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- Ultra Lightweight
- Low friction 2-stage Orbital ball bearing system
- Highest working load in its class
- Low profile and compact
- High performance cleating
Lightweight
Kilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.
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. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.
Highest working load in its class
The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.
The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. User Instructions
For comprehensive details including user instructions, and for spare part tables, and fastener sizes view in various languages using the following links BB & RT OrbitBlock™ User Instructions (English), BB & RT OrbitBlock™ User Instructions (French), BB & RT OrbitBlock™ User Instructions (German)
Applications
- Mainsheet systems on spinnaker sheet on dinghies to 5m (16ft)
- Spinnaker sheets on dinghies, sportsboats and small keel boats to 5m (16ft)
- Halyard, vang and backstay applications on boats to 8m (26ft)
- Control line applications on larger yachts
Materials
- Ball Bearings - High compression stregnth carbon black Acetal.
- Stage 2 Bearing - Glass fibre reinforced, MoS2 impregnated Nylon
- Frame/Cheeks - Toughened, glass fibre reinforced Nylon
- Sheave - Carbon fibre reinforced, PTFE impregnated Nylon
Product Specifications
| Sheave Ø | 40 mm |
|---|---|
| Max. Rope Ø | 9 mm |
| Max. Cable Ø | mm |
| Pin Ø | 4 mm |
| M.W.L. | 325 kg |
| B. L. | 650 kg |
| Weight | 105 g |
* Total block load. Becket MWL 125kg, BL 250kg (550lb). Suitable for 3:1 system at rated block load.
After ordering online, you will receive an automated email confirmation containing your order details. Your order will then 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.
Most orders are shipped within 2 - 5 Days
Shipping rates
Orders delivered to Australian Post Codes attract an $18.00 Flat Rate Shipping Charge* This excludes Bulky or Dangerous Goods
For Bulky Goods, Dangerous Goods and Remote areas.
If the cost to send is vastly different to our standard delivery costs, someone from our team will contact you prior to dispatch to arrange further payment or to issue a refund if you are not happy with the additional charges.
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 don't hesitate to get in touch by clicking the support button on bottom right of the page.
$18 Flat Rate Shipping
Excludes Bulky/Dangerous Goods
Satisfied or Refunded
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