McKissick Sheave - 3/8 in x 8-1/2 in - Plain Bore

Product Description

The McKissick Ductile Iron Sheave is a heavy-duty wire rope sheave engineered for crane, hoist, and rigging block applications where superior strength, toughness, and reliable rope guidance are required. Featuring an 8-1/2 in outside diameter and a plain bore bearing configuration, this sheave is designed to accept wire rope up to 3/8 in diameter, making it well-suited for light to medium capacity lifting operations in construction, industrial, marine, and oilfield environments. Ductile iron construction provides a superior combination of strength, toughness, and impact resistance compared to standard cast iron, allowing the sheave to absorb shock loads without fracturing in dynamic lifting and rigging systems.

The ductile iron construction delivers excellent machinability and dimensional stability, ensuring precise rope groove geometry and consistent fit within block assemblies throughout the service life of the sheave. The 8-1/2 in outside diameter provides an excellent rope-to-sheave diameter ratio for a 3/8 in wire rope, substantially reducing bending stress on the rope during operation and contributing to extended rope service life and reduced maintenance intervals. The machined rope groove is precisely profiled to match the wire rope diameter, ensuring even load distribution across the rope cross-section and minimizing groove and rope wear throughout the service life of the assembly.

The plain bore bearing configuration provides a durable and cost-effective solution for intermittent-duty or lower-speed applications where anti-friction bearings are not required. This sheave is designed for use as a replacement or component part within McKissick and compatible wire rope block assemblies. Proper shaft fit, lubrication, and alignment are essential to achieving rated performance and maximizing service life in demanding industrial lifting and rigging operations.

Material: Ductile Iron

Compatible With: Wire Rope up to 3/8 in Diameter Standard Bore Shaft and Pin Arrangements McKissick Wire Rope Block Assemblies Compatible Replacement Block Assemblies

Uses: Crane and Hoist Block Assemblies Wire Rope Guidance and Load Transfer Construction and Industrial Rigging Marine and Offshore Block Systems Oilfield and Heavy Industry Lifting Applications Replacement Sheave for Block Assemblies

Key Features: 8-1/2 in Sheave Outside Diameter 3/8 in Maximum Wire Rope Capacity Plain Bore Bearing Configuration Ductile Iron Construction for Superior Strength and Impact Resistance Large Sheave Diameter Substantially Reduces Wire Rope Bending Stress and Fatigue Machined Rope Groove Profiled for Even Load Distribution McKissick Quality Construction