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Shearing, also known as die cutting, [1] is a process that cuts stock without the formation of chips or the use of burning or melting. Strictly speaking, if the cutting blades are straight the process is called shearing; if the cutting blades are curved then they are shearing-type operations. [2]
Thus, it entered the shear-manufacturing business. [14] Views of the shop floor, 1946. The company was unable to obtain castings for the shears due to the fact that all the foundries were backlogged with orders, just as the machine tool manufacturers were. So, the Parker Shears were built entirely out of steel plate – no castings at all.
This is a list of notable types of weapons which saw use in warfare, and more broadly in combat, prior to the advent of the early modern period, i.e., approximately prior to the start of the 16th century.
Blade shears are similar to scissors, and although most have the hinge at the back of the shears rather than the center, some still have the hinge in the center, e.g. Jakoti shears. More recent design improvements using a acetal bearing system fitted with superior wear resistant tool steel blades has greatly increased the longevity of the shears.
A 5-degree shear angle decreases the force by about 20% [citation needed]. The amount of energy used is still the same. The moving blade may also be inclined 0.5 to 2.5°, called the rake angle, to keep the material from becoming wedged between the blades. However, raking the blade compromises the squareness of the edge. [4] The machine ...
An alligator shear, historically known as a lever shear [1] and sometimes as a crocodile shear, [2] is a metal-cutting shear with a hinged jaw, powered by a flywheel or hydraulic cylinder. Alligator shears are generally set up as stand-alone shears; however, there are types for excavators. The jaw size can range from 4 to 36 in (100 to 910 mm ...
A war scythe or military scythe is a form of polearm with a curving single-edged blade with the cutting edge on the concave side of the blade. Its blade bears a superficial resemblance to that of an agricultural scythe from which it is likely to have evolved, but the war scythe is otherwise unrelated to agricultural tools and is a purpose-built ...
Blade shears, typically used for shearing animals; Grass shears, for lawn trimming; Kitchen shears, scissors used in the kitchen for food preparation; Pinking shears, scissors the blades of which are sawtoothed instead of straight; they leave a zigzag pattern instead of a straight edge; Pruning shears, for cutting branches and stems; Snips, for ...