Ronstan RF51151 50mm Cheek Block | Fixed-Mount Series 50 Sailing Pulley

The Ronstan RF51151 is a compact and durable 50mm cheek block designed for permanent mounting on decks, spars, or bulkheads. Built for medium-load applications, this block is ideal for sheets, outhauls, vangs, and control lines on dinghies, keelboats, and small yachts.

Part of the Ronstan Series 50, the RF51151 features a UV-resistant acetal sheave and 316 stainless steel cheeks for exceptional strength and long-term resistance to corrosion. Its fixed-mount design ensures clean, low-profile rigging where reliability is key.

✅ Key Features

• Ronstan RF51151 – 50mm fixed-mount cheek block

• UV-stabilised acetal sheave for smooth, low-friction performance

• 316 stainless steel cheeks for marine-grade strength and corrosion resistance

• Ideal for outhauls, sheets, cunningham, vang systems, and control lines

• Suitable for deck, mast, or bulkhead mounting

• Medium-load capacity for small to mid-sized boats

• Low-maintenance and compact design

• Part of Ronstan's Series 50 sailing hardware range

Ronstan RF51151 50mm Cheek Block specifications:

• Sheave Diam. 50mm
• Max. Rope Diam. 12mm
• Max. Working Load 1100 lb
• Breaking Load 2200 lb