GearOffice © Consulting Services

Yefim Kotlyar has over 40 years of experience in the art of gearing. His expertise includes developments of various gear cutting & grinding technologies, development of gear inspection and evaluation technologies, development and implementation of SPC for gear manufacturing processes and design and validation of gears and gearing systems. He is also the author and one of the owners of GearOffice computer program. Yefim Kotlyar has served on a number of AGMA technical committees and he has authored many articles on gearing subjects.

GearOffice Consulting Services

Gear Design

  • Geometry analysis
  • Load analysis
  • Tolerance system
  • Profile & face contact ratios
  • Backlash/tooth thickness/DOP/Span
  • Specific sliding analysis
  • Reverse gear engineering
  • Design training

Gear Processing

  • Gear hobbing & skiving
  • Gear shaping
  • Gear form & generative grinding
  • Gear shaving
  • Gear process debugging training
  • Process tolerances
  • Tool wear & optimization
  • Machine adjustments

Gear Inspection

  • Analytical or elemental inspection
  • Involute profile, lead, Index
  • Size: TT, DOP, Span
  • Analysis of inspection results
  • Composite inspection
  • Tooth-to-tooth composite
  • Total composite
  • Manual inspection: DOP/Span/others
  • Gear inspection training

Statistical Process Control (SPC) for Gear Manufacturing

  • Why & when SCP is warranted
  • Applying SPC for involute profile
  • Applying SPC for tooth lead
  • Applying SPC for tooth index and size
  • SPC for machine runoffs
  • Cp & Cpk for bi-lateral tolerances
  • Cp & Cpk for unilateral tolerances
  • SPC training and setting-up forms