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2. Skateboard - Wikipedia

   en.wikipedia.org/wiki/Skateboard

   Each skateboard wheel is mounted on its axle via two ball bearings. With few exceptions, the bearings are the industrial standard "608" size, with a bore of 8 or 10 mm (0.315 or 0.394 inches) depending on the axle, an outer diameter of 22 mm (0.866 inches), and a width of 7 mm (0.276 inches).

3. List of skateboarding terms - Wikipedia

   en.wikipedia.org/wiki/List_of_skateboarding_terms

   Bearings consist of 6, 7, or 8 balls enclosed in races between two shields encased in a disc-like body. Bearings can be measured by an ABEC rating. Skateboard bearings typically come in sets of eight and are inserted into both sides of the wheel; two bearings for each of the four wheels.

4. Grind (skateboarding) - Wikipedia

   en.wikipedia.org/wiki/Grind_(skateboarding)

   Grinding is damaging to materials which are not hardened for the specific purpose of the sport, as may be found in a skate park. The trucks are composed of a hard metal without lubricant or bearings on the grinding surface, so they literally do grind on the objects they slide across. Grinding can strip paint off of steel and wear down the edges ...

5. ABEC scale - Wikipedia

   en.wikipedia.org/wiki/ABEC_scale

   The ABEC scale is designed to provide bearing manufacturers dimensional specifications that meet the standards of precision bearings in a specified class. The scale is also used by manufacturers who produce equipment that require bearings must also know the dimensional tolerances to design parts that will accommodate a bearing.

6. Powell Peralta - Wikipedia

   en.wikipedia.org/wiki/Powell_Peralta

   The company rose to prominence in the 1980s as skateboarding began maturing as a sport. The company featured the Bones Brigade, a team featuring the era's top competitors. Peralta left the company in 1991 and Powell continued to produce skateboard equipment as Powell, Bones Bearings and RollerBones.

7. Longboard (skateboard) - Wikipedia

   en.wikipedia.org/wiki/Longboard_(skateboard)

   Longboard bearings are all about reducing unnecessary friction to allow flawless stunt. [14] Bearings connect the wheel to turn smoothly. Bearings can be made of many materials, including steel (which is most prevalent), titanium, or ceramics. Ceramic bearings are the most expensive. Bearings are usually rated in the ABEC scale. The ratings run ...

8. Free Online Games: Play board games, card games, casino ... - AOL

   www.aol.com/games

   Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

9. Linear-motion bearing - Wikipedia

   en.wikipedia.org/wiki/Linear-motion_bearing

   A linear-motion bearing or linear slide is a bearing designed to provide free motion in one direction. There are many different types of linear motion bearings. Motorized linear slides such as machine slides, X-Y tables , roller tables and some dovetail slides are bearings moved by drive mechanisms.