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Ronstan 30mm Ball Bearing Orbit Block, Cheek RF35151
$22.74
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PRODUCT INFOMATION
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.

FEATURES
  • Base suits curved mounting base
  • 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
MATERIALS
  • Sheave: High compression strength carbon black Acetal
  • Ball Bearings: High compression strength Acetal
  • Frame/Cheeks: Toughened, glass fibre reinforced Nylon
  • Link: UV stabilised, multi-strand impregnated SK75 Dyneema®
SPECIFICATIONS
Sheave Ø30 mm
Max. Rope Ø8 mm
Max. Cable Ø- mm
Pin Ø- mm
M.W.L.300 kg
B. L.600 kg
Weight21 g


APPLICATIONS
  • Mainsheet systems and spinnaker sheets on dinghies to 5m (16ft)
  • Halyard, vang and backstay applications on boats to 5m (16ft)
  • Control line applications on larger yachts
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