Guide · 5 min read · Updated October 2026

Servo motor: repair or replace? A practical way to decide

Repair usually costs less and is faster when the replacement is obsolete or on a long lead time. Replacement makes sense when the motor is badly damaged and a new one is cheap and available. Four questions settle most cases.

By Suresh Sankaran, founder of Star Automations, servo motor repair since 1998.

01Decide

Four questions

Question	Points to repair	Points to replace
Is a new motor available quickly?	Obsolete, imported or long lead time	In stock locally
What failed?	Encoder, bearings, brake, seal, connector, alignment	Burnt winding with damaged core, cracked housing
Does the motor carry machine-specific data or fit?	Special shaft, memory data, matched drive parameters	Standard catalogue motor
How critical is the axis?	Line down, needs the same motor back fast	Spare already available

02Costs

What a repair includes

A servo motor repair normally covers inspection, bearings and seals, encoder test and repair or replacement, alignment, brake service where fitted, and a load test with a report. Rewinding adds cost and time but is often still well below a new imported motor.

03Avoid

Mistakes that cost more later

Replacing an encoder without aligning it
Fitting a "similar" motor that needs drive re-tuning
Ignoring coolant ingress that caused the failure
Choosing the cheapest repair with no test report

04Help

When to send it to us

Send the nameplate and the fault; we tell you honestly whether repair is worth it. Send the nameplate or WhatsApp +91 97866 22233. Related: servo motor repair, when replacement lead time is weeks.

Free downloads for your maintenance file

Printable one-page sheets from our bench. More on the resources page.

Servo repair send-in form

Fill in and pack with the motor: nameplate details, fault seen, alarm code, drive model and the turnaround you need. Speeds up the quote and the repair.

PDF · 1 page · 4 KB · free, no sign-up

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Servo encoder alarm quick sheet

Common encoder and feedback alarms on Fanuc, Yaskawa, Mitsubishi and Siemens drives, what each usually points to, and what to check on the cable and connector first.