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Pocket-hole joinery, or pocket-screw joinery, involves drilling a hole at an angle — usually 15 degrees — into one workpiece, and then joining it to a second workpiece with a self-tapping screw. The technique, in addition to doweling, has its roots in ancient Egypt. Egyptians clamped two workpieces together and bored a hole at an angle from the outside workpiece into the second workpiece. They then inserted a dowel with glue, and cut it off flush with the outermost surface. ==Benefits== * Because the screws act as internal clamps holding the joint together, glue is unnecessary (but usually recommended) for most common joints. If glue is used, clamping is not required because of the ‘internal clamps’ holding the joint together while the glue dries. * Requires only one hole to be drilled, eliminating the need to precisely line up mating workpieces, as is required with dowel and mortise and tenon joints. * Does not require any complex mathematics or measurements, such as those used in mortise and tenon joints. * Because pocket-hole joinery doesn't require access to the inside of the joint, quick repairs are possible without completely disassembling the joint. Fixing a squeaky chair or strengthening furniture requires only the drilling of additional pocket holes, and the use of screws to pull the two pieces together. 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「Pocket-hole joinery」の詳細全文を読む スポンサード リンク
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