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A screw gun is similar to a power drill, but designed specifically for driving screws. There are two basic types. One is designed for drywall installation; the other for general construction purposes. A drywall screw gun turns faster, as high as 4,000 RPM, while a screw gun designed for larger screws and other fasteners, also known as drivers, turns around 2,500 RPM. These drivers generally have a high-current motor as well, giving them more power for working with larger fasteners. Using a drywall gun to drive a 4-inch screw into framing materials would be over working the tool, but is no problem for an impact driver.〔Pro Remodeling Tips.com〕 A screw gun looks like a drill, but has a "nose" instead of a chuck. The nose holds an interchangeable shank bit, commonly known as a tip. The most common type of tip is a #2 phillips. The nose on either type of screw gun can be adjusted to countersink screws to desired depth. The user must apply pressure to the bit to engage the clutch and drive the screws. Some screw gun users keep the motor running constantly, while installing drywall, and manufacturers recommend this. Some screw guns automatically feed screws from a clip. A decking screw gun has a long handle so the user does not have to bend over. ==See also== * Nail gun 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Screw gun」の詳細全文を読む スポンサード リンク
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