Ronstan RF285 Series 30 Utility Turning Block with Cheek

The Ronstan RF285 is a lightweight, economical utility block designed for control line applications where simplicity and reliability are essential. Part of the Series 30 line, this 29mm cheek block with curved base is ideal for mast-mounted turning blocks, externally run outhaul systems, and trapeze retriever systems.

Premium Construction:

• 316 stainless steel cheeks provide exceptional strength and superior corrosion resistance in marine environments
• UV-stable acetal sheave resists sun damage and delivers long service life
• 29mm sheave diameter accommodates 5/16" (8mm) line
• Solid riveted construction requires virtually no maintenance
• Curved base design fits contoured mounting surfaces

Versatile Mounting Options:

• Hollow rivets allow fastening with screws, shackles, or lashing
• Rivet can function as a becket for additional purchase when needed
• Simple maintenance—just rinse occasionally with fresh water

Perfect for dinghies and small sailboats, this utility block delivers Ronstan's renowned quality in applications requiring light to moderate loads. The standard bearing design provides smooth operation without the complexity and cost of advanced bearing systems.