Ronstan RF35302 Series 30 BB Orbit Block Triple 30mm

The Ronstan Series 30 BB Orbit Block Triple delivers exceptional strength-to-weight performance for modern sailing rigging systems. This 30mm triple block features an innovative two-stage bearing system and engineered composite construction that makes it ideal for mainsheets, boom vangs, backstays, halyard tuning systems, Cunninghams, and other control lines on dinghies through larger yachts.

Advanced Two-Stage Bearing System:

• High compression acetal orbital ball bearings migrate to loaded areas of the sheave for efficient handling of light to moderate loads
• PTFE-impregnated nylon bearing with carbon fiber reinforcement supports higher static loads
• Smooth operation throughout the entire load range with both conventional and high-tech lines

Lightweight Engineered Design:

• Glass fiber reinforced nylon cheeks and head provide maximum strength with minimal weight
• Thinner cheeks between sheaves reduce overall weight while effectively separating lines
• Hollow bearing at sheave center serves as integrated becket for additional versatility
• Can be converted to soft attachment using Dyneema link (Ronstan RF9003-70 sold separately)

High-Performance Materials:

• UV-resistant acetal high compression sheave compatible with 5/16" (8mm) conventional doublebraid and high-tech 12-strand lines
• Shackle pin diameter: 5/32"
• Highest working load capacity in its class

The triple sheave configuration is particularly well-suited for applications requiring line separation and multiple turning points, making it an excellent choice for backstay systems, boom vangs, mainsheet systems, and general dinghy control lines that are cleated remotely.