What type of rope works best for capstan hoists?

• A. Synthetic
• B. Natural Fiber Rope
• C. Wire Rope
• D. Cotton Rope

Answer: (A)

Capstan hoists rely on friction between the rope and the capstan to multiply and transmit load. Because the rope wraps around a rotating cylinder, you want a line that stays strong under load, doesn’t creep much, and can stand up to abrasion from rubbing over metal and through many wraps. Synthetic ropes fit this need best: they offer a high strength-to-weight ratio, are relatively low in stretch (so the applied load remains predictable and controllable), resist creep over time, and hold up well against wear and abrasion. They’re also lighter and easier to handle than alternatives, which improves safety and ease of use.

Natural fiber or cotton ropes tend to absorb moisture, swell, lose strength, and creep more under load, making them unreliable for a capstan where consistent grip and predictable performance are critical. Wire rope, while very strong, is stiff, heavy, and can wear grooves or nick the rope when it runs around a capstan, reducing grip and increasing the risk of damage or failure. In the context of capstan hoists, synthetic rope provides the best combination of strength, control, and durability, making it the preferred choice.