The very earliest motors (p/n x469b) were 4.5 volt, and consisted of a modified "Electric Train Motor" (p/n x469) and along with the 4 driven bushes for wheels added an axle hole enabling axles of different lengths to be used. Broadly, these divide into those powered by batteries (held in a connected battery box) or by mains electricity (via a transformer.) Battery-powered is the most common. The Lego Technic system has always included a variety of different electric motors. Volvo Construction Equipment used a Lego model to develop an electric wheel loader. 8-tooth gears are not recommended for this purpose. Tension (resulting from the correct number of chain-link parts used), along with the combination of gearwheel-sizes used, is critical to reliable operation. With the release of the 'Top Gear Rally Car' ( 42109) in 2020, yet another differential was created with a 28 tooth double bevel gear and five 12 tooth gears on the inside so that the differential could be rotated with gears above and next to the differential.Ĭhain links were also introduced as an additional way of connecting gears. In 2008, an updated version of the original differential has been released, optimised for studless construction with a 28 tooth bevel gear on the outside and three 12 tooth gears on the inside. The casing holds three 12 tooth bevel gears inside. It was replaced in 1994 by a newer design incorporating 16-tooth and 24-tooth gears on opposite sides of the casing. They can also be meshed with the newer double bevel gears. The original differential from 1980 had a 28 tooth bevel gear, designed to be meshed with the 14 tooth bevel gears (replaced by the 12 tooth gears) to give 2:1 reduction. In addition to standard gears, some kits include a rack, a clutch and even worm gears and differential gears. There is also a 16 tooth spur clutch gear, a 20 tooth double bevel clutch gear and a 24 tooth friction gear that slips when a certain amount of torque is put on it to prevent motors from damaging any parts or burning themselves out. The double bevel gears are cut so they can also be meshed as spur gears. Gears come in several sizes: 8 tooth, 16 tooth, 24 tooth and 40 tooth spur gears 12 tooth, 20 tooth, 28 tooth and 36 tooth double bevel gears and 12 tooth and 20 tooth single bevel gears. Gears have been included within Lego Technic sets since 1977 as a way of transferring rotary power, and of gearing-up or down the speed. In September 2021, Matthew Ashton, The Lego Group's Vice President of Design announced the Technic alongside City, Friends, Creator, Classic, Speed Champions, Monkie Kid, Ninjago, Collectible Minifigures and DOTS themes will continue until at least 2023. The latest generation of the Mindstorms range, the Robot Inventor (released October 2020), as well as its predecessors the Mindstorms EV3 (released September 2013) and the Mindstorms NXT (released August 2006), are based on the studless construction method. Mindstorms, a Lego line of robotic products, also uses many Technic pieces, although it is sold as a separate line of products. (Studs are the small circular knobs which appear on traditional Lego bricks.) This method utilises beams and pins rather than Technic bricks. Technic sets produced since the year 2000 use a different construction method, described as "studless construction". The style of Lego Technic sets has been changing over time. In recent years, Technic pieces have begun filtering down into other Lego sets as well, including the BIONICLE sets (which were once sold as part of the Technic line), as well as a great many others. Some sets also come with pneumatic pieces or electric motors. Other special pieces include beams and plates with holes in them, through which the axles could be installed. Technic sets are often characterized by the presence of special pieces, such as gears, axles, and pins. The concept was introduced as the Expert Builder series and originally Technical Sets in 1977, and was renamed Technic in 1982. 2.8 Powered Up (Control+, Power Functions v2).2.6 "Studded" (Beams) versus "Studless" (Liftarms).
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