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Milling & turning spindles, OSP control spindle motors, belt and direct-drive units — rebuild, bearing swap, encoder repair.
Learn more – Okuma spindle repair
Germany · Precision Repair · All Manufacturers
CNC Spindle Repair & Service for Every Machine Brand
From high-speed milling spindles to heavy-duty lathe spindles — our German workshop diagnoses, rebuilds and balances spindles for machines from Okuma, Fanuc, Mazak, DMG Mori, Haas, Siemens and every other major manufacturer, and stands behind the work we do. On-site service across Europe or ship it straight to us.
1Business-Day Response
ISO 21940Balancing Standard
WorldwideSpindle Shipping
Machine Manufacturers
We Service Spindles From Every Major Brand
Open a manufacturer below to see the spindle types and typical repairs we handle for that brand. Your brand is not listed? We service spindles from virtually every make of CNC machine tool — just get in touch. Each brand builds its spindles differently: some use belt-driven cartridges, others built-in motor spindles with their own encoder and cooling circuit, and grinding machines often carry hydrostatic units. That is why we identify the spindle from its nameplate before quoting, check which bearings, seals and sensors it needs, and confirm parts availability for older models in the quote.
Fanuc
Fanuc αi/βi spindle motors and built-in motor spindles used in many builders' machines — rewinding, bearings, sensor checks and dynamic balancing.
Learn more – Fanuc spindle repairMazak
Multi-tasking & turn-mill spindle rebuilds, live-tool spindles and milling-head spindles of Integrex machines.
Learn more – Mazak spindle repairDMG Mori
powerMASTER and speedMASTER spindle overhauls, torque motor spindles, 5-axis head spindle alignment and repair.
Learn more – DMG Mori spindle repairHaas
VF-series and lathe spindle cartridge rebuilds, belt-drive and vector-drive spindle motor repair, drawbar service.
Learn more – Haas spindle repairSiemens
Siemens 1PH8 spindle motors and 1FE1 motor spindles — bearings, encoder replacement, winding repair and Sinumerik/Sinamics fault diagnostics.
Learn more – Siemens spindle repairHeidenhain
Encoder calibration and integration for TNC-controlled spindle systems, feedback signal diagnostics and repair.
Learn more – Heidenhain spindle repairDoosan
Puma & Lynx lathe spindle rebuilds, built-in motor spindle rewinding and precision bearing replacement.
Learn more – Doosan spindle repairHurco
Vertical machining center spindle cartridge exchange, gearbox and belt-drive spindle overhaul.
Learn more – Hurco spindle repairBrother
High-speed tapping center spindle rebuilds, compact BT/HSK spindle bearing and seal replacement.
Learn more – Brother spindle repairMakino
High-precision graphite & mold-die spindle service, ceramic bearing replacement, ultra-fine balancing.
Learn more – Makino spindle repairMitsubishi
Mitsubishi Electric SJ-series spindle motors and EDM units — bearing rebuilds, rewinding and encoder checks.
Learn more – Mitsubishi spindle repairGrob
5-axis universal machining center spindle head overhaul and geometric alignment restoration.
Learn more – Grob spindle repairHermle
High-precision milling head spindle rebuild, thermal-stability bearing preload adjustment.
Learn more – Hermle spindle repairToyoda
Grinding spindle precision rebuild, hydrostatic and hydrodynamic spindle bearing service.
Learn more – Toyoda spindle repairHomag
HSD electrospindles from Homag routers and machining centres — HSK F63 clamping, sealing air, sensors and high-speed bearings.
Learn more – Homag spindle repairHSD
Italian electrospindles for CNC routers and woodworking centres: bearings, tool clamping, sensors, rewinding.
Learn more – HSD spindle repairElte
Air-cooled router electrospindles with ER collet, ISO30 or HSK F63: bearings, balancing, run-in.
Learn more – Elte spindle repairNot on the list? We also regularly service spindles from Chiron, Matsuura, Kitamura, Fadal, Deckel Maho, Emco, Star, Citizen, Index, Gildemeister and many other manufacturers — get in touch with your machine model.
About Our Workshop
Independent CNC Spindle Repair — Workshop Based in Germany
We are a specialized, manufacturer-independent workshop dedicated entirely to the repair, rebuild and maintenance of CNC machine tool spindles.
Every spindle that comes through our doors — whether it is a compact tapping-center spindle from a small job shop or a heavy-duty turning spindle from a production line — receives the same disciplined process: full diagnostics, precision measurement, careful disassembly, and a rebuild that is checked against tight tolerances before it ever leaves our facility. We do bearings, balancing and documentation thoroughly, because a spindle that fails again in three months costs our customers far more than the repair itself.
