TYPES OF DRILL BITS – USE THE RIGHT ONE

Drilling and screwing tools are essentials for do-it-yourself hobbies, construction projects and jobs around the house. As indispensable as a hammer, a drill will allow you to easily and efficiently drill into various materials. Whatever your needs, it’s important to research your options and decide what kind of drill will be best for you. 

  • There is a wide range of drills available.it's so confusing to know which one is best.
  • Why am I unable to drill a hole in the drywall above my windows to install curtain rods?
  • How to drill a brick wall without cracking it ?

If you ever meet those situations before. Read along. Our handy guide will explain everything you need to narrow down what you're looking for in a drill, and help you decide on the best option for you. you'll end up with a drill that is fit for purpose and good value for money.

1、Drill driver, Impact drill or hammer drill: which one do you need?

Drill Drivers: This is the most common type of drill and quite flexible.Those drills not only drill holes into wood and metal, they also act as drivers – this means they can loosen and tighten screws using different drill and screwdriver bits. Drill drivers are Ideal for putting up shelves, hanging pictures and assembling flat pack furniture.

Hammer Drills: A hammer drill has a hammer function, The hammer function gives a knock on the head of the hammer drill, which pulsates rather than it rotates. The force of this knock is very great, It has to be, since a hammer drill has to get through much harder materials. Hammer Drills are a powerful option suitable for drilling hard surfaces like concrete and masonry.
A hammer drill is perfect for those more heavy-duty jobs around the home, from putting up shelves to securing gutters in place. Multiple torque settings allow you to adjust the power while keeping the RPM low, so it can power through hard materials whilst limiting damage to the surface area. Hammer drills do not always have a reverse screwdriving function, but impact drills do.
The hammering force of a hammer drill is expressed in Joules. The more powerful a hammer drill is, the bigger the holes you can make with it and the quicker you can get through concrete.

Impact Drills: An impact drill has an impact function and a hammer drill has a hammer function. The main difference is in the force that's transferred to the drill head. The impact function works in this way: the drill bit doesn't just rotate, it also makes an "impacting" motion. This allows the drill to also get through that stone wall.


Okay, now we know that you use a hammer drill to drill concrete, and not an impact drill. But what about making holes in wood, metal, or tiles and masonry? An impact drill is a better choice than a hammer drill in that case. Naturally, the powerful hammer drill will have no problem getting through the material, but the high RPM means that there's a risk you'll damage the material. An impact drill generally has 2 mechanical speed settings and an adjustable RPM, allowing you to use the perfect settings for your job. Just don't forget to switch off the impact or hammer function if you're drilling wood or metal!

In short

Drill Driver Hammer Drill Impact Drill
Screws Yes No No
Drill in wood Yes Yes Yes
Drill in metal Yes Yes Yes
Drill in plaster and soft stone Yes Yes Yes
Drill in tiles and brick No No Yes
Drilling in concrete No No Yes
Demolition and chiseling No No No


Keeping all the various types of drills stated above in your mind, you should be able to fairly easily pick the right one. This is due to the reason that all the different types of drills stated here have all their details, pros and cons, and even differences. Thanks to this, you should be able to fairly pick the right one for your needs and easily drill holes that you need. If you have gone through all these different types of drills, make sure to share your thoughts in the comments section. You can also post any questions down there if you have any!

 

2、Different types of drill bits

To drill a satisfactory hole in any material, the correct type of drill bit must be used; it must be used correctly and be sharpened as appropriate.
Learning how to sharpen drill bits is cost effective, it is better to keep a bit sharp by occasional sharpening rather than waiting until it becomes really blunt. A sharp bit cuts better with less effort whether used in a power or hand drill. A sharp bit will also give a cleaner hole.

Twist drill bits
The twist drill bit, which was invented by Steven A. Morse of Massachusetts in 1861, is the most frequently used type in the industry today.
It features a cutting point at the tip of a cylindrical shaft with helical grooves. These grooves act as an Archimedean screw and lift swarf out of the hole.
The most common twist drill bit features a point angle of 135 degrees and is ideal for use in wood, metal, plastic etc.

