Ronstan Series 30 Single Becket Lashing Orbit Block

The Ronstan Series 30 Single Becket Lashing Orbit Block is a lightweight option for dinghy and small-boat purchases that benefit from soft attachment and an integrated becket. The lashing head removes the bulk of a conventional metal shackle and lets the rigger choose the final attachment geometry. A becket built into the block provides a clean anchor for the standing end of a multi-part purchase. Ronstan lists the Series 30 Orbit range for mainsheet and spinnaker systems on dinghies to about 5m (16 ft), along with halyard, vang, and backstay controls.

The sheave runs on a two-stage bearing arrangement that combines ball bearings for easy movement with secondary support as the load rises. Fiber-reinforced cheeks keep the body light, while corrosion-resistant fittings protect the main load path in wet service. The lashing attachment gives more freedom than a fixed shackle head but makes the soft attachment line an important structural part of the system. Its low-profile construction is particularly useful where a metal head would add unwanted height to the purchase.

• Soft lashing head for flexible attachment
• Integrated through-sheave becket
• Two-stage low-friction bearing system
• Low-profile Series 30 Orbit construction

Choose lashing line and a tying method appropriate for the load carried by the block, and protect the soft attachment from chafe against surrounding hardware. The standing end should leave the becket cleanly while the working line remains centered in the sheave. Inspect both the lashing and becket whenever the running rigging is serviced, because either can affect the integrity of the complete purchase. For more soft-attachment blocks and small-boat rigging hardware, browse more Sailing Hardware.