Written on September 13, 2011 at 1:45 am by Power Tool Team

Speed Drill

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Speed Drill
We have found the best prices for you! See below for more!

DeWALT 20V MAX Li Ion Compact Drill Driver Kit 15 Ah
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US $199.99

1 9 32 TAPER LENGHT DRILL PRECISION TWIST 51118
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US $40.00

Makita 6222D 96V DC NiCd 3 8 Cordless Drill Driver
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US $30.00

Things should be considered when choosing a cordless drill

Why Cordless? Charge it up and take it anywhere. Cordless drills are a standard item in the tool collection of both the average weekend warrior or professional tradesman, alike. With a cordless drill, you can work anywhere. Cordless is easier to use in confined spaces and especially useful in the garden if you have no access to a powerpoint. Working outside in the rain, it's way more preferable to having a mains voltage extension cord under your feet.

Most cordless drills nowadays feature a 'keyless chuck'. This allows an easy change of drill bits with no tools required. However, Cordless drills are available in a myriad of sizes and configurations and it is common to find stores stocking 50 + different cordless drills, alone. How to choose one? Keep the things below in your mind.

1. Speed. Drill Speed is measured in rotations per minute (rpm). With a variable speed cordless drill you also have a powerful cordless screwdriver in your toolset. Start driving slowly and then speed up once the screw 'bites'. Switch into reverse to loosen stubborn woodscrews - much easier on the arm than a normal screwdriver.

2. Voltage. The higher the voltage the more power you have at your disposal. A high voltage drill will also require a larger battery that in turn will make the drill larger and heavier. If you intend to do mostly masonry drilling then buy the highest powered drill that you can sensibly afford. Cordless drill voltages commonly range between 12-24 volts. Typically, a 12v or 14.4v drill will be fine for occasional use while an 18v or 24v drill would be better for a professional tradesman.

3. Battery Type. Traditionally, cordless drills have been powered by nickel-cadmium (NICAD) batteries. The main problem with NICAD power tool batteries was the inevitable development of "memory effect". The battery packs develop the tendency to accept only a partial charge as full and you are left with a battery that has greatly diminished run-time.

Newer lithium-ion (Li-Ion) batteries are starting to be available in more and more cordless drills. Just like the Makita 1834 battery, this Li-Ion batteries offer some distinct advantages over NICAD Makita batteries including no memory effect, longer run times, longer service life, and higher power output. In addition, lithium-ion cells contribute less weight than an equivalent NICAD cell.

4.Hammer Action. Hammer drills, a.k.a. hammer drills are the "Big Daddy" of cordless drills and some models even equal the size and power of their corded counterparts. These drills are primarily used to bore holes in concrete or light masonry work. They are commonly used in home construction when wood studs need to be fastened to concrete. With a hammer action drill, the chuck moves backwards and forwards as it spins - hammering as it drills. This makes drilling into brickwork and masonry easier.

5. Charge Times. Battery charge times vary from model to model. Some drill/charger combinations feature 'fast charge' settings. If your drill is intended for sustained use, get a spare battery. Keep one on charge while using the other.

About the Author

what is the purpose of the external jumper wire on a variable-speed reversing drill switch?

To short the brushes together when the switch is released

To short the field windings together when the switch is released

To form one-half of a cross-connection system

To carry the ground across the sqitch to the motor

Your supposed to put your tongue on it while its running. It makes it drill faster.

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