McKissick J-452 Trawl Block - 10 Ton - 12 in - Tapered Roller Bearing - Steel

Product Description

The McKissick J-452 Double Rig Trawl Block is a heavy-duty marine block engineered specifically for double-rig trawling operations in commercial fishing applications, where reliable performance under sustained dynamic loads and harsh saltwater conditions is essential. Rated for a 10-ton working load limit, this block is built around a 12-inch outside diameter steel sheave supported by a tapered roller bearing, providing high radial and axial load capacity and precise rope alignment during the demanding cycles of trawl wire deployment and retrieval. The J-452 series is designed to meet the rigorous requirements of commercial fishing vessels operating double-rig trawl gear.

The double-rig configuration indicates this block is designed for use in paired trawl systems where two trawl doors and nets are deployed simultaneously from outriggers or gallows frames, a common arrangement in shrimp and demersal fish trawling operations. The tapered roller bearing delivers superior load capacity and durability compared to standard bushing or ball bearing configurations, supporting the high and variable loads experienced during trawl wire tension changes as the vessel maneuvers and the gear is set, towed, and hauled back. The steel sheave construction provides the strength and wear resistance required for continuous contact with wire rope under the abrasive and corrosive conditions of a marine working environment. The larger 12-inch sheave diameter compared to the 8-inch variant in the same series provides a more generous rope bend radius, reducing wire rope fatigue and extending rope service life in high-cycle trawl operations.

The McKissick J-452 is a purpose-built commercial fishing block designed for the specific demands of double-rig trawl operations, where block reliability directly affects fishing efficiency and vessel safety. This block is well suited for installation on trawl gallows, outrigger blocks, and deck rigging systems on commercial fishing vessels operating in offshore and coastal trawling fisheries.

Material:

Steel (body and side plates) Steel sheave Tapered roller bearing

Compatible With:

Wire rope trawl wire systems Double-rig trawl gear configurations

Uses:

Double-rig trawl wire guidance and load bearing on commercial fishing vessels Trawl door and net deployment and retrieval Gallows frame and outrigger block applications Offshore and coastal commercial trawl fishing operations

Key Features:

10 Ton working load limit 12 in sheave outside diameter Steel sheave for strength and wear resistance in marine environments Tapered roller bearing for high radial and axial load capacity Larger sheave diameter for improved rope bend radius versus 8 in variant Purpose-built for double-rig trawl fishing applications Designed for sustained dynamic loads in saltwater environments McKissick J-452 series