Gear technology – for design, analysis and optimisation

Advanced gear modelling and analysis tools for a refined design

Advanced root stress analysis for thin-rimmed gears

RomaxDESIGNER’s advanced Finite Element numerical analysis tool for assessing gear bending strength accounting for gear rim distortion, specifically for thin rim gears or highly loaded gears has been further extended to include additional capability and enhancements.

  • Improved meshing of root stress model resulting in faster solve time without compromising on accuracy.
  • New Multi mesh root stress analysis capability
  • Inclusion of Thermal expansion and Centrifugal effects on root stress
  • Automation and optimisation of gear geometry and root stress mesh now possible with Design of Experiments and Batch process
  • Gears can now be specified as being milled (non generated) allowing greater flexibility over root geometry
  • No third-party Finite Element tools or expertise required

Romax Gleason Data Exchange Interface

Data exchange between RomaxDESIGNER and Gleason GEMS enhances the design process by leveraging the strength of full drivetrain system analysis in RomaxDESIGNER and GEMS’ detailed analysis of bevel and hypoid gears, ultimately leading to increased durability, efficiency and improved NVH characteristics.

  • Bevel and hypoid gear geometry from GEMS can be imported into RomaxDESIGNER
  • Load case data and accurate predictions of misalignments from RomaxDESIGNER can be imported into GEMS to be used in the detailed contact analysis
  • Transmission error and stress results from GEMS can be loaded into RomaxDESIGNER for viewing and for use in the NVH analysis
  • The accurate misalignment information from RomaxDESIGNER allows for better and more detailed optimisation of gears in Gleason GEMS for increased durability and efficiency
  • The transmission error calculated in GEMS can be used as an excitation in RomaxDESIGNER, enhancing the accuracy of NVH predictions

For more info on Gleason GEMS, click Here...

Effect of lubricant and friction on gear shear stress

Consider the effects of friction forces on subsurface stress during gear contact – an important result for selecting appropriate surface treatment and lubricant additives

  • Includes consideration of slip velocity, lubrication condition, surface roughness, oil dynamic viscosity to predict “combined” shear stress for gears
  • Improvements in accuracy of prediction of shear stress magnitude and depth
  • Additional subsurface shear stress plots that account for friction forces

And Many More


  • Define milled root geometry for cylindrical gears
  • Export milled gear profile for manufacturing equipment
  • Variable friction coefficient
  • Film thickness calculation
  • Additional micro geometry results
  • Enable use of plastic gear materials


  • Improved interface with ANSOL HypoidFaceMilled and HypoidFaceHobbed for gear contact analysis
  • Improved modelling of non-parallel gear shaft arrangements