McKissick TU-481 Snatch Block - 1-1/4 in - 60 Ton - 18 in - Roll-Forged

Product Description

The McKissick TU-481 Snatch Block in the 60 Ton, 18-inch sheave configuration is a heavy-duty, high-capacity snatch block engineered for demanding rigging and lifting operations requiring reliable performance at maximum working load capacities. Designed to accommodate wire rope up to 1-1/4 inches in diameter, this block features an 18-inch outside diameter roll forged sheave that provides a strong, fatigue-resistant rope contact surface suited to the high line loads and repeated load cycles common in crane rigging, offshore operations, and heavy construction applications. Roll forging produces a sheave with a refined, dense grain structure that delivers superior toughness and resistance to the extreme mechanical stresses encountered in oilfield, offshore, heavy marine, and large-scale construction rigging operations.

The TU-481 is fitted with tapered roller bearings with seals, providing efficient distribution of both radial and axial loads while the sealed bearing housing prevents ingress of water, grit, and field contaminants. This bearing configuration ensures smooth, low-friction sheave rotation under sustained heavy loads, minimizes rope wear at the sheave groove, and reduces maintenance frequency in remote or offshore locations where regular servicing is not practical. The sealed tapered roller bearing arrangement is well suited to the combined loading conditions and harsh environmental exposure inherent in heavy industrial and offshore snatch block applications at 60 Ton working loads with 1-1/4 inch wire rope.

As a snatch block, the TU-481 incorporates an openable side plate for lateral wire rope insertion without threading the rope end through the block, enabling rapid rigging changes and efficient load line redirection under field conditions. The 18-inch sheave diameter provides a suitable rope bend radius for 1-1/4 inch wire rope at 60 Ton working loads, supporting rope integrity and reducing fatigue in sustained high-load rigging applications. For applications where an extended rope bend radius is required, the 24-inch sheave variant in the TU-481 series offers additional rope protection at the same capacity. This block is appropriate for heavy crane and derrick rigging, offshore platform operations, pipeline construction, heavy haul and pull applications, and multi-part line configurations. Always confirm working load limits, wire rope diameter compatibility, and pin dimensions before placing the block into service.

Material:

Roll Forged Sheave Tapered Roller Bearings with Seals

Compatible With:

Wire Rope up to 1-1/4 in Diameter

Uses:

Heavy Crane and Derrick Rigging and Load Redirection Offshore Platform and Marine Lifting Operations Oilfield and Pipeline Construction Rigging Heavy Haul and Pull Operations Multi-Part Line and Block and Tackle Configurations

Key Features:

60 Ton Capacity 1-1/4 in Maximum Wire Rope Diameter 18 in Sheave Outside Diameter Roll Forged Sheave for Superior Strength and Fatigue Resistance Tapered Roller Bearings with Seals for Heavy Load Performance and Contamination Protection Snatch Block Design for Lateral Rope Entry Without Threading McKissick TU-481 Series Suitable for Heavy-Duty Industrial, Offshore, and Marine Rigging Applications