Spin Testing Services

Test Devices Inc. (TDI) serves customers who work with high-speed rotating components of cutting-edge machines operating under arduous conditions, as found in jet engines, turbomachinery, high-speed electric motors, and energy storage systems. We serve a long list of customers, including many leading OEMs, by providing innovative solutions to challenging problems in engineering testing and manufacturing spin processes. TDI offers various spin testing and rotor balancing services to support design validations, critical engine part certifications and manufacturing processes.

See the links below to find more about TDI’s Spin Testing and Balancing services. Download our Spin Testing e-book to learn more about the subtle art of achieving a high-quality spin test for manufacturing processes.

Spin Tests For Manufactured Parts

  • Overspeed Testing

    Overspeed Testing

    Proof and Overspeed testing are a mainstay for manufacturers of turbomachinery and other rotating equipment. Essentially, a rotating component is accelerated to a certain speed greater than that ever seen in operation. Overspeed testing is included in the FAA certification of aircraft turbine engines. Test Devices has conducted many such tests.

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  • Forging Pre-Spin

    Pre-Spin Testing

    When new designs or materials are being introduced, more thorough test data is often required to validate predicted growth models. Test Devices can measure elastic and plastic radial growth of components in real time while rotating. This technique can verify stress and growth models and determine precise gaps between rotating and stationary components in turbomachinery.

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Spin Tests For Design Validation

  • Burst Testing

    Burst Testing

    Spin burst testing provides customers with an efficient method to validate rotor designs and establish component safety margins. All tests are performed under the safest conditions, in a robust spin chamber installed in a test cell with double-reinforced concrete walls and ceiling. Optional high speed video recording of the burst event can provide invaluable information about the rotor failure mechanism.

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  • Low Cycle
    Fatigue Testing

    Low Cycle Fatigue Testing

    Establishing the fatigue life of a rotating component is critical to establish safe working life criteria. Test Devices offers LCF spin testing services with rapid cycling capability that accelerates fatigue testing programs, providing customers with life-assessment data earlier. Optional crack detection can monitor component integrity in real time, enabling a test to be stopped prior to rotor failure.

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  • Dynamic
    Spin Testing

    Dynamic Spin Testing

    Test Devices’ Dynamic Spin Testing of bladed disks provides the ability to excite airfoil and disk vibratory modes of fully or partially bladed engine rotor stages. This dynamic testing method enables characterization of the vibratory performance of blade designs to evaluate the effectiveness of damper designs and to assess the high cycle fatigue life of blade and damper systems. Tests can be conducted at ambient temperature or elevated temperatures exceeding 1000°F.

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  • Thermal Gradient

    Thermal Gradient

    During operation, rotating components are exposed to stresses due to thermal gradients that can exceed the centrifugal stresses. Test Devices can provide customers with more relevant test data by performing spin proof tests with thermal gradients that more closely simulate the complete stress state experienced by components in operation.

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  • Overspeed Certification
    Testing (Proof Testing)

    Overspeed Certification Test (Proof Testing)

    Proof and Overspeed testing are a mainstay for manufacturers of turbomachinery and other rotating equipment. Essentially, a rotating component is accelerated to a certain speed greater than that ever seen in operation. Overspeed testing is included in the FAA certification of aircraft turbine engines. Test Devices has conducted many such tests.

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Add-On Services

Growth Measurement at Speed

Test Devices can measure elastic and plastic radial growth of components in real time at speed. This technique can verify stress and growth models and determine precise gaps between rotating and stationary components in turbomachinery.

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Optical Strain Survey

Traditional strain measurement techniques collect data only from a selected number of locations. Decisions on where to locate strain gages are typically based on analytical models or “educated guesses.” Often, the manner in which a gage is mounted, and the interpretation of the resulting data, is a topic of debate.

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Strain Survey

Test Devices offers comprehensive strain surveys of complex rotating parts. Strain surveys enable customers to understand assembly stresses and determine the properties of materials (including composites) when exposed to operational strain under realistic conditions.

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Tooling & Arbor Engineering

Tooling design and fabrication is a specialty of Test Devices. This is hardware that attaches the test component to the drive of the spin rig. It must withstand the same forces as the test article and deform at speed such that it does not impart unrealistic stresses to the test article. This can involve complex engineering solutions for extreme test conditions and when the test article does not have features for attachment.

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High Speed Video Imaging

Standard spin pit burst testing is done to establish the speed at which the rotating assembly fails due to centrifugal stress. Customers need this failure speed to determine the safety margin during normal operation. While a standard burst test only provides the failure speed, High-Speed Burst Testing Video provides visual documentation that helps customers determine the cause of the burst.

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Real-Time Crack Detection System

The development of high-speed machinery requires extensive testing to establish the useful life of rotating components. The fundamental tool for life assessment is Low Cycle Fatigue (LCF) testing, in which rotating components are cycled from low speed (low stress) to operational speed (high stress) repeatedly for a prescribed number of cycles, at both ambient and elevated temperature gradients. Monitoring the condition of components in real time during LCF testing can provide critical information, especially when a crack initiates, as well as reduce testing downtime for component inspection.

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Value Props

One-Stop Spin Testing

Test Devices has developed a group of strategic partners – expert and dependable vendors who provide adjunct services to spin testing. This allows customers to produce a single purchase order to Test Devices and benefit from seamless project management, start to finish.

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Data Acquisition & Reporting

All data (including speed, vibration, temperature, and strain) is recorded on digital data-acquisition systems. Customers can be provided with color printouts of the data and electronic copies of the raw data when necessary. Test Devices archives the digital data indefinitely for future customer reference.

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Balancing Services

Spin Testing and Balancing Services often go hand-in-hand.

Learn more about our balancing services here!

Download Our Spin Testing eBook!