Ronstan Series 30 Ball Bearing Orbit Block - Cheek

Experience unparalleled performance on the water with the Series 30 Ball Bearing Orbit Block™ - Cheek. Engineered for marine enthusiasts, this orbit block offers the highest strength-to-weight ratio in its class, ensuring reliable and efficient operation for all your sailing and boating needs. Crafted from all-composite reinforced polymer materials, it provides multiple attachment options and reduces friction through its precision-engineered ball bearing system. Whether you're managing mainsheets, spinnaker sheets, halyards, vangs, or backstays, this orbit block delivers exceptional durability and lightweight performance.

Features

• Lightweight: Designed to minimize weight without compromising strength.
• Highest Working Load: Capable of handling the maximum load in its category.
• Secure and Versatile Attachment: Multiple attachment points for flexible installation.
• Low Profile and Compact: Streamlined design for easy integration into various setups.

Applications

• Mainsheet and Spinnaker Sheets: Ideal for dinghies up to 5 meters (16 feet).
• Halyard, Vang, and Backstay: Suitable for boats up to 5 meters (16 feet).
• Control Lines: Perfect for larger yachts requiring robust line management.

Materials

• Sheave: High compression strength carbon black Acetal for superior durability.
• Ball Bearings: High compression strength Acetal ensures smooth operation.
• Frame/Cheeks: Toughened, glass fiber reinforced Nylon for enhanced strength.
• Link: UV stabilized, multi-strand impregnated SK75 Dyneema® for maximum resilience.

Specifications

Sheave Ø	30mm (1-3/16")
Max. Rope Ø	8mm (5/16")
M.W.L.	300kg (660lbs)
B.L.	600kg (1,320lbs)
Weight	21g (0.7oz)

Download the Quick Guide (PDF)

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.