, if stuck, can increase the friction. And this may have a little effect on your bits’ durability.
Whichever style you go for, just make sure that the tool you intend to attach the bits to is compatible with the bit shanks.
7. How Do I Ensure Safety During Drilling?
There’s no doubt that drilling might feel like quite the dangerous task. In order to work on your projects more safely, here are some steps you can abide by:
- Avoid moving or shaking your drilling tool when it is actively drilling
- Make sure that the bits are safely and securely attached to prevent them from breaking off and flying everywhere due to the extensive force
- Get rid of any flammable materials in your work area as metal drilling can release sparks of fire from the impact
- Start working with a clear and clean station and clean up once you are done
- Opt for a brush when cleaning waste drill residue to prevent burns and wear gloves too
- Wear protective goggles and face shields to protect your eyes & face
- Double-check the sharpness of the bits and replace/sharpen if necessary
- Do not wear baggy clothes, dangly jewelry, untied long hair, etc. as they might be hazardous
- Clamp or secure the object you are about to drill to ensure that it does not slip or shift during the drilling process
- Ensure that you exert the correct pressure when drilling as too much pressure will be more aggressive on your object
Just because an object is secured by screws, does not mean that poorly fitted screws should get in the way of their beauty. In order to give your metal or wooden creations that perfect finish, the use of countersinks is significant.
And to ensure a flawless look, you need specialized bits, and that is where the countersink bits crafted for metal and wood can make a difference between a good and a great final product.
Hopefully, after going through our extensively researched guide and reviews, you’ll be able to acquire the best countersink bit for metal and wood that will never let you down!