Spindle Repair

The spindle is the heart of your machine. Repair it right.

Atlanta Precision Spindles rebuilds CNC spindles for machine shops, manufacturers, and production facilities across the Southeast and nationwide. Bearing replacement, dynamic balancing, drawbar service, and Class 10K clean room assembly — for over 100 spindle brands and models.

Atlanta Precision Spindles has been repairing CNC spindles for production facilities across the country for decades. We service spindles from CNC routers, machining centers, turning centers, grinding machines, and 5-axis platforms — electrospindles, integral motor spindles, belt-driven spindles, and high-speed precision grinding spindles. If your spindle is making noise, producing bad finish, running hot, or has been through a crash, we can evaluate it, quote it, and rebuild it.

Every repair starts with a complete teardown and written inspection report. Work never begins until you approve the quote.

Spindle Repair by Brand & Platform

We repair spindles across a wide range of machine brands and spindle manufacturers. The platforms below represent our most common repair work — click through for model-specific information, failure patterns, and what the rebuild covers for each.

Don’t see your spindle brand listed? See the full list of spindles we repair or call us at (678) 225-7855 — we repair most production spindle brands and can confirm capability before you ship.

Why Most Spindle Repairs Fail Prematurely

A major contributor to premature spindle failure is caused directly by the spindle repair process itself. This is the thing most shops don’t tell you.

It is critical that the spindle repair facility you choose understands and maintains exacting tolerances, attention to detail, and the cleanliness levels that are absolutely imperative to long-term spindle health. Especially critical is the prepping and ultrasonic cleaning of all components utilizing 3-micron absolute filtration for all cleaning solvents, blowing off parts with compressed air that is dried to a minimum dew point of -40°F and filtered with 0.08-micron absolute filtration just prior to assembly. Final assembly must be done in a certified Class 10,000 Clean Room and, when practical, in a certified Class 1,000 Laminar Flow Bench.

The Bearing Contamination Problem

This is particularly important for open bearings that have been grease-packed for life. Precision ABEC 7 or 9 bearings exposed to dust and dirt particles that are 3–5 microns in size will be damaged before you can see it — the human eye with 20/20 vision can only see particles down to 40 microns. This invisible contamination is always present in a shop environment and can dramatically reduce bearing service life and cause premature spindle failure.

Even with air-oil or air-oil mist lubricated bearings, cleanliness throughout the entire process is critical. Bearings can ingest dirt during handling and assembly and sustain undetected damage during initial startup. The bearings won’t necessarily fail immediately — they deteriorate gradually over time. This is known as McPherson’s Curve: the chain reaction of wear. If bearings start out clean and are kept clean — with clean, dry lubricants and clean, dry compressed air — they can theoretically last indefinitely, unless crashed or mistreated.

What to Demand from Any Spindle Repair Facility

If your spindle repair source does not have — and actively maintain — the cleanliness levels that precision spindle work requires, you will eventually receive a spindle back from repair that fails prematurely. You are paying for that level of service and should demand it from anyone touching your production machine spindles.

Ask questions about the repair process and the level of expertise of the personnel doing the work. The spindle is the heart of your production machinery. As the saying goes: beware of bargains when it comes to repairing your spindles — the same way you’d beware of bargains when it comes to heart surgery.

The Atlanta Precision Spindles Standard

Atlanta Precision’s key people have spent years setting industry standards for clean, dry oil and clean, dry compressed air as they relate to spindle repair. Here is exactly what we do on every rebuild:

Ultrasonic Cleaning

All components are ultrasonically cleaned using solvents filtered to 3-micron absolute filtration. Parts are blown dry with compressed air dried to -40°F dew point and filtered to 0.08-micron absolute — just prior to assembly. No exceptions.

Class 10K Clean Room Assembly

All final assembly is performed in a certified Class 10,000 Clean Room and, whenever practical, in a certified Class 100 Laminar Flow Bench. For spindles requiring air-oil or air-oil mist lubrication, we use only purified lube oil meeting or exceeding ISO cleanliness level 14/13/10.

