Gear & Component Testing

  • Power Re-circulating Gear Testing
    • Bending and Contact Fatigue
    • Scoring Resistance
    • Friction Measurement
    • Oil Off/Loss of Lube Testing
    • Lubricant Evaluation
    • Spur and Helical Gears
    • Test Speeds up to 10,000 RPM
    • Programmable Load Profiles
  • Single Tooth Bending Fatigue Testing
    • Economical Bending Fatigue Evaluation
    • Standard Fixtures Available
    • Custom Fixture Design
    • Spur, Helical, Spiral Bevel, Face Gears
    • Crack Propagation Studies
    • Reverse Bending
  • Rolling Contact Fatigue Testing
    • Economical Contact Fatigue Evaluation
    • Various Roll/Slide Ratios
    • Contact Stresses up to 475 KSI
    • Lubricant Temps up to 400°F
    • Traction Force/Friction Measurement
    • Oil Off/Loss of Lube Testing
  • Impact Strength Testing
    • High Strain Rate Bending Strength Evaluation
    • Load and Position Instrumentation
    • Absorbed Energy During Failure


  • Gear Materials Characterization
    • Microstructure
    • Superficial and Micro-hardness
    • Corrosion
    • Wear/Tribology
    • Surface Roughness
      • Optical Interferometry
    • Residual Stress
    • Failure Analysis
      • Light, Electron and Acoustic Microscopy
      • Energy Dispersive Spectroscopy
      • Element Mapping and CT Scanning for Inclusion Detection


Metrology and Prognostics

  • Metrology
    • Full Gear Inspection Lab
      • M&M Gear Inspection Machine
      • Maag Gear Inspection Machine
      • Zeiss CMM
    • All Test Gears Inspected
    • Verification of Gear Geometry and Bending Stress Calculations
  • Prognostics
    • Algorithms for Bending Failure Detection Developed
      • FFT/Sideband Analysis
    • Detection of Pitting/Micropitting Algorithm in Development


Latest News

Vol. 20, 2017 Foreward It's been a wonderful thirty years of my association and time with GRI, first...
The week of October 22 was packed full for GRI.  We attended the AGMA Fall Technical Meeting at the...

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