Spindle Repair

Spindle and Electrospindle Repair

At Pro-Spindle, every repair begins with a thorough technical diagnosis. Our objective is not simply to replace damaged components, but to identify the root cause of the failure, restore the precision of the assembly and re-establish the spindle’s correct operating conditions.

We repair spindles and electrospindles from different manufacturers, configurations and applications, ranging from conventional mechanical units to high-speed, high-precision electrospindles.

The entire process is carried out at our facilities by specialised technicians, using measurement, diagnostic, balancing and testing equipment suitable for the tolerances required by this type of equipment.

Diagnosis and Failure Analysis

Upon arrival, the spindle undergoes an initial assessment before being carefully disassembled under controlled conditions.

The main mechanical and electrical components are inspected, including bearings, shaft, tapers, tool clamping systems, sensors, encoder, motor, lubrication and cooling systems, as well as other components specific to each configuration.

Where applicable, we perform vibration and FFT analysis to assess bearing behaviour and identify potential causes of failure.

Following the inspection, we document the condition of the components and determine the work required to restore the unit.

Restoration and Re-engineering

Whenever technically feasible, we aim to restore precision components rather than simply replace them.

Our capabilities include grinding of tapers and functional surfaces, restoration of mechanical components, dimensional adjustments and re-engineering of parts that are no longer available on the market.

This capability is particularly valuable when repairing older spindles or models for which original components have been discontinued.

Precision Assembly

Spindle assembly requires strict control of cleanliness, tolerances, bearing preload and the positioning of individual components.

Each unit is assembled according to its technical specifications, respecting the parameters required to ensure precision, thermal stability and correct operation under its intended service conditions.

Sensors, encoders and tool clamping systems are adjusted and verified during the assembly process.

Balancing, Testing and Validation

A repair is only complete when the spindle has demonstrated that it is ready to return to production.

Following assembly, we carry out the necessary run-in, measurement and analysis procedures, monitoring parameters such as vibration, temperature and bearing behaviour.

Whenever the spindle configuration allows, we programme and parameterise the appropriate drive to perform progressive testing up to operating speed.

For high-speed spindles, we perform fine balancing up to grade G0.4, where technically applicable.

The objective is to validate the behaviour of the complete assembly before delivery and reduce the risk of problems after the spindle is reinstalled in the machine.

A Complete Repair Process

Our repair service may include:

• Technical diagnosis and root cause analysis
• Vibration and FFT analysis
• Inspection of bearings and internal components
• Repair and restoration of mechanical and electrical components
• Grinding of tapers and precision surfaces
• Component re-engineering
• Bearing replacement and adjustment
• Encoder and sensor adjustment
• Inspection of tool clamping systems
• Balancing of individual components and the complete assembly
• Drive parameterisation for testing
• Progressive speed and functional testing
• Vibration and temperature monitoring
• Fine balancing up to G0.4, where applicable
• Final inspection and quality control
• Technical repair report

Quality Through to the Final Test

For us, repairing a spindle does not simply mean getting it running again.

It means understanding why it failed, restoring its precision and technically validating its performance before it returns to the machine.

This principle guides every repair carried out by Pro-Spindle.

All parts repaired or replaced by Pro-Spindle are covered by a warranty of up to 12 months, in accordance with the conditions applicable to the service performed.