Blade Root
Repair
Restore damaged blade root inserts onsite, reducing downtime from months to days while avoiding transport, replacement, and factory lead times.
Blade Solution
Blade Root
Trusted by wind operators and OEMs across Europe and North America
- Vestas
- Siemens Energy
- NextEra Energy
- GE Vernova
- Enercon
- Nordex
- EDF Renewables
- Welcon
- RWE
- CS Wind
- EEW
- Muehlhan
- Nicon Industries
- Orsted
- Cadeler
- Vattenfall
- Smulders
- Windar
- Titan Wind
- SubC Partner
- Semco Maritime
- LM Wind Power
- Iberdrola
How It Works Restore The Blade Root.
Restore The Blade Root.
Not Replace The Blade.
Loose or damaged blade root bushings no longer mean replacing the blade or shipping it to the manufacturer. Built on We4Ce's patented Re-FIT bushing technology and our portable CNC machining, the blade root is repaired directly at the wind park. No blade transport. No factory lead times. Downtime drops from months to days.
Machine out the fault, bond in the fix
The blade is dismounted and placed in a repair environment on site - on the ground onshore, on a vessel deck offshore. A portable pre-programmed CNC machine drills away the faulty bushings to OEM specification, matching the exact dimensions of We4Ce's patented replacement inserts. New inserts are installed and fixed, recreating the bond between insert and blade.
Built for the wind park
- Repair environment set up at the site - onshore on the ground, offshore on a vessel deck
- Covers bushings, bolts and flange surfaces, typically 2-5 days on site
- Precise centering and controlled bonding - our CNC machining combined with We4Ce's insert and bonding expertise
Why repair beats replacement
On-site repair avoids blade transport, blade replacement, factory repairs and the associated logistics, cutting overall project costs by up to 60%, with an expected lifetime similar to the original.
Technical Specifications
Typical duration 2–5 days on site
Machining accuracy OEM specification
Surface finish CNC machined contact surface
Certification ISO 9001 | Verified solution
Equipment CNC blade root machining system
Repair scope Bushings, bolts, flange surfaces
Expected lifetime Similar to original
ISO 9001VERIFIED SOLUTIONREUSE OF BLADESREDUCED DOWNTIME
Total Economy Avoid blade transportation, blade replacement, factory repairs, and associated logistics, reducing overall project costs by up to 60%.
Reduced Downtime On site blade root repairs reduce downtime from months to days by eliminating transport, factory queues, and blade replacement lead times.
Repair Instead Of Replace Damaged blade root inserts are restored without replacing the blade, reducing costs and avoiding unnecessary waste.
Structural Integrity Combining CNC Onsite's precision machining technology with We4Ce's patented insert and bonding system ensures accurate positioning, reliable bonding, and long-term structural performance
How It Works
Our Process
01
Quotation Request
The wind park contacts us, reporting damage to the threaded bushings in the blade root. We discuss with you the extent of the damage. Determine if further actions are necessary to get the full picture of the damage. Based on the information, we will issue a quotation for the repair work. The wind turbine owner approves the proposal and issues a purchasing order. After that, we can begin the repair within days.
02
Planning
We plan the repairs together with our partner We4Ce. The job is planned in detail with minimal disruption and downtime in mind.
03
Implementation
First, the rotor blade is dismounted and placed in a repair environment within the wind park. The repair area can be created on the ground for onshore wind farms or on the deck of a vessel for offshore wind farms. Once the rotor blade is on the ground and placed in the repair environment, the repair work can start. The portable pre-programmed CNC machine drills away the faulty bushings, matching the precise dimensions of the specialized replacement bushings, developed and patented by We4Ce. New inserts are installed and fixed recreating the bond between the insert and the blade, Upon completion, normally after a few days, the blade can be reinstalled and the turbine can be reinstalled and power production resumed.
04
Handover
When the repairs of the threaded bushings are complete, our technician discusses the final result with the customer, who approves and signs off. We issue a repair report to the customer.
05
Follow-up
As part of CNC Onsite’s high quality standards and professional approach, we offer to follow up on the repair job.
Contact our team Let Us Find
Let Us Find
The Right Solution
Whether it's a repair, machining project, or custom machine solution, our engineers are ready to help you find the most efficient way forward.
Request received.
An engineer will get back to you within one working day.
Global reach
Wherever your turbines stand
On site within days Worldwide call-out, 24/7. Technicians mobilize within days of a purchase order.
Onshore & offshore The same in-nacelle method works at sea - no offshore crane deployment needed.
Five continents A proven repair track record on wind turbines across five continents.
FAQ
Frequently asked questions
Can a damaged blade root be repaired without replacing the blade?
Yes. Loose or damaged threaded inserts (bushings) in the blade root can be repaired on site at the wind park. A portable CNC machine removes the faulty bushings and new patented replacement inserts are installed and bonded, so the blade is reused instead of replaced or shipped to the manufacturer.
How long does a blade root repair take?
Typically 2-5 days on site. The blade is dismounted, repaired in a repair environment at the wind park and reinstalled, avoiding the months of downtime that blade transport and factory repair involve.
Why do blade root bushings come loose?
One cause is shrinkage of the resin when polyester is used. This can lead to microcracks that weaken the bond between the bushing and the blade, which endangers the structural safety of the blade root. Bonding failure can lead to the loss of a blade and in the worst case to a total turbine collapse.
Can blade root repairs be done on offshore wind turbines?
Yes. The repair environment can be created on the ground for onshore wind farms or on the deck of a vessel for offshore wind farms.
What is We4Ce's role in the blade root repair?
We4Ce is an international specialist in blade root connections and rotor blade technology. CNC Onsite provides the portable CNC-controlled machining that removes damaged inserts and restores the blade root geometry, while We4Ce contributes insert design, bonding technology and its patented Re-FIT replacement bushings.
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