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Ronstan "Orbit" Ball Bearing Block - 20mm - w/Dyneema® single braid lashing line

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Ronstan "Orbit" Ball Bearing Block - 20mm - w/DyneemaŽ single braid lashing line

SKU: 502517

$69.91 / EA

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Orbit™ Ball Bearing Block - 20mm

The Ronstan BB Orbit Block features a unique lashing head. Building on the latest trends in grand prix dinghy and ocean racing, it replaces the steel head post and shackle arrangement of traditional blocks.

Note: In order to meet breaking loads, this block must be lashed with the lashing, strop or link passing through the hub (see diagram in the usage instructions)

  • Suits up to 4mm (5/32") lashing
  • Supplied with 750mm (30") x 2mm (3/32") diameter, Dyneema® single braid lashing line


  • Leech / control lines
  • Cunninghams
  • Ideal for higher load applications


  • Sheave: high compression strength carbon black Acetal
  • Frame:/Cheeks: Toughened, glass fibre reinforced Nylon
  • Load straps and ball bearings: Grade 316 stainless steel
  • HHL sheave and bearing race: Grade 2205 stainless steel, Balls: Grade 316
  • Frame/Cheeks: Toughened, glass fibre

Mfg No. RF25109HL

Sheave Diameter 3/4" (20mm)

Max Line Diameter 1/4" (6mm)

Max Working Load 660 lbs. (300kg)

Breaking Load 1980 lbs. (900kg)

Weight 0.5 oz. (14g)

Note: Click here for Orbit Block Usage Instructions.

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