inventory of gears
LEGO has released various types of gears throughout the
history of the Technic line. The gears can be divided into
a few different groups, and we will discuss them group by
group. First, we’ll examine the most common and familiar
gears.
As you can see in Figure 5-11, the group of common
and familiar gears consists of one special gear called a worm
gear (first on the left), five gears of a new type called bevel gears (tan), and nine old-type gears (presented in their most
common colors). Despite their differences, almost any two of
these gears can be meshed together. The unique property of
the bevel gears is that they can be meshed in both a parallel
and a perpendicular manner. Their size makes them better
suited for use in studless constructions, while the shape of
their teeth makes it impossible to put LEGO chains on them.