Page 26 - The Unofficial Guide to Lego Mindstorms Robots

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Figure 2-1.
Hank, a friendly robot

Beams, plates, and shafts are characterized by their length. For beam s, at least, this corresponds to how many studs (bumps)
are on the beam. Figure 2-2 shows a photograph of some beams, plates, and shafts with their corresponding lengths. The "u"
stands for "units."

Figure 2-2.
Some beams, plates, and shafts and their lengths

Gears, for the most part, are described by the number of teeth they have. A 24t gear, for example, has 24 teeth. (The "t" stands
for "teeth.") Figure 2-3 shows a photograph of the various types of gears that come with the RIS kit.

There are two types of bushings in the RIS kit: regular and half-size. Both fit on shafts and are used for securing a shaft in
place or for spacing. Figure 2-4 shows the bushings.