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A typical helping hand A helping hand , also known as a third hand, soldering hand, or X-tra Hands , is a type of extremely adjustable jig used in soldering and craftwork to hold materials near each other so that the user can work on them.
Third hand may refer to: Helping hand (tool), also known as a third hand, a type of jig used in soldering and craftwork; Autoblock, also known as a third hand, a rope device used in climbing and caving; The Third Hand, a 2007 album by RJD2; The Third Hand, a 1981 Hong Kong adult film
An example of a jig is when a key is duplicated; the original is used as a jig so the new key can have the same path as the old one. Since the advent of automation and computer numerical controlled (CNC) machines, jigs are often not required because the tool path is digitally programmed and stored in memory. Jigs may be made for reforming plastics.
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To help with this alignment task, several kinds of jigs and fixtures can be used to provide the correct geometry (i.e., accurate coaxiality with the hole) without having to use freehand skill to approximate it: Hand-tapper: A simple fixture analogous to an arbor press in its basic shape. Its spindle is thus held accurately perpendicular to the ...
Modern pocket hole machines are capable of routing low-angle pockets - as low as 3 degrees - creating more flush, stronger joints by minimizing the joint shift or “creep” that occurs when creating pockets and joints by using a pocket hole jig or by hand. [1]
An autoblock (or autobloc or "third hand") is a rope device used in climbing and caving for both rappelling (downward) and ascending (upward). [1] [2]While rappelling, it slides freely down the rope when pushed downward by the hand, allowing a controlled descent, but jams in the event of a sudden drop or loss of control, stopping the descent.
Lapping is a machining process in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine. Lapping often follows other subtractive processes with more aggressive material removal as a first step, such as milling and/or grinding. Lapping can take two forms.
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