NEW! 2020 Ronstan Sailboat Hardware Catalogue - VIEW CATALOGUE

Orbit Block™


Series 20 Ball Bearing



  • Integrated stainless steel hub to accept lashing attachment and through-sheave becket
  • Suits up to 4mm (5/32”) lashing
  • Includes 750 mm (30") x 1.7mm (1/16") diam lashing cord

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The incredible Series 20 Orbit Block™ is capable of loads up to 250kg (550lb) while weighing a mere 9 grams. It’s so light that it needs to be lashed down!

Series 20 BB Orbit Block™ Lashing Head User Instructions


N.B. Block must be lashed through hub. M.W.L. & B.L. are dependent on the strength of lashing. Knots, splices, stitching will generally have a lower B.L. than the line itself.

Sheave Ř20 mm
Max. Rope Ř6 mm
Max. Cable Ř mm
Pin Ř- mm
M.W.L.250 kg
B. L.550 kg
Weight9 g
  • Leech / control lines
  • Cunninghams
  • Sheave: high compression strength carbon black Acetal
  • Frame:/Cheeks: Toughened, glass fibre reinforced Nylon
  • Load straps and ball bearings: Grade 316 stainless steel