In the Carbo blocks 29mm section you will find products from Harken's smallest Carbo block series: single block (H340), block with hunsvot (H341), double block (H342) and double block with hunsvot (H343), triple block (H344) and triple block with hunsvot (H345), as well as fixed block (H348) and standing block (H349) for fixed installations.
What are 29mm Carbo blocks suitable for?
The 29 mm size range is the smallest size in Harken's Carbo series and is particularly suitable for controlling lightweight control lines, such as sail corner belts, cabin cover rigging or the rigging of small dinghies and dinghies, where the rope thickness and load are moderate compared to larger sailboats.
The carbon fiber-framed Carbo block is significantly lighter than a traditional aluminum or brass-framed block in the same size class, which is a significant advantage, especially in racing, where every extra gram in the rigging affects the performance of the boat. The lighter block also responds faster to line movements, which improves control precision.
The choice of single, double and triple block depends on the complexity of the rope system – a single block is used for a simple change of direction, while double and triple blocks are needed for more complex hoist systems where multiple ropes run from the same anchor point in different directions.
The model with a Hunsvot allows the block to be attached to a movable point, for example a cover fitting or a pedestal, while the fixed block is more suitable for a fixed mounting point where the block does not need to rotate during use. The standing block (H349) is specially designed for applications where the block must remain completely stationary throughout use.
When choosing a block, make sure that its load capacity is sufficient for the actual load of the application - although 29 mm is the smallest Carbo size, it can still withstand considerable loads when used correctly, but for larger boats and heavier ropes, it is worth choosing a larger size.
Harken's H-numbering (for example, H340–H349) helps you quickly identify the exact model, which is useful when ordering spare parts or comparing different block types – record the model numbers used by your boat for future maintenance and replenishment purchases.
The block's bearings are designed to withstand repeated use for years without maintenance, but salt and sand buildup on the bearing surfaces can slow down rotation over time – regular flushing with fresh water at the end of the season will keep the block running smoothly.
Always compare the price-quality ratio between different size categories before making a final choice, and if necessary, ask a salesperson specializing in rigging for advice.