SPINDLE REPAIR
SPINDLE
REPAIR
Main, sub and milling spindle repair for CNC lathes. Spindle service and spindle repair — we discuss scope and terms with you in person.
Symptom, not part number?
- Concentricity deviation · Chatter marks on the workpiece
- Bearing noise · Grinding noise
- Spindle overheating
- Tool drops out during machining
- Spindle speed fluctuation
RESPONSE
UNDER 24H
ON BUSINESS DAYS
PERSONAL
FROM A TECHNICIAN
SCOPE OF SERVICE
SPINDLE SERVICE / SPINDLE REPAIR
SPINDLE SERVICE
Inspection, measurement, minor overhaul work — for when the spindle still runs but shows signs of trouble.
on request
SPINDLE REPAIR
Full repair with bearing, seal and encoder replacement plus balancing — for when the spindle fails or is no longer usable.
on request
We determine exactly what work is needed after a visual inspection and measurement. Scope and cost are always discussed with you in person beforehand — no off-the-shelf flat-rate packages.
WORKSHOP PROCESS
HOW A SPINDLE REPAIR WORKS HERE
Four steps, one fixed process — from intake to test run. Before it goes back out, every spindle runs on the test bench with a function test report, so concentricity, bearing play and encoder signal are documented, not just claimed.
INTAKE
Ship the spindle in, or have our team remove it on site — also available directly in NRW and OWL.
DISASSEMBLY
Disassembly, cleaning, measurement of every component with full component documentation.
OVERHAUL
Bearing replacement, seal replacement, encoder service if needed, reassembly to original preload.
REASSEMBLY & TEST
Test run on the test bench with function test report, final inspection and return shipment — per the agreed scope.
- Concentricity
- Bearing play
- Encoder signal
- Test run on the test bench
DECISION GUIDE
REPAIR OR EXCHANGE SPINDLE?
REPAIR
A repaired main spindle with new bearings, seals and balancing often reaches original accuracy again. Typical turnaround: 8 to 15 business days from workshop intake, depending on bearing availability.
EXCHANGE SPINDLE
Available faster, but more expensive than repairing the existing spindle. Worth weighing up when downtime or the remaining service life of the other spindle components is tight.
What's worthwhile depends on spindle type, machine value and remaining service life — we discuss that with you in person beforehand, after a visual inspection and measurement. For a deeper look at symptoms and causes, see our Spindle Guide.
For customers in the US, an exchange or new spindle can simply be shipped to you — the old spindle doesn't have to travel to Germany for repair first. We can also arrange on-site support through our partner network in the US — ask us.
SYMPTOM DIAGNOSIS
TYPICAL SYMPTOMS AND WHAT'S BEHIND THEM
These are the four symptoms we see most often in the workshop. Below is the rough component class for each — the exact diagnosis is made by phone or after a visual inspection.
SPINDLE CHATTERS / CHATTER MARKS
Can come from the tool, the workholding, or the spindle itself — component class: bearing preload, tool holder, workholding, vibration from the drive.
More on this fault patternERROR CODE “SPINDLE TIMEOUT”
The control expects a spindle signal and doesn't receive it within the expected time window. Component class: encoder, encoder cable, drive amplifier, spindle motor.
More on this error codeCHATTER — THE 3 CAUSES
Bearing preload lost after 8,000 to 15,000 operating hours, a single damaged rolling element, or an encoder/control-loop issue rather than mechanics.
Causes in detailSPINDLE OVERHEATING
Doesn't have to be bearing damage: the first checks are cooling fan speed and lubrication — only after that does a bearing defect move into focus.
Spindle Spare PartsIN THE PARTS FINDER
From our parts master: spindles
724 parts related to spindles and spindle assemblies in the parts finder, 71 of them available at short notice.
