Yaw Ring
Teeth Repair
Patented uptower repair. No crane. No nacelle removal. Back in production in 2-4 days.
Uptower Service Yaw Ring
Yaw Ring
How It Works Precision machining.
Precision machining.
Inside the nacelle.
Using precision machining, the yaw ring is repaired on-site — leading to significant savings and reduced CO2 output compared to replacement. Our patented system removes the need for yaw ring replacement, eliminating the expensive, time-consuming and potentially detrimental disassembly of the rotor and nacelle.
Operated by our trained technicians, the patented CNC machine applies the proprietary repair method, working at extremely fine tolerances, to remove and reinsert machined yaw ring teeth precisely. The pre-fabricated replacement segments are designed to fit the damaged ring exactly — slotting in like a jigsaw piece.
Because repairs take place inside the wind turbine nacelle, our method is less dependent on weather conditions — reducing exposure to weather-related delays compared to conventional crane operations.
Reduced Downtime On-site repairs and rapid mobilization restore turbine performance in 2–4 days — not weeks.
Resources No new components, no cranes, minimal logistics. Significantly lower carbon footprint and manpower requirements.
Total Economy Repair instead of replace. No external cranes, no component shipping. 40–60% lower total project cost.
Durable Results Precision uptower repairs to OEM tolerance. Full measurement report and 12-month warranty on handover.
Our Process
From call to commission
01
Commissioning
The wind park reports damage to the yaw ring and turbine type. Within 24 hours, our repair technician calls to discuss the damage and assess repair options. Quote issued the same working day.
02
Planning
Repairs planned in detail to exact specification with minimal disruption. Yaw ring type and number of damaged teeth determine the pre-manufactured replacement segments. CNC machine programmed for the exact turbine type.
03
Implementation
Technicians arrive at dawn with portable CNC machine. Equipment assembled in the nacelle. Pre-programmed milling machine excises damaged segments, leaving precisely measured pockets. New segments inserted mechanically and fixed robustly.
04
Handover
Repair results discussed with customer. Turbine tested and started up. Job signed off by customer. Full repair report issued. Turbine back in production.
05
Follow-up
As part of our quality standards, we follow up on each job individually. Experience is documented for future cases. We trace each repair and follow up with the client to ensure continued satisfaction and longevity.
FAQ
Frequently asked questions
Can a yaw ring be repaired on a wind turbine?
Yes. A wind turbine yaw ring with damaged teeth can be repaired directly in the nacelle by technicians equipped with the right precision machine — without removing the whole yaw ring or nacelle.
How is the yaw ring repaired?
The repair is performed uptower without disassembling any wind turbine parts. The patented precision machine is programmed for the exact turbine type, mills away the damaged yaw teeth automatically, and leaves a precision-shaped pocket. Pre-fabricated replacement segments are inserted and fixed mechanically.
How many yaw ring teeth can be repaired?
In principle, all teeth on a yaw ring can be replaced using this method. Consecutive repairs are possible — there is no inherent limit to the number of teeth that can be addressed.
How common is yaw ring damage?
It is estimated that 5 to 10 percent of all turbines will experience yaw ring damage during their operational lifetime. Damage is not evenly distributed — some sites are more exposed, and multiple turbines within the same park are often affected.
How quickly can technicians be on site?
Technicians can be on site within days of a received purchase order, depending on location. The service is offered worldwide, 24/7.
Can repairs be performed offshore?
Yes. We offer repair services for both onshore and offshore turbines. Our method eliminates the need for offshore crane deployment, making the economics of offshore yaw ring repair viable for the first time.
Talk to our team Get expert advice
Get expert advice
on your project.
Send us your damage report or turbine type and we will respond within one working day with an assessment and indicative quote.