Gear dynamicsSpin-off of Politecnico di Torino

Precision isdesigned.

Size, rate and optimise your gear transmissions, dynamics included, before the prototype.

LoA · Line of action: The orange line in the drawing: the path along which the teeth of the two wheels touch and push each other.
TE · Transmission error: The gap between real and perfect motion, a few micrometres: the first source of gear noise and dynamic overloads.
GeDy TrAss: Computes it quickly for every micro-geometry: try many designs and pick the one with the lowest error and the longest life before the prototype.

Why we exist

Calculation, CAD, FEM, prototype. One sizing mistake, or a problem with vibration or wear, and you start all over again. We bring dynamics into the design phase, when changes still cost little.

Lab · Try it yourself

A few micrometres make the difference.

The dynamic factor tells you how far the tooth force rises above the static force as speed changes. With the right tip relief the resonance peak almost disappears: lower tooth loads, less wear, backlash that grows more slowly. GeDy TrAss helps you design your transmissions to improve these figures.

Unmodified: peak 3.23 at 15,800 rpm
With 20 µm of tip relief: peak 1.13 at 5,600 rpm
Peak overload: −94 %

Open the lab

In the lab: tooth force over time, the effect of torque and relief, transmission error and sound.

With 20 µm of tip reliefUnmodified

What we do

Three ways to work with us

A tool, a team of engineers, a training path: for every phase of transmission design.

S.01 · SaaS platform

Design gears 10 times faster

A cloud platform built on patented numerical methods: from requirement to validated design, with sizing, rating to standards and dynamics computed during design. It plugs into your existing CAD / CAE workflows.

01Geometry
02Rating
03Layout and profile
04Dynamics

Screenshot of the GeDy TrAss platform: on the left the form for a shaft with material, position and nodes, on the right the 3D view of two meshing gears on their shafts. — The GeDy TrAss platform: shaft editor and 3D view of the gear layout.

S.02 · Consulting

Analysis and design, alongside your engineering team

01Design and sizing
02Tooth profile and micro-geometry
03Durability and failure analysis
04Gear dynamics and vibration
05Structural dynamics
06Validation and bench tests

Discover consulting

S.03 · In-house training

Standards and method, taught by researchers

StandardISO 6336: cylindrical gears
StandardISO 10300: bevel gears
MethodDesigning a transmission
MethodMicro-geometry and gear dynamics

Discover the courses

10×: faster: model in minutes, dynamic analysis in hours instead of days.
80%: less computing time than FEM in contact analysis, at best.
>100: projects simulated to validate the software.
21: scientific publications behind the method.

Fields of application

Wherever a gear turns.

Gears are everywhere power has to be transmitted with precision. These are the main fields where our methods apply.

Marine propulsion
Rail traction
Energy, Oil & Gas
Aeronautics and aerospace
Machine tools and automation
Coordinate measuring machines
Paper machines
Plastics extruders
Mechanical and hydraulic presses
Injection moulding machines

And wherever a transmission has to stay accurate, durable and reliable over the years.

From the solver

Dynamics you can see before the prototype exists

Scroll sideways to see all the simulations.

Fig. 01Contact pressure along the tooth flank
Fig. 02Component displacements in a gearbox
Fig. 03Virtual model of a complete gearbox
Fig. 04Modal analysis of the housing

Origin

Born in a lab. Built for production.

The method comes from years of research on high performance components with automotive and aerospace companies, in the DIMEAS department of Politecnico di Torino.

2017The research group is born in DIMEAS, Politecnico di Torino.
2018Pre-incubated in I3P. Among the six best start-ups in Piedmont and Aosta Valley.
2019Innovation 4.0 prize at Automation & Testing. GeDy TrAss S.r.l. is founded in May.
2020Recognised as a Politecnico di Torino spin-off in January. The test bench for the static transmission error is presented at SAE.
2022-24The methods are published in Nonlinear Dynamics, Vibration and at ASME IDETC and SEM IMAC. In 2024 we take part in MOVE in London.
2025The software becomes a web platform. Talk “From Bit to Bulk” at City Tech, CUNY, in New York.
TodayAccess requests for the SaaS platform are open at app.gedytrass.com. In 2026 we pitched at Access 2 Finance and took part in the ePowertrain Tech Summit and Wave by Vento.