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Buying a Screw Gun

November 9th, 2007 · No Comments

A screw gun is used to either insert and tighten or loosen and remove screws. This is a versatile tool that finds application at home, in workshops, and in big industries as well. It encompasses a head or a tip that comes in contact with the screw. The rotating tip applies torque that inserts, tightens, or loosens the screw. A screw gun finds its place in the tool kit of most workers, including carpenters, drywallers, masons, electricians, ship builders, building contractors, and even domestic technicians. Considering the fact that in the construction of an average house there may be around 50,000 single instances of screw based applications involved, the screwgun is an essential requirement to save time and effort.

Features and Working of a Screwdriver/ Screw Gun

Screwdrivers are available for different types of uses. The tip of these screwdrivers is rotated at very high speeds by a motor. Since, there are various types of screw heads available in the market to provide sufficient torque to each screw, there are various types of screw tips used. The most common types of screw heads include slotted, Phillips, PoziDriv, Robertson, SupaDriv (crosspoint), TORX, and Allen (hex). Most screwdrivers have detachable head called the bits locator. The bits locator enables the user to change several screw tips, keeping the same handle. Electric screwdrivers are powerful tools and they combine batteries, motors, gears, and a switch. In the case of the pneumatic screwdriver, pressurized air is stored in an air tank and this air generates the force required to rotate the nosepiece. The way a screwdriver or a screw gun is designed makes a difference in its price.

Most screwguns are user friendly and can be easily handled. However, those with a two-finger space combined with a rubber trigger provide additional comfort and balance. The in-line D-handle gives better hold and grip on the screwdriver. Powered Screwdrivers are ideal for drywall, assembly, flooring, fencing, general repair, body shop work, roofing, and deck construction uses. Higher the horsepower, more the rotation speed of the head that helps in putting the screws through tougher objects. The body and gears of the screwdriver are made from rugged and stronger materials such as steel, aluminum, thus, making it more durable and light-weighted. Screwdrivers also feature collated screw system and trigger locks. The rotational speed of the tip of the screwdriver varies up to 6000 RPM; whereas, the power of the motor is around 4.3 to 6.8 amp. Certain screwdrivers and screw guns have built-in adjustable depth locator, enabling easy and consistent screw depth setting. The lock-on button is leveled lower and is often centrally located for easier and faster control. The double-insulation prevents the body of the screwdriver from becoming hot due to heavy work and high torque, hence, increasing the life. The snap-action clutch, installed in many screwdriver devices, makes the machine much more silent and quiet. The ergonomics of the screwdriver or the screw gun is designed such that it reduces stress on the hand and on the wrist of the user. The contoured body ensures better grip and comfort while in operation.

What to Look For in a Screw Gun

There are three things that should be considered while purchasing a screwgun: power, performance, and comfort. Depending on the budget, one could opt for the highest power of the motor and the rotation speed of the screwdriver. Also consider the usage in reference to the time, material to be screwed or place it is to be used. The screwdriver should be user-friendly. Additionally, it is better if the screwdriver or the screw gun is comfortable while handling. Other adjustments and controls should be easily accessible and handy. Different features such as cord length, noise that the device makes, material with which the parts (bearing, gear, etc) are made, and the presence of a belt-clip add to the value of the product. Adjustability of the nosepiece and the number and types of nosepieces packaged with the screwdriver play a key role while selecting. There is an array of screw range varying from 1” to 2.1/4”. However, each screw driver is designed to handle certain length of screws. Therefore, while selecting the screwdriver, the user should also consider the length of the screw that he is going to work with or select a screwdriver that can be operated with a wider range. Also the power-to-weight ratio is to be kept in mind while making the choice. An autofed screwdriver is more helpful when same types of screws are to be put in a large amount.

Some reputed manufacturers of screwdrivers and screw guns include Makita, Milwaukee, DeWalt, Senco, and Porter Cable, McCulloch, Mayhew, Grey Pneumatic, Knipex, Eclipse, Old Forge.

Source: Toologics.com

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