CNC Onsite lands precision milling work at CS WIND Offshore

CS WIND Offshore has started using a custom automated milling machine from CNC Onsite at its Aalborg, Denmark facility to cut high-precision cable penetrations in offshore wind transition pieces. The setup replaces manual cutting, improves waterproof sealing, and supports large turbine components built for harsh sea conditions.

Why it matters: - Offshore wind transition pieces need highly precise cable openings to keep electrical systems watertight in corrosive marine environments. - CNC Onsite’s automated milling system is designed to reduce manual cutting, improve consistency and avoid surface damage on large steel structures. - The work supports cables used for turbine lighting and platform cranes, both of which are essential for offshore operations.

What happened: - CS WIND Offshore began operating a custom-built automated milling machine from CNC Onsite at its Aalborg, Denmark facility. - The machine is being used to create high-precision cable penetrations in transition pieces for offshore wind farms. - The same setup also mills pressure relief holes in the transition pieces. - The machine is magnet-mounted and built as a 4-axis gantry system.

The details: - The machine replaces manual flame-cutting and grinding with CNC-controlled milling. - Each transition piece has six cable holes that require clean edges for reliable sealing. - Each transition piece also has 12 pressure relief holes designed to reduce pressure and limit structural warping in rough seas. - CS WIND Offshore needed a 1-millimeter tolerance to eliminate micro-gaps around internal electrical routing. - The project exceeded that target and achieved 0.3-millimeter tolerance through a dust-free process. - The cables routed through the penetrations power platform cranes and signal lights that illuminate identification numbers on wind turbines. - The machine measures 3.6 meters long, 2.3 meters wide and 2 meters high, with an approximate weight of 4.8 metric tons. - The internal machining envelope is 2.6 meters on the X-axis, 0.6 meters on the Y-axis and 0.6 meters on the Z-axis. - The milling head can tilt from 28 degrees to 90 degrees to match angled cable routing. - The scope of work used penetration holes measuring 180 millimeters by 350 millimeters. - The machine can handle openings from 50-millimeter utility holes to 2,575-millimeter-by-550-millimeter structural oval penetrations. - The machine uses electromagnetic fastening to lock onto the curved transition piece without invasive clamping or visible marks on the steel surface. - The system’s spindle uses an ISO 50 interface with a Capto SI50-QC-C6-105 adapter. - The spindle supports a maximum milling tool diameter of 15 centimeters and a maximum drilling tool diameter of 11 centimeters. - The machine runs on a standard industrial 400-volt three-phase power connection at 32 amperes. - An external HT10 handheld remote control unit manages the system and supports safe distance operation.

Between the lines: - The project shows how large offshore components are increasingly being machined in place instead of moved to fixed equipment. - CNC Onsite’s mobile approach is meant to solve the challenge of working on steel parts that are too large and heavy for standard machines. - The dust-free process and non-marking magnetic attachment reduce rework and help keep manufacturing surfaces intact. - The install also reflects tighter technical standards across offshore energy manufacturing, where precision and reliability carry direct operational consequences.

What's next: - CNC Onsite says its mobile gantry system is designed for other precision machining tasks on wind turbine and offshore foundation components. - The company also positions the machine for use across onshore and offshore wind projects, including standard machining and specialized repair work. - CS WIND Offshore is expected to continue using the automated setup for transition-piece processing at its Denmark site.

The bottom line: - The deal gives CS WIND Offshore a faster, cleaner way to produce watertight cable penetrations for offshore wind infrastructure while showing how mobile CNC machining is moving into heavier industrial work. - CNC Onsite is headquartered in Vejle, Denmark, was founded in 2012 and holds ISO 9001, ISO 14001 and ISO 45001 certifications. - More information