Written Repair Certification

Every spindle is run at its maximum rated speed and at the speed it’s historically operated in production. Detailed spectrum analysis is performed using Schenck-Trebel equipment — the world leader in balancing and diagnostic testing for rotating assemblies. You receive written certification before the spindle ships.

Common Symptoms That Indicate a Spindle Problem

Spindle wear is gradual. These symptoms are frequently misattributed to tooling, cutting parameters, or fixturing before the spindle is identified as the root cause — often after the damage has progressed further than it needed to.

Surface finish degrades at operating speed but is acceptable at lower RPM
Vibration or noise that appears at a specific speed threshold or under cutting load
Tool life shortening across multiple tool types without program changes
Heat concentrating at the spindle nose or headstock during production runs
Dimensional accuracy drifting during long cycles, especially on tight-tolerance features
Runout that varies between tool changes on the same holder
On ATC spindles: tool pull-out, torque-off alarms, or inconsistent tool seating

When symptoms correlate with spindle speed — finish, heat, vibration, or accuracy changing as RPM changes — the spindle assembly is the primary suspect. Two or more concurrent symptoms on a high-hour machine almost always means spindle work is needed.

Ready to Send Your Spindle?

Call us before you pull the spindle if you want help working through symptoms first. We’re based in Lawrenceville, GA and ship spindles back to shops across the country every week.

Phone: (678) 225-7855
Location: 1645 Lakes Pkwy Suite E, Lawrenceville, GA 30043
Process: Free inspection. Written quote. Work begins only after your approval.

Request a Spindle Repair Quote

Send us your spindle details below. Include the brand, model, and serial number if you have them — it helps us give you an accurate estimate before the spindle arrives.

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Frequently Asked Questions

What types of spindles do you repair?

We repair CNC router electrospindles, machining center spindles, turning center spindles, grinding spindles, and 5-axis spindles. That includes direct-drive integral motor spindles, belt-driven spindles, ATC spindles, and high-speed precision spindles. We service over 100 spindle brands including HSD, Mazak, Hurco, Mori Seiki, GMN, NSK, Colombo, Perske, Homag, Hiteco, Okuma, Matsuura, and many others.

How long does spindle repair take?

Most spindle rebuilds complete in 5–10 business days from receipt. Straightforward bearing replacements with no secondary damage run toward the shorter end. If rotor work, drawbar replacement, taper restoration, or housing repair is needed, the timeline extends — we communicate that clearly after inspection and before any work begins.

Do you offer a warranty on spindle repairs?

Yes. Every spindle repair is backed by our written repair certification and warranty. We run every spindle at its rated speed and perform spectrum analysis before it ships. If you have questions about warranty terms for your specific spindle, call us at (678) 225-7855.

Can you repair a spindle that took a crash?

Often yes, depending on severity. Light to moderate crash damage — taper wear, bearing damage, rotor imbalance — is typically addressable during a rebuild. Severe crashes that bend the shaft, crack the housing, or deform the taper beyond restoration require a different conversation. We inspect completely after teardown and give you an honest assessment before any repair work begins.

How do I ship my spindle to you?

Pack the spindle securely in a rigid container with adequate cushioning — spindles are precision instruments and transit damage can complicate assessment. Ship to: 1645 Lakes Pkwy Suite E, Lawrenceville, GA 30043. Call us at (678) 225-7855 before shipping if you want advice on packing for your specific spindle type.

Do you repair spindles on-site, or does the spindle need to come to your facility?

Most spindle repair work requires the spindle to come to our facility in Lawrenceville, GA — the clean room, ultrasonic cleaning equipment, balancing machines, and high-speed test equipment that make a proper rebuild possible aren’t portable. For shops that need on-site evaluation before committing to a teardown, call us to discuss what’s feasible for your situation.

Precision Spindle Repair