As an independent workshop, we work across all manufacturers rather than within a single parts catalog or service network. Our technicians have hands-on experience across the full spectrum of CNC spindle technology — belt-driven, direct-drive and built-in motor spindles, mechanical and hydrostatic bearing systems, and control interfaces from Siemens, Fanuc, Heidenhain, Mitsubishi and other major suppliers. That breadth lets us take on spindles of every make and age, including older and discontinued models: we identify the unit from its nameplate and source the bearings, seals and parts it needs.
Our workshop is based in Germany, giving customers throughout Central and Western Europe fast access to on-site diagnostics and installation, along with reliable freight connections for shipping spindles to and from our facility. Whether your production line is in Munich, Milan, Lyon or Rotterdam, we agree the on-site date with you directly, and spindles shipped to our workshop are logged, inspected and quoted quickly so your machine is back in production with minimal delay.
We work with CNC machine shops, automotive suppliers, aerospace manufacturers, tool and die makers, and machine tool resellers who need a dependable partner for spindle work — whether that means a single emergency repair, an ongoing maintenance contract, or exchange spindles that keep downtime to a minimum.
Coverage
Spindle Types We Work On
From high-speed machining centers to heavy-duty lathes and precision grinders, we cover the full range of spindle designs found in modern CNC equipment. The type matters more than the machine name: a high-speed motor spindle needs different bearings, preload and run-in than a heavy lathe spindle or a hydrostatic grinding spindle. Below are the groups we work on most often. Every unit is stripped, measured and documented in the same way, whichever group it belongs to, and the test report states the values measured before it leaves the workshop.
Milling Spindles
Vertical and horizontal machining center spindles, from belt-driven units to high-speed built-in motor spindles running above 20,000 RPM.
Turning & Lathe Spindles
Main and sub-spindles for CNC lathes and turning centers, including live-tool and multi-tasking spindle assemblies.
Grinding Spindles
High-precision hydrostatic and hydrodynamic grinding spindles rebuilt to ultra-fine runout and balance tolerances.
Drilling & Tapping Spindles
Compact high-speed spindles for tapping centers and drilling heads, including multi-spindle drilling units.
Built-In Motor (Electro) Spindles
Integrated rotor/stator spindle motors requiring specialized rewinding, insulation and thermal management expertise.
5-Axis & Angle Head Spindles
Complex swivel-head and angle-head spindle assemblies for 5-axis machining centers, including bevel gear service.
EDM & Wire-Cut Head Spindles
Precision spindle and guide-head service for wire and sinker EDM machines, including flushing seal and bearing rebuilds.
Wood & Composite Router Spindles
Air- and water-cooled router spindles for CNC woodworking and composite panel cutting, including collet and seal service.
Symptoms We Diagnose
Common Spindle Problems We Fix
Not sure whether your spindle needs a full rebuild or a minor repair? These are the issues we see most often — get in touch and we'll help you figure out which one applies. Most spindle faults start small: a slightly louder bearing, a little more heat, a finish that is no longer quite right. Caught early, they are often a bearing and seal job; left running, the same fault can damage the shaft seats, the housing or the windings and make the repair much larger. If you can describe when the symptom appears, cold, warm or only at certain speeds, it helps us narrow the cause down before the spindle arrives.
Unusual Noise or Grinding
Often a sign of worn or damaged bearings, contamination, or a loose internal component — best addressed before it damages the housing.
Bearing replacementExcessive Vibration
Usually caused by rotor imbalance, bent shafts or bearing wear — corrected through precision dynamic balancing and part replacement.
Dynamic balancingOverheating
Blocked cooling channels, degraded lubrication or winding faults raise spindle temperature and shorten bearing life if left unresolved.
Diagnostics and inspectionPoor Surface Finish & Runout
Taper wear or bearing play increases runout, degrading part quality — corrected with taper regrinding and bearing replacement.
Taper and runout correctionOil or Grease Leakage
Worn seals allow lubricant loss and contamination — replaced during a full teardown and rebuild.
Housing repair and regrindingSpindle Drive & Encoder Faults
Speed feedback or encoder errors on the control display, resolved through electrical diagnostics and sensor replacement.
Encoder and sensor repairTool Clamping / Drawbar Issues
Weak or inconsistent tool clamping force, often caused by worn disc springs or a faulty drawbar mechanism inside the spindle.
Diagnostics and inspectionSudden Seizure or Total Failure
Complete lock-up from bearing collapse or catastrophic contamination — usually requires full teardown and rebuild.
