A shear pin is a designed safety device used to protect machinery from excessive loads or overload conditions. It is a type of fastener that is intentionally weaker than the components it connects. When an excessive load is applied, the shear pin will break (or "shear off"), thus preventing damage to other, more critical parts of the machinery. Shear pins are commonly used in various applications, including: 1. **Gearboxes** - to protect gears from breaking under excessive torque.
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