Used extensively in bookbinding, a board shear is a big, hand-operated machine for slicing board or paper. Like scissors, a board shear makes use of two blades to use shear stress exceeding the paper's shear energy so as to cut. The stationary blade kinds the edge of the chopping desk, Wood Ranger Power Shears website with the moving blade mounted on a slicing arm. Originally generally known as a table gauge shear as a result of its gauge allowed the slicing of constantly-sized materials, the board shear resembles a bigger model of the paper cutters generally present in places of work. The earliest recognized reference to a board shear comes from an 1842 complement to Penny Magazine, titled A Day at a Bookbinder's, which included a drawing of a board shear with many of the major developments already present. Middleton, Bernard (1996). A History of English Craft Bookbinding Technique. Oak Knoll Press & The British Library. Harrison, Gary. "Board Shear". This article about making artwork out of books, the arts associated to bookbinding, or Wood Ranger Power Shears website the design of mass-produced books is a stub. You can help Wikipedia by increasing it.

Viscosity is a measure of a fluid's rate-dependent resistance to a change in shape or brushless motor shears to motion of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of thickness