The shaft or framework of a brace drill, especially the part that holds and rotates the cutting bit.
From bit (the cutting tool) + stock (a handle or shaft, from Old English stoccu). This term describes the mechanical component of traditional hand drills and braces used in carpentry and metalworking.
A bitstock was the engineer's answer before power tools—the clever mechanical design let workers apply rotational force without electricity. Museums often display these elegant wooden and iron tools as examples of pre-industrial ingenuity.
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