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The roller is an agricultural tool used for flattening land or breaking up large clumps of soil, especially after ploughing or disc harrowing. Typically, rollers are pulled by tractors or, prior to mechanisation, a team of animals such as horses or oxen. As well as for agricultural purposes, rollers are used on cricket pitches and residential ...
Wire race bearings can be large yet lightweight and with small profile and good precision. Wire races have little intrinsic structure and must be adequately supported by the bearing housing. Balls, rollers or even cross rollers are used as rolling elements. Due to the design wire race bearings are commonly called '4-point-contact' bearings. [1]
Caterpillar soil compactor equipped with padfoot drum, being used to compact the ground before placing concrete Antique "Kemna" steamroller. A road roller (sometimes called a roller-compactor, or just roller [1]) is a compactor-type engineering vehicle used to compact soil, gravel, concrete, or asphalt in the construction of roads and foundations. [1]
Steel wire reel in Muurame, Central Finland Cable reels in Muurame, Central Finland RG-59 cable reel Shipping Roll trailer carrying cable reels Retractable cable reel. A cable reel is a round, drum-shaped object such as a spool used to carry various types of electrical wires. [1]
Dynapac is a Swedish multinational engineering company located in Karlskrona.The company was founded in 1934 and today has subsidiaries in seven countries. Dynapac produces pavers, mobile feeders, rollers and planers.
Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.
Roller Reefing Sails, invented in 1789 by Stephen Hooper, use a canvas strip wound around a roller in the place of shutters. The mill does not have to be stopped in order to adjust the sails. Patent Sails, invented in 1819 by William Cubitt, combine the shutters of the Spring Sail with the automatic adjustment of the Roller Reefing Sail. Single ...
While Revere admitted that Britain had superior rollers, the difficulty of purchasing equipment related to copper rolling forced him to produce his own. One of the many insights Revere had gleaned from his son's espionage mission was a rolling mill design with both rollers mechanically coupled and powered by the same source.