Ronstan Series 30 Orbit Cheek Block, 30mm Sheave, 300kg MWL

Elevate your sailing performance with the Ronstan Series 30 Ball Bearing Orbit Block™ - Cheek. Engineered for superior strength and efficiency, this block boasts the highest strength-to-weight ratio in its class, achieved through advanced all-composite reinforced polymer materials. Its precision design incorporates an optimum number of high-compression acetal ball bearings, ensuring minimum friction and ultra-smooth operation across the entire working load range. Designed for durability and performance, it's a no-compromise solution for demanding sailing applications. Upgrade your rigging today for a competitive edge.

Key Benefits & Specifications:

• Sheave Diameter: 30mm (1-3/16") – Optimized for precise rope control and compact integration.
• Maximum Rope Diameter: 8mm (5/16") – Accommodates common control lines for versatile use across various systems.
• Maximum Working Load (MWL): 300kg (660lbs) – Handles significant loads reliably, ensuring robust performance in demanding conditions.
• Breaking Load (B.L.): 600kg (1323lbs) – Provides a substantial safety margin for extreme situations, enhancing reliability.
• Lightweight Construction: Weighs only 21g (0.7oz) – Minimizes added weight to optimize boat speed and handling.
• Frame/Cheeks: Made from toughened, glass fiber reinforced Nylon – Ensures exceptional durability, impact resistance, and a long service life.
• Sheave Material: High compression strength carbon black Acetal – Delivers smooth, low-friction operation even under high compression.
• Ball Bearings: High compression strength Acetal – Guarantees minimal friction and consistent performance across the full working load range.
• Attachment Link: UV stabilized, multi-strand impregnated SK75 Dyneema® – Offers superior strength, longevity, and resistance to environmental degradation.
• Mounting: Requires 2 x 4mm (5/32") flat head fasteners – Ensures secure and stable deck mounting, with a base that suits curved surfaces.

Recommended Applications:

• Mainsheet systems and spinnaker sheets on dinghies up to 5M (16').
• Halyard, vang, and backstay applications on boats up to 5M (16').
• Control line applications on larger yachts for creating efficient turning points on deck.