Ronstan Series 40 BB Single Orbit Block - Dyneema Link Head

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Product Description

Ronstan Series 40 Ball Bearing Single Orbit Block, Dyneema Link Head - RF45101

  • Ultra Lightweight
  • Low friction 2-stage Orbital ball bearing system
  • Highest working load in its class
  • Low profile and compact
  • High performance cleating
  • Easily fitted and securely retained Dyneema Link head


  • Mainsheet systems on spinnaker sheet on dinghies to 5m (16ft)
  • Spinnaker sheets on dinghies, sportsboats and small keel boats to 5m (16ft)
  • Halyard, vang and backstay applications on boats to 8m (26ft)
  • Control line applications on larger yachts


  • Ball BearingsHigh compression stregnth carbon black Acetal.
  • Stage 2 BearingGlass fibre reinforced, MoS2 impregnated Nylon
  • Frame / CheeksToughened, glass fibre reinforced Nylon
  • SheaveCarbon fibre reinforced, PTFE impregnated Nylon
  • Rope/LinkUV stabilised, multi-strand impregnated SK75 Dyneema


  • Sheave Ø: 40 mm
  • Max. Rope Ø: 9 mm
  • Max. Cable Ø: - mm
  • Pin Ø: - mm
  • MWL: 325 kg
  • BL: 700 kg
  • Weight: 33 g
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