page_title: Lego Technic
section_title: Motors
hierarchical_section_title: Lego Technic / Lego Technic Components / Motors
caption_attribution_description: English: Lego 42065 - RC Tracked Racer and RC Off-Road Truck.
context_page_description: Lego Technic is a line of Lego interconnecting plastic rods and parts. The purpose of this series is to create more advanced models with more complex technical functions, compared to the simpler brick-building properties of normal Lego.
  The concept was introduced as the Expert Builder series and originally Technical Sets in 1977, and was renamed Technic in 1982.
  Technic sets are often characterised by the presence of special pieces, such as gears, axles, and pins. Other special pieces include beams and plates with holes in them, through which the axles could be installed. Some sets also come with pneumatic pieces or electric motors. In recent years, Technic pieces have begun filtering down into other Lego sets as well, including the BIONICLE sets, as well as a great many others.
  The style of Lego Technic sets has been changing over time. Technic sets produced since the year 2000 use a different construction method, described as "studless construction". This method utilises beams and pins rather than Technic bricks.
  Mindstorms, a Lego line of robotic products, also uses many Technic pieces, although it is sold as a separate line of products.
context_section_description: The Lego Technic system has always included a variety of different electric motors. 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 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. While these were released in kits with Technic parts they were not sold as Technic motors.
  The first dedicated Technic motor was a 4.5 volt rounded brick (p/n 6216m) released in 1977 as part of the Expert Builder Power Pack (960-1) and Supplementary Set (870-1), this output via a small protruding axle that would rotate when the motor was powered. The motor was not geared, resulting in high-RPM, low-torque output. Gearboxes and a square casing were available. A 12 volt motor of the same physical dimensions as the 4.5 volt motor was also available in set 880-1. The 12 volt version is visually distinguishable by being black, rather than grey.  The 4.5V and 12V motors were also compatible with the battery boxes and mains transformers used within the Trains series of the 1980s
  The 4.5 volt motor was replaced by a similar but square 9 volt motor in 1990, as part of the new generation "Electric System" which dispensed with the pinned plugs and replaced them with regular bricks that incorporated contacts within the stud interfaces.  This system gave more reliable contacts over time, as the pinned plugs had a tendency to go slack over time, or for the wires to fracture or come detached.
  Recent motors contain an axle hole enabling axles of different lengths to be used.
caption: The RC Tracked Racer and the RC Off-Road Truck, two models built from one same box
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