Page 223 - Lego Mindstorms

Robot 8 • The ULK (Useful LEGO Knowledge)

Arm Step 1

Arm Step 2

All of the force required to raise ULK’s arm is transmitted
through the two bevel gears at the base of the shoulder.
This generates lots of stress on the parts holding the gears
in place. The strange bracket built out of the 3L liftarms
and perpendicular axle joiner is definitely strong enough to
hold the bevel gears together.

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