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Harken TTR Airblocks

Harken TTR Airblocks

The lowest friction block Harken has produced. Harken's Titanium Roller Airblock's (TTR) have a 98% efficiency rating, making it easier for trimmers to be more effective. High load bearing block that is incredibly lightweight and was developed to withstand the demands of the America's Cup.

Soft Loop attachments provide the block's primary load-bearing strength, allowing the TTR to be attached in a variety of locations. Roller bearings are made of Titanium which handles the bearing load, while the snap-fit Torlon® ball barings carry the side loads. Outer and inner races are made of titanium for lightweight strength. Comes apart with Allen wrench for maintenance.

Part # Description Working Load Sheave Diameter Max Line Weight
lbs kg in mm in mm oz g
HC8491 5.0 TTR Airblock 11025 5000 3 75 1/2 12 8.78 248
HC8580 5.0 Wide TTR Airblock 11025 5000 3 75 2-1/2 2 x 12 10.27 291
HC8575 6.5 TTR Airblock 14333 6500 4 100 5/8 16 17.47 495
HC8462 8.0 TTR Airblock 17641 8000 5 125 --- --- 29.45 834


HC8491 75mm TTR Airblock - 5 Ton Price: $1,244.73 HC8580 75mm Wide TTR Airblock - 5 Ton Price: $1,921.20

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