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It is a stepless, fully-automatic transmission, consisting of a V-shaped drive-belt, and two pulleys, each of two cones, whose effective diameter can be changed so that the "V" belt runs nearer the spindle or nearer the rim, depending on the separation of the cones. These are synchronized so that the belt always remains at the same optimal tension.
A cone CVT varies the drive ratio by moving a wheel or belt along the axis of one or more conical rollers. The simplest type of cone CVT, the single-cone version, uses a wheel that moves along the slope of the cone, creating variation between the narrow and wide diameters of the cone. Some cone CVT designs use two rollers.
Pushing one lever more than the other causes the mower to make a gentle turn. Pushing one lever forward and pulling the other back pivots the mower about its center by driving its wheels in opposite directions, creating a zero-radius turn. [6] Zero-turn mowers can use steering wheels but must be designed much differently.
An automotive belt with the number "740K6" or "6K740" indicates a belt 74 inches (190 cm) in length, 6 ribs wide, with a rib pitch of 9 ⁄ 64 of an inch (3.6 mm) (a standard thickness for a K series automotive belt would be 4.5mm). A metric equivalent would be usually indicated by "6PK1880" whereby 6 refers to the number of ribs, PK refers to ...
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A pulley is a wheel on an axle or shaft enabling a taut cable or belt passing over the wheel to move and change direction, or transfer power between itself and a shaft. A sheave or pulley wheel is a pulley using an axle supported by a frame or shell (block) to guide a cable or exert force.
In 1945 the first "Record" two-wheel power mower came off the line. In 1950 The Bucher KT 10 'walking' tractor for tillage and other farm related work went into production. In 2003 Bucher sold the two-wheel tractor division. Over this period a total of 116,000 two-wheel motor-driven machines had been delivered. [35]
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