What size pulley sheave diameter does a 1/2 inch rope need?

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Multiple Choice

What size pulley sheave diameter does a 1/2 inch rope need?

Explanation:
The size relationship tested is the minimum pulley diameter relative to rope size to avoid damaging the rope. The rule is to use a pulley sheave with a diameter at least four times the rope diameter. This keeps the rope bending gentle, reducing wear, heat, and the risk of kinking or crushing the fibers. For a 1/2 inch rope, four times that size is 2 inches, so a 2-inch pulley is the required minimum. Using a smaller pulley would bend the rope too sharply and accelerate wear; a larger pulley is also acceptable but exceeds the minimum.

The size relationship tested is the minimum pulley diameter relative to rope size to avoid damaging the rope. The rule is to use a pulley sheave with a diameter at least four times the rope diameter. This keeps the rope bending gentle, reducing wear, heat, and the risk of kinking or crushing the fibers.

For a 1/2 inch rope, four times that size is 2 inches, so a 2-inch pulley is the required minimum. Using a smaller pulley would bend the rope too sharply and accelerate wear; a larger pulley is also acceptable but exceeds the minimum.

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