Blades
Figure skates differ most visibly from hockey skates in having a set of large, jagged teeth called toe picks on the front of the blade. The toe picks are used primarily in jumping and footwork, and should not be used for stroking or spins. Toe pick designs have become quite elaborate and sometimes include teeth on the sides of the blade.
The skate blades are typically made of tempered carbon steel, coated with a high-quality chrome. Lightweight aluminum and stainless steel blades are becoming more popular with skaters. Blades are about 3/16 inch (4 mm) thick and may have a slightly tapered cross-section. There are different blades for different levels of skaters which often correspond to a skater's age, size and skill level. Blades for advanced skaters often have larger toepicks and different curves than blades for beginner, intermediate and recreational levels.
When viewed from the side, the blade of a figure skate is not flat, but curved slightly, forming an arc of a circle with a radius of 180-220 cm. This curvature is referred to as the rocker of the blade. The sweet spot of the blade is below the ball of the foot. This spot is usually located near the stanchion of the blade, and is the part of the blade where all spins are spun on.
The blade is also hollow ground; a groove on the bottom of the blade creates two distinct edges, inside and outside. The inside edge of the blade is on the side closest to the skater; the outside edge of the blade is on the side farthest from the skater. In figure skating it is always desirable to skate on only one edge of the blade, never on both at the same time (which is referred to as a flat). The apparently effortless power and glide across the ice exhibited by elite figure skaters fundamentally derives from efficient use of the edges to generate speed.
Ice dancers' and synchronized skaters' blades are about an inch shorter in the rear than those used by skaters in other disciplines, to accommodate the intricate footwork and close partnering in dance. They also possess a smaller pick near the bottom to allow for better edge-work and less focus on jumping.
Read more about this topic: Figure Skate
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