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Continuously variable transmission
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=== Other uses === Some [[Drill|drill presses]] and [[Milling (machining)|milling machines]] contain a simple belt-drive CVT system to control the speed of the spindle, including the Jet models J-A5816 and J-A5818.<ref>{{cite web |title=Operating Instructions and Parts Manual 15-inch Variable Speed Drill Press Models: J-A3816, J-A5816, J- A5818 |url=https://content.jettools.com/assets/manuals/354500_man_EN.pdf |website=jettools.com |language=en-US}}</ref> In this system, the effective diameter of only the output shaft pulleys is continuously variable. The input pulley connected to the motor is usually fixed in diameter (or sometimes with discrete steps to allow a selection of speed ranges). The operator adjusts the speed of the drill by using a hand wheel that controls the width of the gap between the pulley halves. A [[tensioner]] pulley is implemented in the belt transmission to take up or release the slack in the belt as the speed is altered. [[Winch]]es and [[Hoist (device)|hoists]] are also an application of CVTs, especially for those adapting the transmission ratio to the resistant torque. [[Bicycle]]s with CVT gearing have had limited commercial success, with one example providing a range of gearing equivalent to an eight-speed shifter.<ref>{{cite magazine |title=Here's Proof That Commuter Bikes Don't Have to Suck |url=https://www.wired.com/story/priority-continuum-onyx-city-bike/ |magazine=Wired |access-date=8 July 2020}}</ref> The bicycle's short gearing assisted when cycling uphill, but the CVT was noted to significantly increase the weight of the bicycle.<ref>{{cite web |title=How A Bike With Infinite Gears Changed The Way I Commute |url=https://www.gizmodo.com.au/2017/02/how-a-bike-with-infinite-gears-changed-the-way-i-commute/ |website=gizmodo.com.au |access-date=12 July 2020 |language=en-AU |date=5 February 2017}}</ref> The rise of the [[electric bicycle]] has brought a reappraisal of the CVT as a better solution for an optimal drive train set up in comparison to gearing systems historically applied on human powered bicycles.<ref name="Chiara Contò">{{cite journal |last1=Contò and Bianchi |first1=Chiara and Nicola |title=E-Bike Motor Drive: A Review of Configurations and Capabilities |journal=Energies |date=23 December 2022 |volume=16 |issue=1 |page=160 |doi=10.3390/en16010160 |doi-access=free |hdl=11577/3521993 |hdl-access=free }}</ref><ref name="Richard Peace">{{cite web |last1=Peace |first1=Richard |title=Guide To E-Bike Gearing Systems |url=https://electricbikereport.com/electric-bike-gear-systems-explained/ |website=Electric Bike Report |date=15 July 2022 |access-date=12 April 2024}}</ref> The handsfree and continuously stepless operation combined with low maintenance make the CVT an appealing solution for the use on city eBikes and by [[commuting|commuters]].<ref name="Piancastelli">{{cite journal |last1=Piancastelli, Frizziero and Donnici |title=Study and optimzation of an innovative CVT concept for bikes |journal=ARPN Journal of Engineering and Applied Sciences |date=August 2014 |volume=9 |issue=8 |pages=1289–1296 |url=https://www.researchgate.net/publication/290840714 |access-date=12 April 2024 |publisher=Asian Research Publishing Network (ARPN). |issn=1819-6608}}</ref>
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