Diagnostics and inspectionWhat We Repair
Complete CNC Spindle Repair & Service Program
Whatever the fault — worn bearings, burnt windings, runout, chatter, noise, overheating, or a total seizure — our workshop covers the full scope of spindle repair and service work under one roof, for milling, turning, grinding and drilling spindles alike. The individual services are rarely ordered on their own. A typical rebuild combines several of them: diagnosis first, then bearings and seals, balancing and run-in testing at the end. Each card below links to a page that explains what the service involves, which measurements we take and what you receive in the report, so you can see what a repair includes before you send anything.
Diagnostics & Testing
Vibration analysis, thermal imaging, runout measurement and full electrical testing to pinpoint the exact cause of failure before any repair begins.
Learn more – Diagnostics and inspectionBearing Replacement
Precision-matched angular contact, cylindrical and hybrid ceramic bearings fitted with the bearing preload determined for the specific spindle type for smooth, quiet running.
Learn more – Bearing replacementRotor & Stator Rewinding
Full electrical rebuild of built-in motor spindles, including rotor re-sleeving, stator rewinding and impregnation for maximum thermal stability.
Learn more – Motor rewindingDynamic Balancing
Two-plane dynamic balancing to ISO 21940 grade G0.4–G1, for minimal residual unbalance at operating RPM for superior surface finish and bearing life.
Learn more – Dynamic balancingEncoder & Sensor Repair
Replacement and calibration of rotary encoders, temperature sensors and speed feedback devices for accurate CNC control communication.
Learn more – Encoder and sensor repairHousing Repair & Regrinding
Precision grinding of housing bores, seat repair, sleeve installation and corrosion remediation to restore original geometric tolerances.
Learn more – Housing repair and regrindingTaper & Runout Correction
BT, CAT, HSK and ISO taper regrinding and runout correction to sub-micron tolerances for consistent tool clamping accuracy.
Learn more – Taper and runout correctionPreventive Maintenance
Scheduled inspection programs, lubrication service and early-wear detection to extend spindle life and avoid unplanned downtime.
Learn more – Preventive maintenanceSpindle Exchange & Loaner Program
We can send out a rebuilt unit while yours is in the workshop where a suitable spindle is on hand and the exchange has been agreed in advance. Ask us before you plan around it.
Learn more – Exchange and loaner spindlesRetrofit & Upgrade
Upgrade older spindles with modern bearings, improved cooling jackets and higher-grade balancing and, where technically sensible, components that go beyond the original build.
Learn more – Retrofit and upgradeOn-site Installation & Commissioning
Our technicians travel to your facility for spindle installation, alignment, geometric checks and full machine commissioning.
Learn more – On-site installation and commissioningEmergency Support
Unplanned spindle failure halts production. For urgent cases, contact us during business hours and we'll prioritize your request.
Learn more – Emergency supportHow It Works
Our Spindle Repair Process
A clear, structured sequence from first contact to a spindle back in production — every unit is tracked through the same quality-controlled workflow. You know at every stage what has been found and what happens next. Repair and ordering start once you have accepted the written quotation, and every spindle leaves after balancing and a run-in test with recorded values. Typical turnaround is five to ten working days from arrival, depending on parts and on what the teardown reveals.
1
Inquiry & Diagnosis
Send us your spindle model, symptoms or photos. We come back to you with an initial assessment and a written quote before any work begins. Photos of the nameplate and the tool interface help us check the spindle type and parts availability first.
2
Quotation
After inspection we issue a fixed, transparent quote covering parts, labor and estimated turnaround time. It lists the parts, the work and the expected lead time, so you can decide before anything is done.
3
Disassembly & Inspection
Full teardown, cleaning and component-level inspection to confirm the complete scope of work. Every part is photographed and measured, and the findings go into the report you receive with the quote.
4
Repair & Rebuild
Bearing, winding, housing and seal work carried out by our experienced technicians to the specification agreed for your spindle. We carry out exactly the work you approved in the quotation; anything new found on the way is agreed first.
5
Testing & Balancing
Dynamic balancing, run-in testing and vibration measurement at full operating RPM before sign-off. The measured values are written into the test report that goes back to you with the spindle.
6
Shipping & Installation
Secure packaging and delivery, or on-site installation and commissioning by our own technicians. On request we fit the spindle at your machine and check it under load before handing it back to production.
Why CNC Spindle Service
Precision, Speed and Accountability
We built our reputation on doing the job right the first time — with the documentation and testing data to prove it. In practice that means measured values instead of general promises: runout, balancing grade, temperature during run-in and clamping force are written into the report for each spindle. We are an independent workshop, so we can choose the bearing and seal solution that suits your spindle and the way your machine is used.
German Engineering Precision
We measure with regularly calibrated precision instruments and document the values achieved for each spindle in the test report. Tolerances are measured, not estimated, both before the teardown and after the rebuild.
