 Re: Hand tools .... A to Z.......... | |
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[/SIZE][/B][/U][URL="http://en.wikipedia.org/wiki/Hand_tool"]hand tool[/URL] that delivers a strong, sudden [URL="http://en.wikipedia.org/wiki/Torque"]torque[/URL] after being struck by a [URL="http://en.wikipedia.org/wiki/Hammer"]hammer[/URL]. In conjunction with toughened [URL="http://en.wikipedia.org/wiki/Socket_wrench"]socket sets[/URL], they are often used by [URL="http://en.wikipedia.org/wiki/Mechanic"]mechanics[/URL] to loosen larger [URL="http://en.wikipedia.org/wiki/Screw#Bolt"]bolts[/URL] and [URL="http://en.wikipedia.org/wiki/Nut_%28hardware%29"]nuts[/URL] that are frozen or over-torqued in place. [URL="http://en.wikipedia.org/wiki/Image:ImpactDriverWithBits.png"]
[/URL] [URL="http://en.wikipedia.org/wiki/Image:ImpactDriverWithBits.png"][IMG]http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png[/IMG][/URL]
Impact drivers consist of a heavy outer sleeve that surrounds an inner core that is [URL="http://en.wikipedia.org/wiki/Spline_%28device%29"]splined[/URL] to it. When the user strikes the outer sleeve, its downward force works on the spline to turn the core about 90 degrees and any socket or work bit attached to it. The tool translates the heavy [URL="http://en.wikipedia.org/wiki/Moment_of_inertia"]rotational inertia[/URL] of the sleeve to the lighter core to generate large amounts of torque.
If the tool is powered by a motor instead of by manual striking, it is called an [URL="http://en.wikipedia.org/wiki/Impact_wrench"]impact wrench[/URL] instead, and greatly increases the versatility of this type of tool.
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