Counted: description contains one of the card terms or the abbreviations HSP/GSP (main/counter spindle); ball screws not counted · parts list as of 25 September 2026
// 01
Milling spindle
83 parts
View in parts finder →// 02
Tool spindle
81 parts
View in parts finder →// 03
Main spindle
77 parts
View in parts finder →// 04
Counter spindle
71 parts
View in parts finder →// 05
Motor spindle
42 parts
View in parts finder →// 06
Headstock
42 parts
View in parts finder →// 07
Spindle bearing
38 parts
View in parts finder →// 08
Spindle motor
23 parts
View in parts finder →// 09
Spindle encoder
22 parts
View in parts finder →// 10
Spindle cooling
9 parts
View in parts finder →FROM STOCK
Matching parts from our catalogue
Repair work often needs the part as well. An extract from our workshop stock with the number each item is listed under — price and lead time on request.
FROM STOCK
54 SPINDLE-RELATED PARTS IN THE CATALOGUE
Stator sets, motor spindle windings and complete spindle motors for CTX, TWIN, GMX and MF series — part of 806 motor part numbers in stock overall.
Browse the catalogueSPINDLE DRIVE · STATORS & MOTORS
- ES-342-25585-XStator AC-Hauptspindel.CTX400+MF TWIN 65
- ES-342-25460-8Stator AC-Gegenspindel 7,5KW DKE112M
- ES-342-63628-4Stator Tauschteil C-Gegenspindel.DKE112L66 MF TWIN 65
- ES-342-90745-8Stator Tauschteil AC-Hauptspindel MF Sprint 65
- ES-344-21172-8Hauptmotor DMU50 1PH7107 Tauschteil
- ES-344-72845-3Hauptmotor 1PH7163 Tauschteil
Show all 12 items
SPINDLE ENCODERS & BELT DRIVE
- ES-345-82057-4Spindelpositionsgeber Fanuc-Kuroda
- ES-345-70955-XGeber Spindel Kuroda ersetzt du 9137344
- ES-345-36394-7Drehgeber Spindel Fanuc A86L-0027-0001#102
- ES-345-13565-0Messring ERM200 2048 Impulse ISM76 Spindel
- ES-570-42537-4Zahnriemen Spindel HTD 880-8M-12 rund CT40+CTX400
- ES-570-25730-7HTD-Zahnriemen. 880-8M-6 Spindelgeber 1 Satz=2Stück
FREQUENTLY ASKED QUESTIONS
QUESTIONS FROM THE WORKSHOP FLOOR
How do I know if the spindle is really the problem?
Chatter marks on the workpiece or unusual noises can come from the tool, the workholding, or the spindle itself. That's why we listen first on the phone, before narrowing down the component class.
What does the repair process in the workshop actually look like?
Intake of the spindle by shipping or on-site removal, visual inspection and measurement, disassembly with component documentation, bearing and seal replacement, reassembly to original preload, and finally a test run on the test bench with a function test report, before the spindle goes back to you.
Is a repair worthwhile, or does an exchange spindle make more sense?
That depends on spindle type, machine value and remaining service life. A repaired main spindle with new bearings, seals and balancing often reaches original accuracy again — an exchange spindle is available faster, but more expensive.
How long does a spindle repair take?
Typically 8 to 15 business days from workshop intake, depending on bearing availability. Spindles with special bearing arrangements or a rare configuration take longer — we clarify that before the repair starts.
Which spindle spare parts does ESDI carry in stock itself?
The motor parts catalogue lists 806 motor part numbers, 54 of which relate directly to spindles — stator sets, motor spindle windings and complete spindle motors for CTX, TWIN, GMX and MF series.
SPINDLE
CONSULTATION
Describe your spindle: machine, symptom, and a photo of the nameplate if you have one. We get back to you within 24h on business days — directly from a technician, not a call centre.
- Reply within 24h on business days
- Personally from a technician — no bots, no call centre
- Your inquiry never leaves our workshop
ISO 9001:2015 · DEKRA certified