Sheaves

Sheaves are the grooved wheels inside blocks, crane systems, and other rigging assemblies that guide and support wire rope as it moves under load. The sheave's groove profile must match the wire rope diameter — an undersized groove pinches and damages the rope, while an oversized groove allows the rope to flatten and wear prematurely.

Sheave diameter relative to wire rope diameter (the D/d ratio) directly affects both wire rope service life and sling capacity. Larger D/d ratios reduce bending stress on the wire rope, extending its fatigue life. Smaller D/d ratios increase bending stress and accelerate wire breakage. ASME B30.9 and B30.2 specify minimum D/d ratios for various applications.

Sheaves wear over time — the groove profile gradually widens and changes shape as the wire rope runs across it. Worn sheave grooves must be measured and replaced when they no longer properly support the rope. Sheave bearings also require regular lubrication and inspection.

Amick stocks replacement sheaves from our Pittsburgh facility.

Protect your wire rope with properly sized sheaves — stocked in Pittsburgh. Call 412-429-1212.

Type

Replacement sheaves for rigging blocks, crane systems, and wire rope assemblies. Various diameters and groove profiles.

Applications

Crane systems, rigging blocks, hoists, elevators, and any wire rope-driven system requiring sheaves for rope guidance and direction change. Replacement of worn sheaves to maintain proper rope support and extend wire rope service life.

Exceptions

Sheave groove must match the wire rope diameter — verify gauge before installation. Inspect groove profile for wear, cracks, and proper shape using a sheave gauge. Check bearings for smooth rotation and proper lubrication. A worn or damaged sheave will rapidly degrade wire rope, leading to premature failure. Replace sheaves when groove wear exceeds manufacturer tolerances.