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2. Caster - Wikipedia

   en.wikipedia.org/wiki/Caster

   Many parameters play a role in how well the caster performs. Parameters such as tire hardness, tread width and shape, the length of the trailing offset (the 'caster') and wheel diameter all affect the effort required to start the platform moving. Harder wheels will make the caster easier to roll by reducing deformation resistance.

3. Omni wheel - Wikipedia

   en.wikipedia.org/wiki/Omni_wheel

   Omni wheels or poly wheels, similar to Mecanum wheels, are wheels with small discs (called rollers) around the circumference which are perpendicular to the turning direction. The effect is that the wheel can be driven with full force, but will also slide laterally with great ease. These wheels are often employed in holonomic drive systems.

4. Mecanum wheel - Wikipedia

   en.wikipedia.org/wiki/Mecanum_wheel

   A Mecanum wheel is an omnidirectional wheel design for a land-based vehicle to move in any direction. It is sometimes called the Swedish wheel or Ilon wheel after its inventor, Bengt Erland Ilon (1923–2008), [ 1 ] who conceived of the concept while working as an engineer with the Swedish company Mecanum AB, and patented it in the United ...

5. Office chair - Wikipedia

   en.wikipedia.org/wiki/Office_chair

   The wheels concentrate the bearing load onto small contact surfaces, and can damage some types of flooring materials, such as traditional hardwood, unless protected by a suitable hard mat. Rolling and swiveling used in combination permits a single office worker to command many different desks or workstations within a small office footprint ...

6. Mobile shelving - Wikipedia

   en.wikipedia.org/wiki/Mobile_shelving

   Mobile shelving, mobile aisle shelving, compactus, roller racking, or rolling stack, are terms applied to shelving or storage units fitted with wheeled traction systems. Units can be closely packed when access is not required, but can be readily moved to open up an aisle to allow access.

7. Hand truck - Wikipedia

   en.wikipedia.org/wiki/Hand_truck

   A hand truck. A hand truck, also known as a hand trolley, dolly, stack truck, trundler, box cart, sack barrow, cart, sack truck, two wheeler, or bag barrow, is an L-shaped box-moving handcart with handles at one end, wheels at the base, with a small ledge to set objects on, flat against the floor when the hand truck is upright. [1]