Harken 4.00 (102 mm) Narrow Hi-Load Halyard Sheave

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Narrow high-load sheaves in mastheads improve sail handling, speed sail changes, and allow the use of smaller, lighter halyard winches. Sheaves combine sideload-carrying balls with a PTFE composite bushing for radial loads.

Part Number: HK692


Sheave Ø (mm) 102 mm
Sheave Ø (in) 4 in
Width (mm) 19 mm
Width (in) 3/4 in
Weight (g) 227 g
Weight (oz) 8 oz
Center pin Ø (mm) 12.7 mm
Center pin Ø (in) 1/2 in 
Maximum line Ø (mm) 12 mm
Maximum line Ø (in) 7/16 in
Maximum wire Ø (mm) 8 mm
Maximum wire Ø (in) 5/16 in
Maximum working load (kg) 3742 kg
Maximum working load (lb) 8250 lb
Breaking load (kg) 7484 kg
Breaking load (lb) 16500 lb
Footnote Breaking load based on use of solid 304 stainless shafts.


Need help to design your Harken system - take a look here for the Harken System Guides and Drawings

Or perhaps you need some other information (load calculators, block selectors, service instructions or manuals)?   Take a look here for all the official Harken Support Information