Ronstan

Series 75 Orbit Block, Double

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Ronstan

Series 75 Orbit Block, Double

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Features
- Exceptionally high strength-to-weight ratio.
- Captive ball bearings for side thrust loads require no side retainer plates, reducing weight and providing a wider bearing surface for the Torlon needle rollers.
- Side cheeks incorporating head structure and hub are precision machined as a single part from solid alloy, leaving material only where it contributes to the load carrying capacity of the block and eliminating the need for additional fasteners.
- Head posts of swivel blocks can be locked at 0∞ or 90∞.
- Removable becket pin allows lines to be spliced prior to fitting.
- Halyard blocks have a removable pin for attachment to deck padeyes or the mast collar, providing a low lead aft to organisers or winches.
- Shape and edge radii of central hole in hub are compatible with fail-safe strops.
- Stand-up blocks have rubber support bases that relax to 90∞ (typically for foreguy/afterguy) or 60∞ (for halyard and other lead block applications).
- Runner blocks have a unique cheek shape and guide rollers to help keep the line engaged with the sheave.
- Foot block base plate and hub section is machined in one piece from a single block of alloy, for maximum integrity, with mounting bolts seated within the base plate and hub to minimise bending loads and prevent racking over of the block.
- Foot block cover plate can be removed for service access without removing the bolts that secure the block to the deck.
- Strop blocks suit direct attachment to Dyneema or similarstrops for maximum weight saving and flexibility.
- Spreacher blocks can accomodate a second spinnaker sheet for sail changes or an outboard genoa sheet for reaching.

Applications
- Primary mainsheet, halyard and spinnaker systems on boats to 14m (46ft).
- Secondary mainsheet, vang blocks on boats to 15m (50ft).
- Permanent and running backstay systems on boats to 12m (40ft).
- General control line and lead block applications on larger yachts.

Construction
- Fully machined Alloy cheek plates.
- Alloy sheaves with captive ball races.
- Torlon needle rollers.
- Carbon black Acetal ball bearings
- Grade 17-4PH stainless steel head post and forged shackle.


Sheave Diam: 75mm
Max Rope: 14mm
M.W.L: 3250kg
B.L.: 6500kg
Weight: 575g

After ordering online, you will receive an email confirmation containing your order details from sales@arnoldsboatshop.com.au. Your order will be confirmed within a few minutes of placing your order.

It is our policy to ensure we deliver to our customers in a timely manner. In order to achieve this we use a range of freight companies depending on the size and weight of your order. In some instances we may use a number of carriers to get your products to you. For example chain may come by road, some electronic equipment by air.

Orders delivered to Australian Post Codes under $499 attract an $18.00 shipping charge. Orders of $499 or more ship free.

International orders will be charged at $0.00 initially and our staff will be in contact with a shipping quote. If the quote is not accepted the customer reserves the right to cancel their order and be refunded in full.

Should you have any queries or concerns about shipping, please contact us and we will have someone get back to you.