Harken Midrange Block

The Harken Midrange Block Series is engineered for the demanding loads of medium and large offshore boats. Built with a robust frame and precision-machined sheaves, these blocks deliver smooth, efficient trimming and releasing under any condition. The sheaves run exclusively on high-load ball bearing systems, ensuring effortless operation even under maximum strain.FeaturesHigh-Load Performance – Rugged design ideal for medium and large offshore yachts managing heavy-duty linesBall Bearing System – Sheave runs on a high-efficiency bearing system for smooth trim and release under loadDurable Construction – Marine-grade materials resist corrosion and wear for long-term reliabilityVersatile Options – Available in standard and Hexaratchet models for superior sheet control and gripSpecificationsTypesSingle BlockTriple BlockTriple Block w/Hexaratchet & Cam cleatSheave (in)3″ ( 76 mm )3″ ( 76 mm )3″ ( 76 mm )Length (in)6 1/8″ ( 156 mm )7 3/4″ ( 197 mm )7 3/4″ ( 197 mm )Weight (oz)13 oz. ( 367 g )36 oz. ( 1020 g )49 oz. ( 1389 g )Maximum line (in)9/16″ ( 14 mm )9/16″ ( 14 mm )9/16″ ( 14 mm )Maximum working load (lb)1800 lb ( 816 kg )3800 lb ( 1724 kg )3800 lb ( 1724 kg )Breaking load (lb)5000 lb ( 2268 kg )8500 lb ( 3856 kg )8500 lb ( 3856 kg )Shackle pin (in)5/16″ ( 8 mm )5/16″ ( 8 mm )5/16″ ( 8 mm )