This is a very large and very rare gear. It has an impressive
diameter equal to 26 studs, and it has 168 teeth on the
inner ring. The whole gear is 3 studs thick, its inner teeth are
1 stud wide, and it has 1-stud-deep troughs on both sides.
This makes it relatively easy to drive, either by building some
structure inside it or by attaching it to an external structure.
The gear got its name from the only set it appears in:
It’s the wheels of the 4481 Hailfire Droid. Since the set is no
longer produced and there were only two gears of this type
included in each set, they have become rare and expensive.
Hailfire Droid wheel gears are highly desired for use as
turntables in very large models. With two gears like this, it is
possible to put them on top of each other, filling the troughs
on their facing sides with up to 41 LEGO balls (see Figure 5-25). The resulting mechanism acts like a ball bearing,
which makes it capable of rotating under significant loads;
additionally, the sheer size of the gear makes it very stable.
This is a very large and very rare gear. It has an impressive
diameter equal to 26 studs, and it has 168 teeth on the
inner ring. The whole gear is 3 studs thick, its inner teeth are
1 stud wide, and it has 1-stud-deep troughs on both sides.
This makes it relatively easy to drive, either by building some
structure inside it or by attaching it to an external structure.
The gear got its name from the only set it appears in:
It’s the wheels of the 4481 Hailfire Droid. Since the set is no
longer produced and there were only two gears of this type
included in each set, they have become rare and expensive.
Hailfire Droid wheel gears are highly desired for use as
turntables in very large models. With two gears like this, it is
possible to put them on top of each other, filling the troughs
on their facing sides with up to 41 LEGO balls (see Figure 5-25). The resulting mechanism acts like a ball bearing,
which makes it capable of rotating under significant loads;
additionally, the sheer size of the gear makes it very stable.
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