What is the minimum pulley diameter recommended when pulling a cable with a 25 mm outside diameter?

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Multiple Choice

What is the minimum pulley diameter recommended when pulling a cable with a 25 mm outside diameter?

When pulling a cable, you must avoid tight bends that stress the cable and can cause damage. A common rule of thumb is to use a minimum bend diameter of about 15 times the cable’s outside diameter. With a 25 mm cable, that comes to 25 mm × 15 ≈ 375 mm. In practice, the closest standard pulley size is 381 mm (15 inches), which provides a sufficient bend radius to prevent kinking or jacket/conductor damage. Using smaller diameters would create tighter bends, increasing bending stress and risk of damage or degraded performance.

When pulling a cable, you must avoid tight bends that stress the cable and can cause damage. A common rule of thumb is to use a minimum bend diameter of about 15 times the cable’s outside diameter. With a 25 mm cable, that comes to 25 mm × 15 ≈ 375 mm. In practice, the closest standard pulley size is 381 mm (15 inches), which provides a sufficient bend radius to prevent kinking or jacket/conductor damage. Using smaller diameters would create tighter bends, increasing bending stress and risk of damage or degraded performance.

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