Axle & Shaft
Repair
Precision machining of damaged and worn axle and shafts. Reducing downtime, repair costs and operational disruption.
General Industry Solutions
Axle & Shaft
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 Precision Machining
Precision Machining
For Axle & Shaft Repairs.
Worn or damaged axle and shaft journals are restored on site with a mobile CNC shaft turning system. No shaft removal. No component replacement. Equipment returns to service faster and at significantly lower cost.
A new wear surface, not a new shaft
The damaged material is removed in a controlled machining process, creating a new reference surface with the required geometry. A new ring is then installed onto the shaft, restoring its functional dimensions and providing a new wear surface - at 0.05 mm positioning tolerance and a surface roughness of Ra 0.8 μm or better.
Built for precision-critical interfaces
- On generator shafts, even minor surface damage can prevent correct assembly - the repair is designed for applications where accuracy is critical
- Typically 2-5 days on site, covering generator and gearbox shafts
- Performed on wind turbine generators and other industrial machinery, to ISO 9001 and OEM specification
Why it beats replacement
Replacing a shaft means sourcing replacement parts, major disassembly and extended downtime. Restoring the damaged shaft avoids those costs - with an expected lifetime similar to the original.
Technical Specifications
Typical duration 2–5 days on site
Positioning tolerance 0.05 mm
Surface roughness Ra 0.8 μm or better
Certification ISO 9001 | OEM-spec
Equipment Mobile CNC shaft turning system
Applications Generator & gearbox shafts
Expected lifetime Similar to original
ISO 9001UPTOWER REPAIROEM SPECIFICATIONNO COMPONENT EXCHANGE
Repair Instead Of Replace Keep critical assets in service by repairing damaged shafts instead of replacing them, reducing downtime and avoiding disruptions to production.
Reduced Downtime Restoring damaged shafts is often considerably faster than sourcing and replacing major components, helping operators return turbines, generators, and industrial machinery to operation sooner.
Precision machining The repair process is designed for applications where accuracy is critical.
Reducing Total Economy Avoid the costs associated with replacement parts, extended downtime, and major disassembly by restoring the damaged shaft instead.
How It Works
Our Process
01
Quotation Request
The manufacturer contacts CNC Onsite to discuss specifications for the monopile flanges. Our technical sales team will analyse the project and customer schedule. We will issue the quote based on the customers need and timeline. The customer issues the purchasing order.
02
Planning
We plan the technical part of the project, which includes preparation and programming of Goliath, the precision machine that will perform the milling. We plan staff availability and timing, including flexibility to accommodate potential changes to the schedule.
03
Implementation
Our technicians will conduct the precision milling of the flanges at the customer’s factory. Alternatively, CNC Onsite will train the customer’s own technicians for the operation of the machine. The team will use the Goliath machine to mill the flange faces, leaving them flat to within one millimeter.
04
Handover
After machining measurements are made, a measurement report is issued to the customer. Alternatively, the customer or a customer-contracted third party conduct the measurements. Once the measurement are complete, the customer signs off the work.
05
Follow-up
We offer follow-up meetings with the customer. CNC Onsite’s follow-up program is part of our high quality standards.
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.
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
How long does an on-site axle or shaft repair take?
Typical duration is 2 to 5 days on site. Restoring a damaged shaft is often considerably faster than sourcing and replacing major components, helping operators return turbines, generators and industrial machinery to operation sooner.
Do you need to remove the shaft to repair it?
No. The repair is performed on site with a mobile CNC shaft turning system. The damaged material is removed in a controlled process and a new ring is installed onto the shaft, restoring its functional dimensions without removing or replacing the shaft.
What tolerances can be achieved with on-site shaft machining?
The repair achieves a positioning tolerance of 0.05 mm and a surface roughness of Ra 0.8 micrometres or better, delivered under ISO 9001 and to OEM specification.
What types of shafts can be repaired on site?
The solution covers generator and gearbox shafts on wind turbine generators and other industrial machinery. It is designed for precision-machined interfaces where even minor surface damage can prevent correct assembly.
How long does a repaired shaft last?
The expected lifetime is similar to the original. The machining creates a new reference surface with the required geometry, and the new ring provides a new wear surface.
