Answer
Jan 20, 2026 - 10:44 AM
Per the Wire Rope Technical Board in the Wire Rope User’s Manual, 4th Edition, the recommended minimum D/d ratio for 1/2″ 19×7 rotation-resistant wire rope is 34:1, which equates to a 17″ minimum sheave diameter. Since 17″ sheaves are uncommon, users typically select the next larger standard size (e.g., **18″ or 20″); while some manufacturers may allow smaller diameters, this guidance is based directly on the Wire Rope User’s Manual.
