CNC Onsite, a Vejle-based specialist in mobile precision machining for wind turbines, is opening its first foreign subsidiary in Houston, Texas. The company said on 16 September that CNC Onsite Inc. has already completed its first repair jobs and will offer uptower yaw ring, shaft and blade root repairs to wind farm operators across the United States without the use of heavy cranes.
The pitch rests on the cost of crane logistics. According to CNC Onsite’s own market research, mobilising a heavy-lift crane for a single repair, including road transport, highway permits and temporary gravel pads, typically costs between USD 150,000 and 250,000 before lost revenue from downtime is counted. Weather delays that keep crews and equipment waiting on site push standby costs higher still. The company says its uptower interventions in Europe usually cost 10 to 20 per cent of a full yaw ring replacement, and it expects equal or larger savings in North America because crane rates there are higher and equipment is scarcer.
“By performing the repairs using our mobile precision machining equipment directly at wind parks in the U.S., CNC Onsite aims to minimize both off-site transport logistics and crane usage which avoids lengthy downtime traditionally required for replacing main components,” said Søren Kellenberger, CEO and partner at CNC Onsite. “We are responding to strong demand from the U.S., where we’ve already successfully delivered several uptower projects.”
The equipment is modular and travels into the nacelle on the turbine’s standard internal hoist, where a technician supervises software-driven machining of damaged yaw ring teeth and generator shafts. A partnership with Dutch blade designer We4Ce covers blade root bushing repairs, a growing problem across ageing US fleets that otherwise means waiting months for replacement blades. The Houston office will start with Danish specialists and recruit a local technical workforce over time.
Carsten Brinck, senior partner at consultancy CoralPoint, which merged with Danish advisory firm Brinckmann, said operators in the US are placing greater emphasis on solutions that cut downtime, lower costs and extend the life of existing assets as the installed base matures.
The expansion follows CNC Onsite’s best financial year to date: gross profit rose 74 per cent to DKK 58.7 million in 2025, and the workforce has grown sixfold over the past decade to more than 60 specialists. Founded in 2012, the company also machines large-diameter flanges and blade root ends for onshore and offshore turbines, including offshore foundations. It will present the US operation at WindEnergy Hamburg 2026 in Hall B1.
