Ronstan 100mm Stand-Up Core Block

Ronstan 100mm Stand-Up Core Block
Item# RF104140
Regular Price: $352.88
Our Price: $299.95

Product Description

Ronstan 100mm Stand-Up Core Block

Full articulated stand-up

Stand-up models have a linkage that provides full rotation and articulation. A high strength precision cast padeye minimized the footprint and a dedicated rubber boot ensure the block is held upright when not loaded.


  • High dynamic and static load capacity

  • High load bearing system

  • Ball bearings to counteract side thrust loads

  • Class leading performance and sleek, contemporary styling

  • Durable aluminum alloy cheek plates

  • Central hub hole can be used as a becket take-off or tie-up point

  • Also available in Series 45, 60 & 75

  • Swiveling head post for full 3-axis articulation

  • Strong precision cast padeye base

  • Resilient rubber stand-up boot prevents clatter & block falling down when not loaded

  • Mount with 4 x 8mm (5/16") fasteners (not supplied)


  • Sheave - 4 in. (100mm)

  • Max. Rope - 3/4 in. (18mm)

  • Max. Cable - in (mm)

  • Pin - in. (mm)

  • M.W.L. - 6600 lb. (3000 kg)

  • B. L. - 13200 lb. (6000 kg)

  • Weight - 40.2 oz. (1138 g)


  • Ideal for mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats to 16m (53ft).

  • General applications on larger yachts.


  • Bearings: High compression strength, self-lubricating acetal

  • Head post: Grade 2205 stainless steel

  • Shackles: Grade 17-4PH stainless steel

  • Padeye: Grade 15-5PH stainless steel

  • Other fixtures: Grade 316 stainless steel