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Ronstan Series 55 BB Orbit Block, Double Becket Swivel

SKU: 88900 - UPC: 9316800442645 - MPN: RF55210
$96.90 $114.00 ( / )

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Series 55 BB Orbit Block, Double Becket SwivelLightweightKilogram for a 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 minimizes the mass of the inactive return race...
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Ronstan Series 55 BB Orbit Block, Double Becket Swivel Product Description

Series 55 BB Orbit Block, Double Becket Swivel

Lightweight

Kilogram for a 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 minimizes 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 have a through-sheave becket arrangement. The result? The lowest weight is 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 maximizes 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 are supported by a fiber-reinforced load frame. The design was computer modeled to be stress optimized. The Dyneema® Link is produced from FSE Robline SK75 fiber, which is 10 times stronger and lighter than steel and provides the final connection from the block to the load point.

Features:

  • Ultra Lightweight
  • Low friction 2-stage Orbital ball bearing system
  • Highest working load in its class
  • Low profile and compact
  • High performance cleating
  • Swivel shackle head for unlimited block rotation
  • Stainless steel shackle head and compatibility with sharp fixing points
  • Ultra low profile integrated beckets




Frequently Asked Questions (FAQ) About Ronstan Series 55 BB Orbit Block, Double Becket Swivel

Who is the Ronstan?

Who is the Ronstan?

The sailboat hardware market and the architectural rigging market are worlds apart, but in Australia they're both dominated by one powerhouse player. Ronstan's end-to-end design, manufacture and distribution operation has grown to become the only serious competitor. Internationally, Ronstan is one of the top three sailboat hardware brands in the world, instantly recognized and respected in 45 countries.


Save $17 when you buy the Ronstan Series 55 BB Orbit Block, Double Becket Swivel for only $96 from NVN Marine! Same day shipping before 3pm.

Ronstan Series 55 BB Orbit Block, Double Becket Swivel Technical Specifications

Type: 

Sailing | Blocks

Vendor: 

Ronstan

Weight: 

0.35 lb

Ronstan Series 55 BB Orbit Block, Double Becket Swivel User Reviews

Ronstan Series 55 BB Orbit Block, Double Becket Swivel Shipping & Return

Shipping Weight: 

0.35 lb

Box Sizes: 

2.00 (h) x 3.00 (w) x 5.00 (l)

Cubic Feet: 

30.0

Returnable: 

Yes

USPS First Class: 

Yes

For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.

Ronstan Series 55 BB Orbit Block, Double Becket Swivel

$96.90 $114.00 ( / )