Classroom Training

Gear wear & damage recognition. Introduction to the new ISO 10825

A vision into the appearance and fundamental causes of gear failure modes. This training provides gear manufacturers and users with the necessary skills to examine, assess and recognize common gear failure modes.


Upon completion of the training, the attendants will be able to carry out the following:

  • Examine the different aspects of gear failures.
  • Assess and interpret common gear failure modes.
  • Appreciate what is considered normal wear and what could potentially be a problem and know the appropriate action to take.


14th June 2023


09:00 – 17:00 (GMT+8) Singapore

Who should attend?

Gear designers, gear service personnel, operators and users of valuable equipment, inspection and certification bodies who need to confidently examine gears and gearboxes and those new to the gear industry.


No specific gear knowledge is required


The teaching method alternates theory and practice through case studies or works directed.

Course outline:

  • ISO Standards
    • Key principles in ISO Standards
    • Members (how to get involved), Technical Committees and Working Groups
    • The different types of ISO publications
  • Basic concepts on the geometry of gears to “Teeth in involute”
    • Spur and helical gears
    • Meshing (contact ratio, interference, sliding)
    • Tooth modifications (profile and helix)
    • Contact pressure and tooth rupture calculations
  • Gear failure analysis method and failure recognition strategy.
    • Introduction to the common investigation methods and equipment used
    • Introduction to the new ISO 10825
    • Classification of failure modes in gears
      • Tribological damages (non-fatigued)
      • Fatigue damages
      • Non-fatigue fracture
      • Plastic deformation
      • Manufacturing issues
      • Other surface damage
  • Case studies (a chance to test your failure recognition skills).
  • Questions/answers.


This course will be conducted by Robert SHANDRO.


Principal Consultant with CETIM - MATCOR in the field of mechanical, power transmissions and materials engineering. A Specialist in failure investigation, forensic engineering and condition assessment with more than 30 years of consulting experience in Energy, Aerospace, Transportation, Shipbuilding and Public Works. Involved in close to 2,500 failure analysis and consulting services for litigation. Member of French delegation for ISO TC60 (Technical Committee), Expert in load capacity calculation of gears, terminologies, notation, strength and quality of materials for gears.
Member of IES (Institute of Engineers Singapore).

Areas of Expertise

  • Failure analysis of a wide range of mechanical equipment/components and structural facilities
  • Design, verification and failure analysis on mechanical power transmission components
  • Condition and remnant life assessment of mechanical power transmission components
  • Expert witness for litigation and insurance claims
  • Expert consultant and technical support on patent litigations
  • Standardization works (ISO TC60)



  • 5 years as Design Engineer (electric motors and generators)
  • 12 years as Technical Advisor (Judicial Expertise)
  • 13 years as Project Manager at CETIM
  • From year 2019 – Principal Consultant at MATCOR


  • Master of Engineering (MEng) UPT 1986
  • Master in Materials Science (MSc) ISMCM 1992