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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.
New KiHa 261-1000 series 5-car sets were introduced on Super Tokachi services between Sapporo and Obihiro from October 2007. [1] KiHa 261-1000 series set ST1101 in revised colour scheme in May 2021. A further 28 KiHa 261 series vehicles were delivered from 2015 onward, and these are not equipped with tilting capability. [4]
Pass-through sockets and ratchets are built for 1 ⁄ 4-inch, 3 ⁄ 8-inch and 1 ⁄ 2-inch sets in both SAE and metric sizes. By using a fine tooth ratchet and socket system that allow a pass-through ratchet to be used as a conventional ratchet handle with interchangeable 1 ⁄ 4-inch and 3 ⁄ 8-inch drives some ratchets can be used with ...
A variety of impact wrenches, in all common sizes from 1 ⁄ 4 to 1 in (6.4 to 25.4 mm), of different styles, including inline, butterfly, and pistol grip. This "reactionless" ratchet uses a miniature pin clutch impact mechanism instead of a gear reduction. Large 2 + 1 ⁄ 2 in (64 mm) Drive Ingersoll Rand impact vs 1 ⁄ 2 in (13 mm) impact ...
1823: Aza Arnold develops a differential drive train for use in cotton-spinning. The design quickly spreads across the United States and into the United Kingdom. [3] 1827: Modern automotive differential patented by watchmaker Onésiphore Pecqueur (1792–1852) of the Conservatoire National des Arts et Métiers in France for use on a steam wagon ...
One-way bearing combining sprags and bearing rollers in one race Sprags jam when driven and slide when in reverse. A sprag clutch is a one-way freewheel clutch.It resembles a roller bearing but, instead of cylindrical rollers, non-revolving asymmetric figure-eight shaped sprags, or other elements allowing single direction rotation, are used.