ball bearing block / single / lashing / max. rope ø 5 mm



  • Type:

    ball bearing

  • Number of sheaves:


  • Configuration:


  • Maximum line diameter:

    max. rope ø 5 mm

  • Application domain:

    for sailboats

  • Working load:

    125 kg (275.6 lb)

  • Breaking load:

    450 kg (992.1 lb)


The 18 mm block features stainless steel ball bearings and an integrated stainless inner race and rivet for optimal strength-to-weight. The 40 mm blocks feature composite sheaves that spin freely on Delrin® ball bearings with curved bearing races. They have no metal shackles or rivets, making them the lightest soft-attach blocks Harken has ever designed.

Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.

Other Harken products

Carbo Air Blocks