Ronstan RF20202 Series 20 Double Block with 2-Axis Shackle Head

The Ronstan RF20202 Series 20 Double Block delivers high-performance ball bearing operation for dinghy and small keelboat sailors who demand precise feedback and efficient line handling. This 20mm double block with 2-axis shackle head features a sophisticated two-stage bearing system that automatically adapts to varying load conditions, ensuring smooth operation whether you're making subtle trim adjustments or managing higher loads.

Innovative Two-Stage Bearing System:

The block's unique design employs acetal ball bearings for efficient operation under moderate loads, while a sliding acetal bearing running on a stainless steel race seamlessly takes over as forces increase. This intelligent system protects the ball bearings from distortion under high loads while maintaining the low friction performance critical for sensitive sail control.

Key Features:

• 20mm UV-stable acetal sheave optimized for 1/4" (6mm) line
• Dual-stage bearing system transitions smoothly between moderate and high loads
• Fiber-reinforced nylon cheeks with 316 stainless steel load straps for strength
• 2-axis shackle head with low-profile pin prevents line snagging
• Lightweight construction ideal for hand-held control lines
• Shackle pin diameter: 1/8"
• Can be used with or without the included shackle

Applications:

• Boom vangs and cunninghams
• Halyard tuning systems
• Backstay systems for dinghies and small keelboats
• Any application requiring smooth, efficient line control

Engineered for sailors who need to detect subtle wind changes and sail trim variations, the RF20202 provides the smooth operation and tactile feedback essential for optimal performance on the water.