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A sewing machine needle consists of: * shank - clamped by the sewing machine's needle holder * shoulder - where the thick shank tapers down to the shaft * shaft - a length suitable for driving the eye and thread through the material and down to the bobbin * groove - cut in the back of the shaft to release the thread into a loop that aids the hook or shuttle to pick up the thread * scarf - provides extra room for the hook or shuttle to pass close by * eye - carries the thread * point - penetrates the material by either parting the threads or cutting a hole in the fabric ==Construction== The majority of sewing machine needles are made of various grades of hardened chrome-plated steel, though certain specialty needles are coated with titanium rather than chrome. 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「Sewing machine needle」の詳細全文を読む スポンサード リンク
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