Independent, All-Brand Workshop
Not tied to a single OEM — we source and machine parts for virtually any spindle brand or model. We source bearings and seals from the bearing makers directly and machine parts in-house where needed.
Fast Turnaround
Standard repairs typically take around 5–10 business days, with expedited options available for urgent cases. The exact date depends on parts and findings; the binding date is the one we confirm to you in writing.
Loaner & Exchange Spindles
Keep your machine running with a rebuilt exchange unit while yours is being serviced. Ask us about availability for your spindle type before you remove the old unit from the machine.
Full Test Report with Every Repair
Every repair ships with balancing data and test results, and is covered by our 12-month liability for defects. The report lists runout, balancing grade, run-in temperature and, where relevant, clamping force.
On-site Across Europe
Our technicians travel to your facility for installation, alignment and commissioning wherever you are. Removal, refitting, alignment and commissioning on site are planned in advance with your team.
Full Traceability & Reporting
Every job is logged with photos, measurements and balancing data, so you always have a clear record of what was done and why. Photos from teardown and the measured values are kept, so the history of each spindle stays traceable.
Insured, Tracked Shipping
Spindles are crated and insured for transit, with tracked door-to-door logistics across Europe and beyond. Spindles are packed with the shaft secured and openings sealed, and you receive the tracking number.
Where We Work
Serving Clients Across Europe & Beyond
Based in Germany, our team regularly travels for on-site diagnostics and installation, and we ship rebuilt spindles worldwide via secure freight partners. The countries below are where we work most often — but we ship to and support clients in any country, so don't hesitate to reach out no matter where you're based. For customers outside Germany the spindle usually travels by freight forwarder; within the EU it moves without customs paperwork, and for other countries we help with the documents for a repair shipment.
Home Base
Western & Central Europe
Southern & Northern Europe
International
Countries and regions
Don't see your country listed? That's fine — we regularly ship spindles and coordinate on-site work well beyond this list. Wherever your machine is, get in touch and we'll work out the logistics.
Our Workshop
Spindle Repair in Progress
How a spindle repair runs — diagnostics, precision bearing work and dynamic balancing on spindles from a wide range of machine brands. All photos on this page are taken in our own workshop: spindles as they arrive, during teardown, with new bearings and after reassembly. They show the real condition of the units we work on, not catalogue pictures, and give you an idea of how carefully each spindle is handled from arrival to dispatch.
CNC spindle repair process.
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Questions & Answers
Frequently Asked Questions
Sending a spindle, on-site service and what to expect during a repair. Not answered here? Send us the spindle details or call us for a concrete answer.
We repair and rebuild spindles for all major CNC machine manufacturers — Okuma, Fanuc, Mazak, DMG Mori, Haas, Siemens, Heidenhain, Doosan, Hurco, Brother, Makino, Mitsubishi, Grob, Hermle, Toyoda, Homag and many more. If your brand isn't listed, contact us with the model and we'll confirm.
Standard repairs typically take 5–10 business days from receipt of the spindle, depending on parts availability and scope of work. Expedited turnaround and our emergency loaner program can significantly reduce your downtime.
Yes. Our technicians travel to customer facilities worldwide — most commonly across Germany and Europe — for diagnostics, installation, alignment and commissioning. Alternatively, you can ship your spindle directly to our workshop in Germany.
Our repairs are covered for 12 months from acceptance under our terms — our workmanship and the parts we install. The exact scope of work is set out in your quote. Every unit is dynamically balanced and run-in tested before it leaves the workshop and ships with a test report.
Contact us first for a quote and shipping instructions. We provide guidance on safe packaging, and can arrange freight collection from your facility anywhere in Europe.
Beyond Germany, we regularly serve customers throughout Austria, Switzerland, France, Italy, Poland, the Netherlands, Belgium, the Czech Republic, Spain, Sweden, Denmark and Turkey, plus international clients including the United States and the UAE.
Get In Touch
Request a Spindle Repair Quote
Tell us about your machine and the issue you're experiencing — we'll come back with a diagnosis plan and a fixed quote. The more we know up front, the more precise our first answer: photos of the nameplate and the tool interface, the machine model and a short description of the symptoms are usually enough. We reply with an initial assessment and the next steps, and work starts with your written approval.
Contact Details
Workshop AddressUferstraße 9, 53757 Sankt Augustin, Germany
Phone+49 1577 6064439
HoursMon–Fri, 08:00–18:00 CET/CEST
Two ways to work with us:
1. We come to you — our technicians travel on-site worldwide, most commonly across Germany and Europe, for diagnostics, installation and commissioning.
2. You ship to us — send your spindle to our German workshop and we handle the full repair and return shipping.