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Lewmar 40mm Synchro Control Block 10mm - Stand Up

Lewmar 40mm Synchro Control Block 10mm - Stand Up


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Lewmar 40mm Synchro Control Block 10mm - Stand Up.  Ref17:  AF-L29901420 

Ideal for use with hand-held loads, Lewmar’s Control Blocks feature lightweight, performance loadbearing capacity. MRT (Metal Replacement Technology) and a stainless steel central race and balls provide a weight advantage, while Long Fibre Technology offers exceptional strength and durability. The open design allows sand and salt to be flushed out easily, keeping maintenance simple.


  • Lightweight
  • Very High Strength
  • Impact Resistant
  • Reduced Friction
  • Easy Maintenance
  • Optimised for hand control


  • Ball bearing blocks are typically used for medium and dynamic loads in:
  • Control line applications
  • Mainsheets for dinghies and keelboats
  • Spinnaker sheets, barber haulers
  • Genoa sheets
  • Dinghy applications
  • Sheave Dia:  40mm - Max Line Dia 10mm
  • Working Load Limit:  240kg (528lbs)
  • Weight:  54g (1.9oz)
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