Ronstan Series 55 Ratchet Orbit Block - Single - Swivel Head - Auto & Manual

Series 55 Ratchet Orbit Block - Single - Swivel Head - Auto & Manual. Automatic Ratchet Block: enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan offers a ratchet block with both auto and manual engagement modes. In auto mode the ratchet mechanism engages when load is applied, but switches off when it's released, letting the sheet run out smoothly and freely—great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. Try the block in both modes and see which you prefer. Awesome Ratchet Block Holding Power: Ronstan Ratchet Orbit Blocks have very high holding power. The sophisticated NC-machined sheave features Generation 2 cross-hole geometry with up to 21:1 holding power. The unique sheave design has 12 gripping faces to resist loaded line movement and minimise rope wear. Features include up to 20:1 holding power, smooth easing of sheets, high performance cleating, swivel stainless steel shackle head for unlimited block rotation and durability. Applications: mainsheet systems and spinnaker sheets on dinghies, sportsboats and small keelboats to 8M (26'); halyard, vang and backstay applications on boats to 8M (26'); spinnaker sheets on sportsboats and small keel boats (lateral lead blocks). Materials: Sheave: hard anodised aluminium; Ball Bearings: high compression strength carbon black acetal; Frame/Cheeks: toughened, glass fiber reinforced nylon; Rope Link: UV stabilized multi-strand impregnated SK75 Dyneema; Head fitting: grade 316 stainless steel.

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