Blocks - Single

Stainless sideplates are mirror-polished for durability and unmatched aesthetics. The ultralight composite bearing system (ULC) rides on a heat-treated stainless steel inner race to handle extremely high loads. Note: DO NOT use Harken equipment for...

Harken 5T Aluminum V™ Block The V block delivers another breakthrough in Harken’s loop block series for Grand-Prix racers. Harken engineers have simplified the mechanics by combining the axial and thrust bearings into a single bearing set...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

Harken 3T Aluminum V™ Block - Wide The V block delivers another breakthrough in Harken’s loop block series for Grand-Prix racers. Harken engineers have simplified the mechanics by combining the axial and thrust bearings into a single...

The TTR (Titanium Roller) AirBlock surpasses all other blocks with 98% efficiency, increasing trimming speed and harnessing power other blocks lose to friction.Sheave ∅ (mm)56mmLength (mm)79mmWeight (g)127gMaximum line ∅ (mm)10mmMaximum...

Ronstan Series 150 RB Block, Single Upright Lead Part Number Max Rope Size Sheave Diameter W.L B.L Weight RON-RF158171 20mm 150mm 5500kg 1100kg 1714g

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

Harken 1.5T Aluminum V™ Block - Wide The V block delivers another breakthrough in Harken’s loop block series for Grand-Prix racers. Harken engineers have simplified the mechanics by combining the axial and thrust bearings into a single...

Harken 3T Aluminum V™ Block The V block delivers another breakthrough in Harken’s loop block series for Grand-Prix racers. Harken engineers have simplified the mechanics by combining the axial and thrust bearings into a single bearing set...

Harken 75mm Aluminium Stand-up Block   The V block delivers another breakthrough in Harken’s loop block series for Grand-Prix racers. Harken engineers have simplified the mechanics by combining the axial and thrust bearings into a single...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

Harken 100mm Aluminum Block - Swivel, Becket Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet,...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

Harken 75mm Aluminium Stand-up Block The V block delivers another breakthrough in Harken’s loop block series for Grand-Prix racers. Harken engineers have simplified the mechanics by combining the axial and thrust bearings into a single bearing set...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...

 The highest strength-to-weight ratio  Minimal friction loss, especially when working at high loads  Totally reliable and trouble free performance  Simplicity of design and construction to facilitate maintenance and...