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A cam follower, also known as a track follower, [1] is a specialized type of roller or needle bearing designed to follow cam lobe profiles. Cam followers come in a vast array of different configurations, however the most defining characteristic is how the cam follower mounts to its mating part; stud style cam followers use a stud while the yoke style has a hole through the middle.
Roller sports are sports that use human powered vehicles which use rolling either by gravity or various pushing techniques. Typically ball bearings and polyurethane wheels are used for momentum and traction respectively, and are attached to devices or vehicles that the roller puts his weight on. The international governing body is World Skate.
A roller skate has two main parts: the boot and the plate, which is the part that holds the wheels and provides the ability to steer. There are two main categories of roller skate boots: a high-top boot with a raised heel similar to an ice figure skating boot, and a flat-soled boot cut at or below the ankle.
A pair of Heelys. Heelys (formerly known as Heeling Sports Limited) is an American brand of roller shoe (marketed by Heelys, Inc.) that have one or more removable wheels embedded in each sole, similar to inline skates, allowing the wearer to walk, run, or, by shifting their weight to their heels, roll.
Unidentified woman roller skater, c. 1860–1870 Roller skates in the United States around 1905. The earliest roller skates known are from 18th-century Europe. These skates were used in theater and musical performances, possibly to simulate ice skating onstage. Early roller skating was done in a straight line because turning or curving was very ...
The following is a list of notable roller skaters and inline skaters. The list is sorted by roller skating disciplines (inline speed skating, roller inline hockey, downhill, artistic roller skating), gender and competing nationality. Note that some definitions of roller skating include inline, while others intend to specify quad skates.
A man inline skating at Vondelpark in Amsterdam.. Inline skating is a multi-disciplinary sport and can refer to a number of activities practiced using inline skates.Inline skates typically have two to five polyurethane wheels depending on the style of practice, arranged in a single line by a metal or plastic frame on the underside of a boot.
Artistic roller skaters skate on quad skates or inline skates (for the inline free skating discipline). Skates consist of four essential parts: boots, plates, wheels, and bearings. Skaters may sometimes use jump bars on their plates for added stability. Free skaters (both quad and inline) have a toe stop on their plates.
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