Ronstan RF20332 Triple Block with Becket & Cam Cleat 20mm – Series 20 Ball Bearing

The Ronstan RF20332 Triple Ball Bearing Block with Becket & Cam Cleat (20mm) is a compact, high-performance all-in-one control solution designed for modern sailing systems.

Built for efficiency, this block features three 20mm acetal sheaves running on precision stainless steel or Torlon® ball bearings, delivering exceptionally low friction and smooth operation under both dynamic and static loads.

The integrated becket allows for cascading purchase systems, while the cam cleat provides fast, secure line locking and easy release, making it ideal for frequently adjusted control lines such as vangs, cunninghams, and traveller systems.

A standout feature is the 2-axis shackle head, which can be fixed at 0° or 90°, allowing flexible alignment with load direction and improving overall system efficiency.

Constructed with UV-stabilised acetal sheaves, fibre-reinforced nylon cheeks, and 316 stainless steel load components, the RF20332 is engineered for strength, durability, and long-term performance in harsh marine environments.

With a maximum working load of 400kg and breaking load of 850kg, this compact block delivers exceptional performance for its size—perfect for high-performance dinghies, skiffs, and small keelboats.

Key Features

• Triple 20mm sheaves – high mechanical advantage
• Ball bearing system – ultra-low friction performance
• Integrated becket – enables cascading purchase systems
• Cam cleat included – fast and secure line handling
• 2-axis shackle head – adjustable alignment (0° or 90°)
• High load capacity (400kg MWL / 850kg BL)
• Durable composite construction – corrosion-resistant
• Compact and lightweight (~122g)

Specifications

• Brand: Ronstan
• Model: RF20332
• Series: 20 Ball Bearing
• Product Type: Triple block with becket & cam cleat
• Sheave Diameter: 20mm
• Max Rope Diameter: 6mm
• Pin Diameter: 4mm
• Maximum Working Load: 400kg
• Breaking Load: 850kg
• Cleat Load Limit: ~125kg
• Weight: ~122g
• Materials:
  • UV-stabilised acetal sheaves
  • Stainless steel ball bearings
  • 316 stainless steel load strap
  • Fibre-reinforced nylon cheeks

Ideal Applications

• Vang systems
• Cunningham and outhaul controls
• Traveller systems
• High-performance dinghy rigging
• Cascading purchase systems

This block is ideal when you need maximum control, mechanical advantage, and compact integration of cleating and purchase in one unit.

Why Buy from Barton Marine NZ?

• Trusted NZ Ronstan supplier
• Fast nationwide delivery
• Genuine high-performance sailing hardware
• Ideal for NZ racing and cruising conditions

Pro Tip 

• Use in cascading systems to maximise purchase without adding bulk
• Mount the cleat within reach for fast trimming adjustments
• Pair with low-stretch Dyneema lines for best performance