Now you can enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan is the only company that offers a ratchet block with both auto and manual engagement modes*. In the auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. This is the preferred mainsheet set-up for may top sailors. Try the block in both modes and see which you prefer - you really can't go wrong. * Selected Series 55 models.
Awesome ratchet block holding power
Quite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated CNC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. Its holding power is up to 20:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.
Technical Information
Applications
Dinghy mainsheet systems.
Spinnaker sheets on dinghies – especially modern asymmetric classes.
Spinnaker sheets on sportsboats and small keelboats (lateral lead blocks).
Control line applications on larger yachts.
Materials
Ratchet Sheave: Anodised Aluminium.
Ball Bearings: High compression strength carbon black Acetal.
We would love to keep in touch with you! Sign up to our quarterly newsletter and receive news, tips, and updates right in your inbox.
Newsletter
Our use of cookies
We use necessary cookies to make our site work. We'd also like to set optional cookies to help us improve it.
We won't set optional cookies unless you enable them.
Using this tool will set a cookie on your device to remember your preferences.
Necessary
Necessary cookies enable core functionality such as security, network management, and accessibility. You may disable these by changing your browser settings, but this may affect how the website functions.
Name
Description
PHPSESSID
Preserves the visitor's session state across page requests.
form_key
Protects visitor's data from Cross-Site Request Forgery Attacks.
guest-view
Stores the Order ID that guest shoppers use to retrieve their order status. Used in “Orders and Returns” widgets.
login_redirect
Preserves the destination page the customer was loading before being directed to log in.
mage-banners-cache-storage
Stores banner content locally to improve performance.
mage-cache-sessid
The value of this cookie triggers the cleanup of local cache storage.
mage-cache-storage
Local storage of visitor-specific content that enables ecommerce functions.
mage-cache-storage-section-invalidation
Forces local storage of specific content sections that should be invalidated.
mage-messages
Tracks error messages and other notifications that are shown to the user, such as the cookie consent message, and various error messages. The message is deleted from the cookie after it is shown to the shopper.
private_content_version
Appends a random, unique number and time to pages with customer content to prevent them from being cached on the server.
section_data_ids
Stores customer-specific information related to shopper-initiated actions such as display wish list, checkout information, etc.
user_allowed_save_cookie, cookie_consent
Stores the user's cookie consent state for the current domain.
X-Magento-Vary
Configuration setting that improves performance when using Varnish static content caching.
Preferences
Preference cookies are used to store settings and information that changes the website look and functionality.
Name
Description
store
Remembers the user's selected language version of a website.
Marketing
Marketing cookies help us provide our visitors with relevant content, browsing history, and product recommendations.
Name
Description
product_data_storage
Stores configuration for product data related to Recently Viewed / Compared Products.
recently_compared_product
Stores product IDs of recently compared products.
recently_compared_product_previous
Stores product IDs of previously compared products for easy navigation.
recently_viewed_product
Stores product IDs of recently viewed products for easy navigation.
recently_viewed_product_previous
Stores product IDs of recently previously viewed products for easy navigation.
_fbp
This cookie is installed by Facebook to store and track visits across websites.
Analytics
Analytics cookies help us understand how our visitors interact with the website. It helps us understand the number of visitors, where the visitors are coming from, and the pages they navigate. The cookies collect this data and are reported anonymously.
Name
Description
add_to_cart, remove_from_cart
Used by Google Tag Manager. Captures the product SKU, name, price and quantity added or removed from the cart, and makes the information available for future integration by third-party scripts.
dc_gtm_*
Throttles request rate when Google Analytics is deployed with Google Tag Manager.
_ga, _gat, _gid, _ga_*, _gat_*
This cookie is installed by Google Analytics. They are used to collect information about how visitors use our website. We use the information to compile reports and to help us improve the website. The cookies collect information in a way that does not directly identify anyone.
Ball Bearing 
