Purchase Ronstan Ball Bearing Double Blocks online here. Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required. Becket pin is removeable so line can be spliced prior to fitting and is ingeniously locked into position without the use of a clevis pin, split ring or tools
Big savings when you buy in bulk. Suitable for balustrading, rigging, and other purposes.
Applications
Mainsheet
Halyard
Vang
Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs
On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.
We can ship to:
Melbourne – Sydney – Brisbane – Perth – Adelaide – Hobart