We Ship Worldwide! | FREE SHIPPING! for US Continental orders over $145. Click for details.

Ronstan Series 55 RT Orbit Block, Cheek Anti-Clockwise Rotatio (RF56151A)

SKU: RONRF56151A  |  Manuf. Code: RF56151A
$84.95 USD
Price Match Guarantee Price Match Guarantee
Our Best Price Guarantee
  1. We Price Match against authorized dealers only, based on the total order cost (product + shipping).
  2. No auction sites
  3. No unauthorized sellers
  4. Item must be identical, new, and in stock
Found it cheaper? Chat with us to request a Price Match.
Chat with our Tech Team Questions? Chat with our Tech Team
Backed by MAURIPRO Support Backed by MAURIPRO Support.
Simple 30-Day Returns Simple 30-Day Returns.
Simple 30-Day Returns

We offer returns within 30 days of delivery for your peace of mind.

  • 0–15 days: Free returns or exchanges
  • 16–30 days: Returns accepted with a 20% restocking fee
  • Returns after 30 days are not accepted.
  • Request a Return Authorization (RA#) prior to shipping.
  • Return shipping is the customer’s responsibility.
International Shipping — Duties & VAT Not Included
International Shipping — How It Works

Orders ship from our US warehouse worldwide. Prices shown are in USD and do not include import duties, VAT, GST, customs fees, or any taxes charged by your country on arrival.

These charges are set by your local customs authority and are the buyer's responsibility, payable to the carrier (DHL, FedEx, UPS, or your national postal service) at the time of delivery.

Rates vary by country and product category. For an estimate, check your country's customs authority website or contact us before ordering.

Questions? Chat with our Tech Team.

DESCRIPTION

The Ronstan Series 55 RT Orbit Block, Cheek Anti-Clockwise Rotation #RF56151A is a versatile block perfect for sailors who value both convenience and performance. With its unique automatic ratchet and manual engagement modes, this block offers unmatched holding power and adaptability for various sailing conditions. It's designed for those who appreciate effortless ease and reliability on the water.

Crafted with precision, the block features an anodised aluminium sheave and high compression strength carbon black Acetal ball bearings for durability. The frame and cheeks are made from toughened glass fibre reinforced nylon, while the rope link uses UV-stabilised, multi-strand impregnated SK75 Dyneema®. Its innovative design reduces rope wear and enhances performance, making it an excellent choice for competitive and recreational sailing.

Usage

Ideal for use in mainsheet systems and for gybing asymmetric spinnakers, providing smooth and controlled sheet movement in various sailing scenarios.

Our Part #RONRF56151A | Mfr. Part #RF56151A

FEATURES

  • Automatic and manual ratchet engagement modes
  • Superior holding power with a 21:1 ratio
  • 12 gripping faces for enhanced line resistance
  • Up to 20:1 holding power.
  • Smooth easing of sheets.
  • High performance cleatin.g
  • Automatic and manual ratchet block.

TECHNICAL INFORMATION

Sheave Diameter: 55 mm / 2 5/32 in
Max. Rope Diameter: 10 mm / 3/8 in
Max. Working Load: 250 kg / 550 lb
Breaking Load: 700 kg / 1540 lb
Weight: 76 g / 2.7 oz