Spindle Testing Specialists
Comprehensive Spindle Testing
Returning your spindles to full operational precision
Post-Repair Testing & Quality Assurance
At Spindle Systems (UK) Ltd, we don’t just repair spindles, we return them to full operational precision through a meticulously controlled and fully documented testing process. Every repaired spindle is put through a comprehensive series of performance and quality assurance checks to ensure it operates as intended, or better.
Final Testing: What We Measure
After the mechanical rebuild and dynamic balancing process is complete, each spindle undergoes multi-point testing in our dedicated test bay:
Drawbar Pull Force Testing
Accurate measurement of clamping force for all taper types using calibrated drawbar tester produced by OTT
Ensures proper tool retention and elimination of tool vibration during operation
Compared against OEM specifications and recorded for traceability
Encoder & Sensor Signal Verification
Oscilloscope capture and analysis of encoder waveforms
Verification of pulse integrity and signal timing for speed control and positioning accuracy
We test a range of encoder types including incremental, absolute, TTL, and analogue systems
Vibration & Noise Analysis
Dynamic balancing validation at full speed
Use of vibration sensors and software to monitor bearing behaviour
Checks for early signs of imbalance, resonance, or bearing degradation
Runout Checks (Taper & Shaft)
Precision dial indicator or laser measurement to verify:
- Spindle taper runout
- Front and rear shaft deviation
Tolerances checked to within 2 microns or OEM specification
Thermal Stability & Bearing Preload
Controlled test cycles to monitor:
- Temperature rise over time
- Bearing preload behaviour under speed and load
Ensures thermal expansion and component alignment meet expected norms
Full-Speed Run & Load Simulation
Spindles are run at operating RPM or beyond (if required) under simulated load
Observation of noise, temperature, current draw, and acceleration profiles
Ensures the spindle is ready to go back into production with zero surprises
Test Reports & Certification
Every tested spindle comes with a detailed performance report, including:
Measured drawbar force values
Encoder signal plots (waveform images)
Runout and balance data
Temperature and vibration profiles
Technician inspection sign-off
Optional video footage of the test run
This transparent documentation gives our clients total confidence in the reliability and precision of every spindle we return.
Final Quality Assurance – Built for Reliability
Our testing process mirrors real-world application demands—because we know a spindle’s performance on our test bench must translate directly to real-world cutting conditions.
Whether for high-speed milling, heavy-duty turning, or precision grinding, we validate every aspect of spindle functionality to deliver a worry-free return to service.
Test-Verified. Ready for Production.
All spindles leave our facility fully tested, certified, and production-ready, with full technical documentation included.
Need help reinstalling? Our on-site spindle removal and refit service ensures a seamless handover from testing facility to your machine tool.