Great Ball Contraption

Back to Lego Construction Basics

Back to Advanced Lego Models

Click here to see the GBC in action.


Using the instructions below, try building the Ball Contraption.
If something is not clear, please ask Mr. Kulzer.

1


2


3


4


5


6


7


8


9



10


11


12


13
#5 gray axle


14


15


16


17
#9 gray axle, #4 black axle


18


19



20


21


22


23


24


25
Turn the construction around and flip the lift up.


26


27
Return the construction to it's original orientation.


28


29



30


31


32


33
# 9 gray axle


34


35


36


37


38


39



40


41


42


43


44


45


46
# 7 gray axle


47


48


49
# 4 black axle


50


51


52


53


54


55


56


57


58


59
# 8 black axle


60


61


62


63


64


65


66


67


70


71


72


73


74


75


76


77


78


79


80


81


82


83
# 9 gray axle


84


85


86


87
# 12 black axle


88


89


90


91


92


93


94
# 5 and # 3 gray axles


95


96


97


98


99


100
Note where the black pins are inserted


101


102


103


104


105


106


107


108


109


110


111
# 9 gray axle


112


113


114


115


116


117


118


119


120
Note the angle of each part connecting the beam you added. Please make sure it looks like this picture.


121
Note the angle of the lift levers in this picture. The angle/timing of the lift levers is critical.

121b
To adjust the angle of the lift levers, pull the #24 gear out (See red arrow) until the others can be adjusted, then push it back in.


122


123


124


125


126


127
Flip the whole assembly upside-down.


128


129


130


131


132


133


134


135
Flip the whole assembly rightside-up again.


136


137


138


139


139b


140


141


142


143


144


145


146


147


148
Use a #3 black angle connector.


149


150


151


152


153
Flip this assembly over.


154


155


156


157


158


159


160


161


162


163


164


165
#5 gray axle


166


167


168


169


Back to top
170


171
#5 gray axles


172


173


174


175


176


177


178


179
# 5 gray axle


180


181


182


183


184


185


186


187


188


189


190


191


192




Back to top