Ronstan Series 30 Utility Ball Bearing Block - Single, Swivel Shackle Head

The Ronstan Series 30 Utility Ball Bearing Block with Single, Swivel Shackle Head is a precision rigging component engineered for vehicle suspension systems, winch installations, and mechanical load-bearing applications. This marine-grade block serves as a redirect pulley and load-bearing point in custom automotive setups where smooth, controlled line routing is critical. Whether you're building a custom recovery system, upgrading a winch array, or fabricating a specialized pulley arrangement for your vehicle modification project, this utility block delivers the reliability and smooth operation that professional installers and serious vehicle builders demand.

Built with ball bearing internals, the Ronstan Series 30 block minimizes friction loss during load transfer and reduces wear on your rigging line under sustained tension. The swivel shackle head design allows the block to rotate freely without binding, making it ideal for dynamic applications where load direction changes or angle adjustments are necessary. At just 0.7 lbs and compact at 2 × 1 × 3 inches, it integrates seamlessly into tight engine compartments and suspension frames without adding unnecessary weight. The corrosion-resistant construction ensures longevity in both on-road and off-road environments, while the robust stainless-steel shackle maintains structural integrity under repeated use and heavy loading cycles.

Mechanics and fabricators commonly specify the Ronstan Series 30 for custom winch systems, vehicle recovery rigs, and auxiliary pulley arrangements on lifted trucks and expedition builds. The swivel functionality makes it invaluable when line paths require angular load redirection without traditional block rotation points. Installation is straightforward—bolt the shackle head to your frame or mounting bracket—and compatibility extends across most winch configurations and generic rigging applications. For anyone serious about professional-grade vehicle modifications that demand equipment reliability, this utility block provides the precision engineering and fail-safe operation that separates amateur builds from show-quality results.