Series 30 Ball Bearing Orbit Block™, Double with Becket
Double sheave block with becket and non-swivel shackle head.
FEATURES
Lightweight.
Highest working load in its class.
Secure, versatile attachment.
Ultra low profile thru-sheave becket.
Low friction 2-stage ball bearing system provides consistent performance over the full working load range.
SP versions feature a Nylatron® sheave suitable for both rope and wire.
Specifications
Product Specifications
Max. Rope diameter (in)
5/16
M.W.L. (lb)
990*
Sheave diameter (in)
1 3/16
B.L. (lb)
1980
Weight (oz)
2
Notes:
Becket suits up to 6mm (1/4ʺ) line. For lines above 6mm (1/4") use an additional Dyneema® link (sold separately).
Load on becket not to exceed 25% of block load. Suitable for 4:1 system at rated block load.
Ball Bearing Orbit Blocks™ boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.
Lightweight Kilogram for kilogram of working load BB Orbit Blocks™ are the world’s lightest. To gain peak performance, we engineered out the heavy steel load straps, head post, shackle and cleating accessories. Through extensive research and development, we replaced virtually all metal components with high-tech polymers and fibre equivalents. Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible. Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. Other brands just link together their single blocks with a heavy steel channel across the top of the block, with unnecessary extra cheeks adding extra weight and bulk not found in Ronstan Orbit Blocks™.
Highest working load in its class The proven Ronstan 2-stage bearing system (Series 30 and larger) features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range. The sheave and bearing system is supported by a fibre-reinforced load frame, computer modelled and optimised using advanced stress analysis methods. The Dyneema® Link, used in multi-sheave blocks, is produced from high spec SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
Technical Information
Applications
Mainsheet systems and spinnaker sheets on dinghies to 5m (16ft).
Halyard, vang and backstay applications on boats to 5m (16ft).
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 
