Harken 4.5 in. Wide Sheave

Harken 4.5 in. Wide Sheave

Product Details


    Big Boat sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Made of Hardkote-anodized, Teflon® impregnated 6061-T6 aluminum, sheaves feature Torlon® rollers to carry high radial loads and carbon-black Delrin® balls to support sideloads and provide UV protection. Select sheaves based on load-carrying capability.

    Installation requires clamping or securing inner race.

    Use for:
    Mainsheets, Spinnaker sheets, Afterguy/foreguy and Footblocks.

    Part Number: 657

    Tech Info

    Imperial Metric
    Sheave Dia. 4 1/2" 114 mm
    Width 1 5/8" 41 mm
    Weight 25 oz 709 gr
    Center Pin Dia. 3/4" 19.10 mm
    Fasteners 3/8" 10 mm
    Fastener Circle 1 3/8" 35 mm
    Max Line Dia. 7/8" 18 mm
    Maximum Working Load 14850 lbs 6736 kg
    Breaking Load 29700 lbs 13472 kg