Ronstan RF15151 15mm Single Cheek Block – Series 15 Pulley NZ
The Ronstan RF15151 Series 15 Single Cheek Block is a compact, high-performance pulley designed for fixed mounting and efficient line redirection on dinghies, trailer yachts, and small keelboats. Its dual mounting holes provide superior stability, making it ideal for deck, mast, and boom installations.
Built with a 15mm UV-stabilised acetal sheave running on stainless steel ball bearings, the RF15151 delivers exceptionally smooth, low-friction performance—ensuring precise control of sail handling systems.
The 316 stainless steel cheeks offer excellent strength and corrosion resistance, ensuring long-term durability in New Zealand’s demanding marine conditions.
Designed for low-load, high-speed applications, this block is commonly used for vangs, cunninghams, control lines, and shock cord systems, where compact size and efficiency are essential. Key Features
- Twin-hole cheek mounting for secure and stable installation
- 15mm ball bearing sheave for ultra-low friction performance
- Compact and lightweight design (approx. 8–9g)
- UV-stabilised acetal sheave for durability
- 316 stainless steel cheeks for corrosion resistance
- Designed for precision control line handling
- Ideal for dinghies, catamarans, and small keelboats Specifications
- Sheave Diameter: 15mm
- Max Rope Diameter: 5mm
- Maximum Working Load: 120kg
- Breaking Load: 550kg
- Weight: approx. 8.5–9g
- Mounting: 2 x fastener holes (approx. 4mm)
- Materials: Acetal sheave, stainless ball bearings, 316 stainless cheeks
- Type: Single cheek block (fixed mount) Why Choose the Ronstan RF15151?
For New Zealand sailors, compact and efficient rigging is essential—especially on dinghies and performance setups. The RF15151 provides a simple, durable solution for fixed line routing, ensuring consistent alignment and minimal friction.
Compared to single-mount cheek blocks (like RF15151A), the twin mounting holes offer greater stability under load, making it better suited for higher load control lines and more permanent installations.