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Print-In-Place Self-Levelling Gimbal Mount
This is a three-ring Cardan gimbal that prints in one piece. Two pairs of 5 mm pins sit 90° apart, so the 60 mm inner cup stays level on both axes while whatever it's bolted to tilts. That's useful for keeping a compass, a laser line, an IMU or a cup level on a boat, van or rover. The cup has four M3 heat-set bosses on a 30 mm square and a central M5 hole where you hang a ballast bolt. The outer ring is 96 mm across and mounts through M4 holes in the ears, which sit 110 mm apart. All rings have 1 mm of clearance and 0.5 mm around each pin, so the inner cup and middle ring can swing all the way round.
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