Ronstan Series 40 Orbit BB Triple Block w/Becket & Swivel Shackle

The Ronstan Series 40 Orbit BB Triple Block with Becket & Swivel Shackle is a precision load-handling component engineered for rigging systems where reliability and controlled movement are non-negotiable. Originally designed for marine and sailing applications, this triple block assembly has earned recognition among automotive enthusiasts and fabricators who demand pulley systems for engine hoists, cable routing, and custom lift mechanisms. Whether you're managing a heavy engine pull during a full rebuild or setting up a shop lifting rig, this block delivers the performance characteristics that separate professional-grade equipment from consumer alternatives.

Built with ball-bearing orbit blocks, the Series 40 assembly provides class-leading dynamic and static load ratings, ensuring smooth, low-friction operation under sustained tension. The triple-block configuration multiplies mechanical advantage while the swivel shackle eliminates binding and allows natural rotation as loads shift—critical when working with angled pulls or complex rigging geometry. The integral becket attachment point enables direct integration into custom cable systems without additional hardware, reducing assembly complexity and failure points. At just 0.4 lbs with compact 3 x 2 x 4-inch dimensions, the unit maintains portability without sacrificing the structural integrity needed for automotive shop environments.

Shop mechanics, fabricators, and serious DIY engine builders benefit most from this block when designing compound pulley systems for engine hoists, transmission jacks, and multi-directional load handling. The swivel shackle proves invaluable during angled pulls where standard fixed blocks would create binding friction or uneven load distribution. This assembly integrates seamlessly with standard rope, cable, and rigging hardware, making it compatible with both professional shop setups and custom one-off lifting frames. Verify your rope diameter and working load limits align with the block's rated capacity before installation to ensure safe operation.