Harken - Big Boat Blocks


Equip your boat with the top roller bearing blocks from Harken to help you withstand the high loads and heavy pulls you are going to need to keep your big boat moving forward. 

The entire line of Harken AirBlocks has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same. These strong lightweight blocks feature free rolling, high-load torlon roller bearings for a high strength-to-weight ratio. Use them for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. AirBlocks are easy to clean and service. They have few parts and no loose balls or rollers to misplace. Unlike blocks that are riveted, fasteners allow quick disassembly with a single hex wrench.

Cruising ESP blocks (Elegant Simple Products) compliment existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats. Teardrops
Use teardrop blocks for direct attachment to padeyes, mast collar posts, perforated mast collars, or in mastbase situations where leads might change.

Use footblocks to redirect lines on the deck. Footblocks with lockoffs temporarily secure sheets and are designed for port or starboard installation by flipping them over.
Use teardrop-shaped blocks for direct attachment to padeyes or mast collar posts to keep lines extremely close to the deck. Use the 6050 and 6056 on production boats with mounting posts on the mast collar. The 6057 and 6065 padeye-mounted blocks have hourglass-shaped head spacers to seat on the padeye bale.

Swivels and Fiddles
Use cruising ESP swivel and fiddle blocks in winch-driven purchases of 4:1 or less. Perfect for vangs or mainsheet systems on cruising boats from 10 m to 14 m (35 ft to 45 ft).

Harken's line of Stainless Steel Blocks reflect the traditional beauty of your yacht's classic lines. Stainless sideplates are mirror-polished for durability and unmatched esthetic. The ultralight composite bearing system rides on a heat treated stainless inner race to handle extremely high loads. Hand-polished stainless steel sideplates are the trademark of these beautiful blocks. But it’s the sheave design that gives them their strength and durability. Sheaves use a low-friction composite sleeve bearing for extreme radial loads. Ball bearings handle side loads. This proven sheave design is used on super-yachts where blocks must perform under very high, sustained loads without being excessive in size. Block details include low-profile screw adaptors and stainless-on-stainless construction for easy service. Sheaves on footblocks remove without
unbolting the block. Headposts on swivel blocks lock or swivel freely.

Harken Aluminum Megayacht Blocks The clean, crisp look of aluminum is perfect for performance-oriented yachts. Sideplates are constructed of hardcoat-annodized 6061-T6 aluminum for strength and corrosion resistance. The ultralight composite bearing system rides on heat-treated stainless steel inner race to handle extremely high loads.