Step drill bits
It is a kind of bit, whose tip is grounded down to a different diameter. The instability between the original diameter and this ground diameter is either angled, forming a countersink or straight, forming a counterbore.
The best part of this kind of bit is that both the diameter can have same groove characteristics, which prevents the bit from clogging.

Masonry Drill Bit
A masonry bit drills into tough materials such as concrete, brick and other masonry. Some work with a standard corded or cordless rotary drill, but those designed for use with a rotary hammer or hammer drill can help the concrete drill bit bore into masonry more effectively. The hammering action of the tool drives the carbide tip into the material while the rotating action channels away debris along the flutes.
Thanks to their blunt tip and extremely hard material, they effortlessly punch holes in concrete. Concrete drill bits logically always have an SDS-plus or SDS-max shank, so they'll fit on the hammer drill. If you need to sharpen the masonry bits, use a drill sharpener or sometimes a grindstone.

Now you know when drilling concrete, use a hammer drill and concrete drill bit (Those drill bits bear that name for a reason, after all). If you're using an impact drill in softer materials than concrete, make sure to use suitable drill bits for that as well. The different types of drill bits are designed to optimally drill in their respective drill bits. Use a wood drill bit for wooden materials, a metal drill bit for metal, and a stone drill bit for... well, you get it!

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3、Tips & Tricks

  • Drill voltages between 6-8 V are for use mainly as screwdrivers. 9-11 V are more suited to drilling and are perfect for occasional work around the home. For serious DIYers and professionals, the preferred sizes are 12 V for light-duty work and 18V for heavy-duty work.
  • Put your workpiece on a surface, such as a scrap of plywood, that you can drill into without damaging the bits. If you drill all of the way through the workpiece and into the scrap wood, the back of the work piece is less likely to splinter.
  • Use an awl to mark a starting point where you want to drive a screw or drill a hole on the workpiece. This gives the screw or bit a place to start without slipping.
  • When you need to drill holes that are a specific depth, you can easily create a depth flag by wrapping your bit with painters tape at the desired depth point on the bit. When the flag meets the workpiece, you're at the desired depth.
  • To keep your bits from wandering or breaking, always hold your drill perpendicular to your work surface, keeping everything straight. If you're a beginner, hold a square next to the drill so you see and feel the correct alignment. Then apply even, steady pressure. Start drilling slowly and increase the speed. Let the drill do the work.
  • For every 1/4 inch of drilling depth, back the bit out slightly from the wood to clear the debris. The holes will drill faster, and the bit will stay cooler and last longer.
  • Drilling a pilot hole before driving a fastener helps prevent the wood from splitting. To drill a pilot hole for screws, use a bit that matches the diameter of the inner diameter of the threaded portion (not the diameter of the threads) of the screw. For nails, use a bit with a slightly smaller diameter than the nail. Drill to a depth that matches the length of the fastener — stopping short leads to split wood and stripped screws. Use a countersink bit to drill the proper-size holes. The countersink cuts a depression that allows the head of a fastener to be flush with the surface of the workpiece. Most countersink bits will come marked with the size of screws they're designed for. See How to Drill a Pilot Hole for more instructions.
  • When driving a screw into hardwoods — oak or maple, for example — apply a bit of paste finishing wax or soap to the threads to lubricate the screw and reduce friction. This makes driving the screw easier.

4、Practice: the use of Hammer Drills

(1) Install bathroom hardware
Drill holes in the wall to install a mirror


Drill holes in the tiles to install the shelf

(2)Install a Room Divider Bracket
Whether you have to make the most of a small space or break up a big one, using a room divider is both a practical and statement piece.

(3)drill holes in the kitchen plate

(4)Install the TV stand

5、Conclusion

To wrap it up—Choosing the right drilling tool can be complicated if you have never used drills before. However, with all the info that we mentioned, choosing the right tool becomes much simpler. You will surely need a drilling tool at some point, so make sure to get the right one, and don’t forget about the importance of the right bits.


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