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A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools. The word ratchet is also used informally to refer to a ratcheting socket wrench.
Socket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt.
A standard one-inch micrometer has readout divisions of 0.001 inch and a rated accuracy of ±0.0001 inch [14] ("one tenth", in machinist parlance). Both the measuring instrument and the object being measured should be at room temperature for an accurate measurement; dirt, operator skill issue, and misuse (or abuse) of the instrument are the ...
Spiral ratchet screw drivers, often colloquially called Yankee screwdrivers (a brand name), provide a special mechanism that transforms linear motion into rotational motion. Originally the " Yankee " name was used on all tools sold by the North Brothers Manufacturing Company but later, after Stanley purchased the company, it became synonymous ...
A click torque wrench. A torque wrench is a tool used to apply a specific torque to a fastener such as a nut, bolt, or lag screw.It is usually in the form of a socket wrench with an indicating scale, or an internal mechanism which will indicate (as by 'clicking', a specific movement of the tool handle in relation to the tool head) when a specified (adjustable) torque value has been reached ...
A button may be present on the top or side of the pencil, to allow the user to advance the lead manually when necessary. Another variation advances the lead automatically. In this design, the lead is advanced by a ratchet but only prevented from going back into the pencil, just held from falling by a small amount of friction. The nib is a ...
Dresher and her makeup artist aren’t the only ones who love these lip products from Laura Geller — the cream lipstick has legions of fans, including many older adults.
Ratchet (device), a mechanical device that allows movement in only one direction; Ratchet, metonymic name for a socket wrench incorporating a ratcheting device; Ratchet (instrument), a musical instrument and a warning device