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2. Ball transfer unit - Wikipedia

   en.wikipedia.org/wiki/Ball_transfer_unit

   Ball transfer unit Cross-section through a spring-loaded ball transfer unit with a polymer seal ring and a drain hole in the bottom. A ball transfer unit is an omnidirectional load-bearing sphere mounted inside a restraining fixture. They are identical in principle to a computer trackball (pointing device). Typically the design involves a ...

3. Caster - Wikipedia

   en.wikipedia.org/wiki/Caster

   A swivel caster. A caster (or castor) is an undriven wheel that is designed to be attached to the bottom of a larger object (the "vehicle") to enable that object to be moved. Casters are used in numerous applications, including shopping carts, office chairs, toy wagons, hospital beds, and material handling equipment. High capacity, heavy duty ...

4. Brinelling - Wikipedia

   en.wikipedia.org/wiki/Brinelling

   Brinelling / ˈ b r ɪ n ə l ɪ ŋ / is the permanent indentation of a hard surface. It is named after the Brinell scale of hardness, in which a small ball is pushed against a hard surface at a preset level of force, and the depth and diameter of the mark indicates the Brinell hardness of the surface.

5. Small ball (baseball) - Wikipedia

   en.wikipedia.org/wiki/Small_ball_(baseball)

   Stolen bases are one element of small ball. Here, the all-time stolen base leader, Rickey Henderson, swipes third in 1988. In the sport of baseball, small ball is an informal term for an offensive strategy in which the batting team emphasizes placing runners on base and then advancing them into scoring position for a run in a deliberate, methodical way.

6. Omni wheel - Wikipedia

   en.wikipedia.org/wiki/Omni_wheel

   They are often used in intelligent robot research for small autonomous robots. In projects such as VEX Robotics, Robocup and FIRST Robotics, many robots use these wheels to have the ability to move in all directions. Omni wheels are also sometimes employed as powered casters for differential drive robots to make turning faster. Omniwheels are ...

7. The Most Comfortable Swivel Chairs of 2024, Vetted by ... - AOL

   www.aol.com/most-comfortable-swivel-chairs-2024...

   The chair's hidden base features a steel ball-bearing mechanism for a smooth, 360-degree swivel and the standard 22-inch seat depth can be extended to an extra-deep 27 inches, if you choose the ...