Many a time when you are stuck during drilling a hole, you need a specific bit to get the job done. Let's understand the types of drill bits designed for specific purposes.

Adjustable bit: comes with an adjustable cutter to bore holes of varying sizes. Used for drilling holes for piping or wiring where a rough cut is acceptable.

Around-the-corner bit: to cut curved holes in tight corners with an angled cutting surface.

Auger Bits: designed to drill holes in wooden material. The drilling end has a ***** head so that the bit can self feed.

Brad-point drills: similar to standard bits but have a sharpened point that makes it easier to start in wood. Drills cleaner holes than a spade bit.

Counterbore: a drill bit which permits a ***** to be driven beneath the woods surface. The hole can then be filled with a plug.

Countersink bit: has an angled tip that's designed to form a depression for ***** heads.

Drill Saw bit: Used to cut holes in metal and wood. Can enlarge existing holes.

Expansion bit: another term for adjustable bit. An expansion bit uses an adjustable cutter to bore holes of varying sizes.

Fly Cutter: used on a drill press to cut circles. The diameter of the circles can be adjusted by changing the cutter setting.

Forstner Bit: used to a create a flat bottomed hole in wood, a mortise can be formed by cutting overlapping holes. Also used to a create a segment of a hole at the edge of a board. Use only in a drill press.

Glass bit: has a carbide tip for drilling through glass.

Hole saws: cuts holes from 1" to 6" in diameter, have a center bit for guiding the cutting edge of the saw.

Masonry bits: have carbide tips for drilling holes in masonry, use at speeds below 400rpm.

MultiSpur bit: drills holes large enough to run pipe or conduit through. A threaded ***** in the center of the cutting circle pulls the work towards the cutting edge.

Nail Spinner: used to start finishing nails, prevents wood from splintering as it is driven in. A hammer is used to finish the job.

Reamer Bit: a tapered bit that can be used to fit into an existing hole either to enlarge it.

Rotary Files: used for the same purpose as a conventional file, great for expanding holes in metal and cleaning up rough edges.



Paint Mixers: consist of a shaft with fan type blades. Put the shaft into the paint before rotating to avoid splatter.

Plastic Bit: has a tip that prevents splintering when drilling in plastic. Drill slowly and reduce pressure as you reach the other side of you work.

Plug Cutter: can be used to cut out cylindrical shapes from wood. These small cylindrical plugs are used to cover ***** heads. This bit should only be used in drill press.

Screw driving bits: used for driving screws.

Screw Pilot bit: used to drill a pilot hole, body hole and countersink all at the same time.

Spade bit: has a sharpened point and used for drilling large diameter holes in wood. These bits work best at fast drilling speeds, but remember to start slowly.

Step Bit: a tapered bit with up to 13 diameters as the bit penetrates the work it drills a hole with an increasingly large diameter.

Twist drills: standard drill bits, used for drilling small diameter holes in wood and metal.

Wire Brushes: used to clean up metal, remove rust. Available as either a cup or a wheel with wire brush on the rim.

Woodscrew bit: available in a variety of sizes to match particular ***** sizes. Woodscrews are used to drill a pilot hole, body hole and countersink all at the same time.



By: David Kowalczyk

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Drill bits are an integral part of any drill machine which is used to bore cylindrical holes in different materials like metal, wood, plastics, etc. The choice of a drill bit depends on your requirement. If you are looking at a few quick handy tools a set of steel twisted bits and a few masonry bits would be sufficient but if you are working on the floor then you would require bits which are larger and or designed for a specific purpose/material.

There are many types of drill bits designed for a specific purpose. For example the steel twist bits. The twist bits are useful while drilling metal sheets and can be used for wood, plastic and similar material. Most of the twist steel bits are made up of either High Speed Steel or Carbon Steel.

Both drill bits serve a different purpose like the carbon steel drill bit is used for drilling wood and not metal. The steel twisted bits are also available coated with Titanium Nitride (TiN). These drill bits display a typical gold like color. This coating gives the drill bit more hardness and also a self lubricating property.

This bit should only be used for drilling metal and not any other material. Special care should be taken when using the smallest sizes since these bits are thin and brittle. Always hold the drill square to the work and apply only light pressure when drilling.

Sharpening the blades or drilling areas regularly keeps the bits in shape and hence is cost effective. You can use a drill sharpener, a grindstone jig or an oilstone to do this job. Moreover sharpening the twist drill bits the Titanium Nitride coating can be destroyed. By forming a correct angle at the tip while drilling you can extend the life of the of your drill bit.

There are many types of drill bits for different purposes. Some of them we can enlist here to give you a broad idea. The types of drill bits are:

Metal Drills

1. Twist drill

2. Gun drill

3. Center drill

4. Core drill

5. Left-hand bit

6. Countersink bit

7. Indexable drill

8. Spade Drill

9. Trepan

10. Ejector Drill

Wood Drills

-Lip and spur drill

-Spade bit

-Forstner bit

-Step bit

-Brace drill bit

-Auger bit

-Gimlet bit

-Hinge sinker bit

-Adjustable Wood Bit

Other Materials

-Diamond core bit

-Masonry drill

-Hole saw

-PCB through-hole drill

-Installer bit

Large bits

-Oil and Gas well drilling bits

Ensure that you do some research to understand the specifications in a better way. Reading reviews on different bits is also beneficial as it helps you to find out more about them. Such reviews provide you with complete insight on various products available on the block and also detail you with the pros and cons of them. You can very well find such reviews online wherein customers also share their experience of the same.



By: David Kowalczyk

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Before you purchase your cordless drill, you must have considered the power of the tool. Power comes from the battery that goes with it. You will find a lot of batteries with a range of 2.4 to 36 volts but 9.6 volts to 14.4 volt range are recommended for a cordless drill.

Another consideration is the price. Some cordless drills range from $40 to $1000 or more. The higher the voltage the higher the price it tends to be. However, keep in mind that quality comes with each price tag. The size of the cordless drills has a big impact. Size does not determine the level of performance. Higher voltage cordless drills can generate power and will make your work efficient.

Batteries are the source of energy for cordless drills to function. NiCad battery cells can deliver power steadily, which charging rate is fast. NiCad battery cells got its name from the combination of nickel and cadmium, which are components of this battery. NiCad batteries can be recharged up to a thousand of time before they drain down and render unusable. Remember to follow safety instruction when disposing this kind of battery.

NiCad batteries contain poisonous toxic metals, when mishandled can be a health and environment hazard. You shouldn't just throw them away. Instead, bring them to a battery recycling center. This is the safest way to handle this type of battery.

You can also use nickel metal hydride type of battery or what we call NiMH batteries. This type of battery does not contain cadmium and nickel, which makes this type of battery to be less harmful to the environment. But it is more expensive that the NiCad batteries. This type of battery have a fewer recharges, too.

The recharging cycle is only 50 percent lower than the average. It is best that you check the batteries of your cordless drills to determine if there is a need to buy for an uninterrupted work. You do not want to be bothered by working on your wood works when a battery run half low and a back-up battery is not around. You must also consider the type of drill or driver your cordless drills have.

You can choose your drill from a wide array of options in the market. This will make you cordless drills to work more efficiently and will be able to drill pilot holes and drive fasteners faster.

The variable speed of the cordless drills is another most important feature that you should consider. When you deal with a hard material you need to use a slower speed to drill while soft materials need faster rotation. An adjustable clutch is a lot helpful when you want to adjust speed of your cordless drills according to the material you are working on.



By: David Kowalczyk

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