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construction
A Rocna anchor's advantage is in its design – and construction. With a design philosophy of maximum durability and reliability, in addition to ultimate performance, Rocna makes no compromises in any area.
The Rocna design is type-approved, not just by its designer, the highly experienced professional boat-builder and boater Peter Smith, but also by RINA (Registro Italiano Navale), an internationally recognised leader in certification and assessment of conformity responsible for ensuring the 'suitability for purpose' of critical equipment on yachts and ships worldwide.
RINA recently awarded Rocna anchors with Super High Holding Power (SHHP) certification. In extensive seabed testing, Rocna anchors exhibited the highest holding power of any anchor RINA has tested.
(For more on RINA, check out the Rocna Knowledge Base article on certification and classification – click here).
Each Rocna begins life in Hold Fast's dedicated, ISO 9001-accredited Chinese facility. Hold Fast produce Rocna anchors to stringent specifications and standards, using the highest quality materials. Improvements to the casting process and changes to the composition of steel used in the anchor blade, both pioneered in Hold Fast's new Chinese factory, have resulted in a 200% gain in yield strength, reflected in SHHP Type Approval.
A Rocna consists of three primary components, all formed from modern, high quality steel alloys:
The fluke (also referred to as the blade) is solid steel. A folded shape is used (rather than rolled) to form its essential and unique concave shape, and features a sharp, aggressive toe. The fold reinforces the fluke all the way to the end of the toe for maximum resistance to bending. The steel used in the blade now closely matches the shank material for the first time. The roll-bar is pipe – hollow, so weight may be better allocated elsewhere. The shank is precision-cut from top-grade high-tensile steel plate, which is extremely resistant to twisting and bending. Changes to the steel composition used by the new Chinese factory result in significantly improved 'elongation' for better anchor wear and durability.
A team of trained specialists and certified welders assemble the Rocna's three separate elements, fusing them into a massively strong and rigid single-piece anchor. In testing, the welds have proven the strongest part of the anchor. Edges and details are hand-worked for a flawless finish.
Finished steel anchors then undergo a rigorous nine-step anti-corrosion process, culminating in hot-dip galvanising. This provides an outer coating of durable pure zinc and a tenacious inner layer of zinc-steel alloy. Rocna stainless steel anchors are hand-polished until they shine.
The Rocna design requires no inefficient dedicated tip weight – so no expensive complications melting out and remoulding lead-tip ballast should you need to re-galvanise the anchor at some point.
For more, check out the Rocna Knowledge Base article on construction and anchor materials (click here).
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