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Ronstan S55 BB Orbit Block, Quadruple With Becket
$361.99
Ronstan RF55410 Series 55 Ball Bearing Quadruple Orbit Block With Low Profile Integrated Becket And Swivel Shackle Head
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Description
Quadruple block with becket and swivelling shackle head.
Series 55 Ball Bearing Orbit Blocks feature Ronstan’s 2-stage bearing system and are engineered to achieve the highest possible strength-to-weight ratio. They are lightweight and high performance 55mm blocks commonly used for mainsheets and spinnaker sheets on dinghies, sportsboats, and small keelboats up to 9m (30′).
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
- Holding power 20:1
- Ball bearings – High compression strength carbon black Acetal
- Stage 2 bearing – Carbon fibre reinforced, PTFE impregnated Nylon
- Frame/Cheeks – Toughened, glass fibre reinforced Nylon
- Sheave – Carbon fibre reinforced, PTFE impregnated Nylon
- Head fitting – Grade 316 stainless steel
| Type of Block | Quad |
| B.L. | 1500kg |
| M.W.L. | 750kg* |
| Max. Rope diameter | 10mm |
| Weight | 316g |
| Pin Ø | 5mm |
* Load on becket not to exceed 33% of block load.
