Craft · 6 pages · 12 min
Why a serrated edge grabs
Serrations bite with points and saw, so the blade grabs instead of skating on a hard skin.
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From the opening
A serrated edge grabs because its points catch the surface while a plain edge would skate, and each point is a small wedge that puts force on a tiny spot. The valleys between points clear crumbs or fibers so the teeth can keep biting. The opening covers points catch before a plain edge, each tooth saws a little, and valleys clear crumbs and fibers.
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Inside
- Points catch before a plain edge
- Each tooth saws a little
- Valleys clear crumbs and fibers
- The scallops are hard to stone
- Where the idea stops applying
- A distinction worth keeping
Sources
- Serrated blade tooth geometry
- Point contact versus a continuous edge