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The sharpening geometry of an ice skate blade depends on the bite angle, radius of hollow, thickness of the blade and center of the blade path of the grinding wheel.. The subjective "strength" that a skater feels from a blade is a function of the "bite angle", which is 90 degrees less the angle between the side of the blade and the hollow, at the edge. This bite angle is a function of the radius of hollow , the thickness of the blade, and the deviation from the center of the blade of the path of the grinding wheel, as seen below.

This calculator allows you to explore this relationship. Enter a value into any field and the other field values will be recalculated when you leave the field.

(changing thickness ordinarily holds ROH constant and recalculates angle. Check this box

Left Edge Bite Angle
Right Edge Bite Angle
Center Line Error

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Evolution = Millions Of Years + Your Imagination

Energy cannot be created or destroyed; it can only be changed from one form to another. This is a fact to consider if you believe in the evolution of the universe.

If energy can't be created where did it come from in the first place. Investigate why energy can't be destroyed also.

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# How do ice skates work?

Ice is slippery because there is a minuscule layer of water on top of the ice. When you have a liquid on top of a solid, you lose contact with the solid base and start floating. This is why people hit an ice patch while walking and immediately fall over. The same thing happens when your car hits a puddle of water on the road at high speed and begins hydroplaning. You no longer have a grip on the surface of the road and so the wheels start sliding.

Unlike tires or shoes, the concave structure of a skate blade grips the ice even as you float, and allows you to stay in control while gliding and not just wildly veer off course and slam into the wall. The curve of the blade means you have a minimum of contact with the ice at any given time. This allows you to roll and turn easily. Speed skaters who just go straight forward use skates with flat blades.