Impact Drill
Info Source On The Full Range Of Impact Drills


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Impact Drill

Drill through the toughest materials with ease using the powerful new impact drills.  

The impact drill has recently witnessed an explosion of popularity as more models have become available from the top manufacturers. Every year, new technologies enter the market bringing smaller, more compact designs that pack more power and have better features.  Many people are surprised when they use these tools for the first time which often become their favorites, leaving them wondering how they ever got along without them.

Impact drills look a lot like regular power drills or drivers and that is for a good reason—they can do most of what a regular drill or driver can do but stand apart because of what they can do that other tools cannot. In drilling-only mode, they can drill a hole just as well or better than any other drill but if the going gets tough and your bit gets stuck or you just aren't making headway, all you need to do is flip a switch to select impact drilling mode and your drill will now blast through most obstacles with ease. Unlike the direct drive mechanism in a regular drill or driver that produces in-line torque, the impact mode produces a rapid centrifugal or rotary hammering action that will do the work for you with about twice or thrice the torque of regular drills.  This also makes it easier to work on screws or bolts while either removing them from or screwing them into difficult materials like thick hardwoods, metals and masonry because it takes away the need to exert pressure manually.

There is a lot of confusion about what exactly an impact drill is and part of the reason is the profusion of terms and nomenclature that the different manufacturers use. Hitachi specifically calls them impact drills. Maybe this is for marketing reasons but it does not help the consumer. Basically, the tool works both as a driver and a drill with the addition of a the impact function that is delivered at the flick of a switch. They are not to be confused with hammer drills although both have some common functions. The basic difference is that hammer drills give you more power and impact drills and impact drivers give you more torque. With both tools, you will use different bits for different uses that range from drilling through masonry to driving a large bolt though a heavy stud. You will also need to take different precautions depending on how you use them. For example, when drilling masonry, it is necessary to keep pulling the drill bit out of the hole to clear the debris or the tip will overheat and may break.  On a smooth surface like tile or marble, it helps to apply a strong tape over the drill point in order to prevent slipping. 

Interestingly, a lot of people now use impact drills in place of the regular screwdriver and the reason of course is because they save their wrists, arms and shoulders a lot of pain and trouble while accomplishing what a screwdriver does with absolute ease. In tight spaces where it is not possible to strain and apply a lot of body force on the tool, the impact drill is irreplacable.

The downside is that they are extremely loud and can quickly get on your nerves, specially in closed work spaces and the cordless models draw down power a lot quicker.

Most of the heavy duty drills are corded and you need to plug them in to operate on different voltages. However, the fastest growing category in the power tools industry are cordless impact drills and no wonder. These tools can be noticably smaller than other cordless tools but produce more power and torque for the same tasks.  They are ideal in compact spaces that require one to drill through various materials including masonry.

A couple of representative impact drills are:

Dewalt D21721K 240V Impact Drill 650W
Dewalt professional single speed impact drill with the following features:. Two speed percussion drill with variable speed control and reverse, with a dust sealed switch for added durability. Specifications. Keyless chuck capacity 13mm. Power input 650 watt. Power output 325 watt. Maximum torque 30/12 nm. No load speed 0-1100 / 0-2600 rpm. Max drilling capacity (wood) 25mm. (steel) 13mm. (concrete) 16mm. Spindle thread 1/2 x 20 unf. Standard equipment. Side handle. Depth stop. Carrying case. 240 volt.

Hitachi - Koki FDV20VB 20mm(3/4") Impact Drill
Powerful 750W motor(*710W for 240V model)
Easy-select button for quick selection of Impact drilling or drilling only modes
Two(2)-speed gear shift for easy high/low speed change
Variable speed and reversing switch
Motor Housing renewed with clamshell type design

Impact Drill vs Driver Drill