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Quantum Racing, TP52 © Max Ranchi
V Blocks
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 of V-shaped titanium rollers. The result is a strong, light-
weight block that offers unmatched efficiency at high loads, while 
spinning freely at low loads for smooth easing in light air. 
Harken V blocks feature titanium sheaves and captive titanium 
roller bearings, and are available with either 3D-molded carbon or 
anodized aluminum sideplates. V blocks are easy to disassemble for 
inspection and maintenance.
Designed for easy maintenance, 
blocks have captive rollers and 
minimal components; quick 
disassembly with a hex wrench.
Loop or lash through sheave center 
instead of block head. Sheave carries 
primary load, allowing a smaller, 
lighter weight block.
V blocks are named for the unique 
V-shaped angled rollers that handle 
both axial and thrust loads.
The V block
What's Inside?

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