Why Do Slides Have Weight Limits?

When users search “Why do slides have weight limits?” they're often troubleshooting a real problem: a sagging kitchen drawer, a jammed workshop cabinet, or a failed industrial storage unit. But beyond immediate fixes, this question opens the door to a deeper understanding of mechanical engineering, material science, and functional design. Drawer slides—whether in a luxury kitchen or a factory tool cart—are precision components with carefully calculated performance boundaries. Their weight limits aren't arbitrary; they reflect real physical constraints related to metal fatigue, bearing capacity, mounting integrity, and lifecycle durability. This article explores the technical rationale behind these limits, how they're determined, and why exceeding them—even slightly—can compromise safety and longevity.

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