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Two inline skate wheels with different durometer – 85A and 83A Digital Shore hardness tester. The Shore durometer is a device for measuring the hardness of a material, typically of polymers. [1] Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. Lower numbers indicate less resistance and softer ...
Aggressive skate wheels are usually between 54 and 72mm, while anti-rocker wheels are between 40 and 47mm. The balance between hardness and grip is the key to an optimum skate wheel. Anti-rocker wheels are small, hard wheels designed for grinding rather than rolling.
Urban skates Hockey skates. Inline skates are boots with wheels arranged in a single line from front to back, allowing a skater to roll along on these wheels. Inline skates are technically a type of roller skate, but most people associate the term roller skates with quad skates, another type of roller skate with a two-by-two wheel arrangement similar to a car.
They tend to last well, but can be easily damaged if used outdoors. Wheels for outdoor use are softer with a durometer of 82–87, and tend to wear more quickly. Harder outdoor wheels can also be used effectively indoors. Skaters sometimes combine different hardness wheels on the same skate in an attempt to achieve the best combination.
Inline wheels have a rounded profile and small contact widths. The typical range for inline wheel heights are 62–80mm. Typical hardness will be from 82A–90A. Inline artistic skaters have a more limited choice in wheels due to the fact that the wheel brand is often specific to and must correspond to the frame's brand to properly fit.
The superficial Rockwell scales use lower loads and shallower impressions on brittle and very thin materials. The 45N scale employs a 45-kgf load on a diamond cone-shaped Brale indenter, and can be used on dense ceramics. The 15T scale employs a 15-kgf load on a 1 ⁄ 16-inch-diameter (1.588 mm) hardened steel ball, and can be used on sheet metal.
A variety of hardness-testing methods are available, including the Vickers, Brinell, Rockwell, Meyer and Leeb tests. Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table for steels .
Hardness scales may refer to: Methods of measuring mineral hardness. Scratch hardness. The Mohs scale of mineral hardness; The Vickers hardness test;