ball fountain
Granite floating sphere fountain/ball fountain/rolling sphere fountain /floating sphere fountains are perfectly balanced, polished stone sphere that fits into a socket (base) carved to the exact curvature of the ball. The sphere revolves 360 degrees in all directions and actually floats on a thin film of water.
Water is pumped up from beneath the socket, lubricating the ball and forcing it to turn gently—no belts, no pulleys, no rubber wheels! It operates at a surprisingly low pressure—around 10 psi. Once started, the ball continues to turn until the water is shut off. However, even a child can stop it, change the direction of spin, and set it on an accelerated twirl.Hydraulic pressure and lubrication allows very large masses to be moved.
HOW IT WORKS Push on the large granite ball to make it spin within its cradle.
THINGS TO TRY OR ASK AROUND THE EXHIBIT
FINDING THE SCIENCE IN YOUR WORLD Even very smooth surfaces have bumps that create friction when one surface moves across the other. In engineering workshops, liquid or air is often forced underneath heavy objects, to act as a lubricant and allow objects to move easily across or past each other
The space between the ball and the socket is about 8/1000th of an inch—too small Any motif or design can be engraved. Has a granite ball floating on a pressurized stream of recirculated water. This rotating globe is recommended for use in main entrances, shopping centers, gardens, etc.
It has a unique/special feature of having geometric center perfectly coinciding with the center of gravity. We can etch the map of the world or any other design on the ball as per customer requirement email us ballfountain@gmail.com
Sphere fountain Diameter in MM CM INCH: 300mm/30cm=12.0" 400mm/40cm=16.0" 500mm/50cm=20" 600mm/60cm=24" 700mm/70cm=28" 800mm/80cm=32" 900mm/90cm=36" 1000mm/100cm=40" 1200mm/120cm=48" 1500mm/150cm=60" 1800mm/180cm=72" 2000mm/200cm=80"
Water is pumped up from beneath the socket, lubricating the ball and forcing it to turn gently—no belts, no pulleys, no rubber wheels! It operates at a surprisingly low pressure—around 10 psi. Once started, the ball continues to turn until the water is shut off. However, even a child can stop it, change the direction of spin, and set it on an accelerated twirl.Hydraulic pressure and lubrication allows very large masses to be moved.
HOW IT WORKS Push on the large granite ball to make it spin within its cradle.
THINGS TO TRY OR ASK AROUND THE EXHIBIT
- How easy is it to spin the granite ball in its cradle?
- What do you notice about the granite ball and its cradle?
- Would you be able to spin this granite ball if it was sitting in a dry dish?
FINDING THE SCIENCE IN YOUR WORLD Even very smooth surfaces have bumps that create friction when one surface moves across the other. In engineering workshops, liquid or air is often forced underneath heavy objects, to act as a lubricant and allow objects to move easily across or past each other
The space between the ball and the socket is about 8/1000th of an inch—too small Any motif or design can be engraved. Has a granite ball floating on a pressurized stream of recirculated water. This rotating globe is recommended for use in main entrances, shopping centers, gardens, etc.
It has a unique/special feature of having geometric center perfectly coinciding with the center of gravity. We can etch the map of the world or any other design on the ball as per customer requirement email us ballfountain@gmail.com
Sphere fountain Diameter in MM CM INCH: 300mm/30cm=12.0" 400mm/40cm=16.0" 500mm/50cm=20" 600mm/60cm=24" 700mm/70cm=28" 800mm/80cm=32" 900mm/90cm=36" 1000mm/100cm=40" 1200mm/120cm=48" 1500mm/150cm=60" 1800mm/180cm=72" 2000mm/200cm=80"