Ronstan Series 20 Stainless Steel Single Ball Bearing Exit Sheave Box

Normally Available in 2-3 Days

Ronstan series 20 exit block for masts and through deck applications. 2x 4mm fixing holes 48mm apart

Ronstan 20mm exit block with cover plate

Precision moulded Acetal sheaves running on stainless steel ball bearings provide high performance & low friction. They are typically used as lead blocks or to create powerful, efficient purchase systems.

Can be fitted with a shackle in either of two planes to allow correct alignment of the block. RORF1850S required to go through 3.5mm holes in loop head


  • Dinghy control lines
  • Dinghy vangs
  • Cunninghams
  • Traveller controls


  • Stainless steel ball bearings
  • UV stabilised Acetal sheave
  • Grade 316 stainless body and cover


  • Low friction
  • High static and dynamic load capacity
  • Lightweight
  • 2x 4mm fixing holes
  • Fixing hole centres 48mm apart
More Information
SKU RO-RF20711
Weight 22g
Attachment Method Surface Mount, Through Deck
Bearing Type Ball Bearing
Block Type Single
Sheave Diameter (mm) 20.00
Max Rope Width (mm) 6.00
Max Working Load (kg) 275
Breaking Load (kg) 1000
Length (mm) 59
Country of Origin AU
Frequently Bought Together
Total price