Ronstan RF46100 Series 40 Auto Ratchet Orbit Block, Single Swivel Head

The Ronstan RF46100 Series 40 Ratchet Orbit Block is a single-sheave automatic ratchet block with a swivel shackle head. In automatic models, the ratchet engages when load is applied and switches off when the load is released, so the sheet runs out smoothly and freely. This makes it well suited to rapid easing of the sheet and to gybing asymmetric spinnakers.

Key Features:

• Up to 14:1 holding power
• Fully automatic, load-sensing ratchet engagement
• Smooth easing of sheets
• Swivel shackle head for unlimited block rotation
• Stainless steel shackle head for durability and compatibility with harsh fixing points
• NC-machined sheave with Generation 2 cross-hole geometry and 8 gripping faces that resist loaded line movement and help minimize rope wear
• Dyneema® link is easy to fit and is held securely by a molded retainer clip. It can stay attached to one end of the block during fitting, so there are no shackle pins to lose
• Compatible with Dyneema®/Spectra® strops, webbing and carbon connection points

Materials:

• Sheave: hard anodized aluminum
• Ball bearings: high compression strength carbon black acetal
• Frame/cheeks: toughened, glass fiber reinforced nylon
• Rope link: UV-stabilized, multi-strand impregnated SK75 Dyneema®

Specifications:

• Sheave diameter: 40mm (1-9/16")
• Maximum rope diameter: 9mm (5/16")
• Maximum working load: 175kg (385lbs)
• Breaking load: 500kg (1,100lbs)
• Weight: 44g (1.5oz)

Applications:

• Dinghy mainsheet systems
• Mainsheet fine-tune systems on sportsboats and small keelboats
• Mainsheet systems on sportsboats using the RF7 mainsheet swivel cleat unit
• Spinnaker and jib sheets on dinghies, especially modern asymmetric classes
• Control line applications on larger yachts