Modules

Each module: what it is for, its inputs, what it calculates and how to read the results.

Project overview The overview page sums up the open project: the assembly in 3D, the checks closest to their limits with suggested fixes, what changed since the last save, every component's utilisation, the power flow of a gearbox, the duty cycle, the warnings, the parts list and the totals.
Assembly in 3D The whole project in one 3D view: every shaft where its gear pairs and drives put it, the gears in mesh, the bearings at their supports and the housing walls, coloured by their checks.
Shaft Build a stepped shaft from sections, place supports and loads, and read its deflection, bending moment, stress, support loads and tilt.
Shaft strength (DIN 743 and FKM) Fatigue and static safety of the shaft at shoulders, notches and its weakest plain sections, after DIN 743 or the FKM guideline.
Critical speeds and vibration Bending critical speeds and mode shapes, gyroscopic whirl and the Campbell diagram, unbalance response, and torsional and axial modes of the shaft.
Bearings Rolling bearings on their own or on a shaft support: load distribution, contact stress, ISO 281 rating life, static safety, lubricant film, friction, thermal speeds and stiffness.
Housings (seat stiffness) How stiff a bearing seat is in a housing wall, from a plane-stress plate, a 3D solid with hub and ribs, or an imported FE mesh or reduced matrix, and how that stiffness acts on the shaft.
Gear pairs Rate external and internal spur and helical gear pairs by ISO 6336: geometry, load factors, pitting and tooth root safety, scuffing, load spectra, flank modifications and loaded tooth contact, and the mesh forces on a gearbox's shafts.
Planetary sets Rate a simple planetary stage of sun, planets and ring by ISO 6336 per mesh: ratio, load sharing, planet speed and pin load, assembly and neighbour checks, and the face load factor from a deforming carrier.
Bevel pairs Rate straight, skew, spiral and Zerol bevel gears without hypoid offset by ISO 10300-1 and -2: cone geometry, shaft forces, virtual cylindrical gears, load factors, pitting and tooth root safety.
Worm pairs Rate a cylindrical worm drive with a steel worm and a bronze or cast iron wheel by DIN 3996 method C: efficiency and losses, wear, pitting, root safety of the worn tooth, worm deflection and oil temperature.
Plastic gears Rate cylindrical gears of POM, PA66, PA66 GF30 or PEEK by VDI 2736: flank and root temperatures from the heat balance, root and flank safety with the strength at temperature, wear and tooth tip deformation.
Fits and press fits ISO 286 limit deviations and clearances for a hole and shaft pair, and the elastic press fit of a hub on a shaft after DIN 7190-1: pressure, transmissible torque, stresses and shrink temperature.
Keys and splines Parallel keys after DIN 6892 with DIN 6885-1 key sizes, and involute splines after DIN 5480 and ISO 4156: flank pressure on shaft, hub and key, tooth shear and torque capacity.
Bolted joints Single-bolt joints after VDI 2230-1:2015, steps R0 to R13: preload and tightening torque, load factor, embedding, and safeties against yield, fatigue, surface pressure, slipping and shearing.
Weld groups Fillet, full- and partial-penetration butt weld groups in one face plane after EN 1993-1-8, with throat stresses by the directional or simplified method and fatigue over a load spectrum after EN 1993-1-9.
Belt and chain drives Couple two shafts with a V-belt, flat belt, timing belt or roller chain: strand tensions, pretension and slip, the shaft load and its direction, and the torque on both shafts.
Electric motors (rotor magnetic pull) The rotor of an electric machine on its shaft: unbalanced magnetic pull as a negative spring, its effect on bearing loads, deflection and critical speeds, and the air-gap and stability checks.
Linear guides Profile rail guides after ISO 14728: the table load shared over the carriages, equivalent loads with moments, rating life in km and hours, and static safety.
Ball screws Ball screws after ISO 3408-5 and ISO 3408-4: rating life over a load spectrum with nut preload, static safety, critical speed, buckling, d·n, efficiency and torque, and an optional ball-by-ball model of the nut.
Helical springs Cylindrical helical compression, extension and torsion springs of round wire after EN 13906: rate, forces, stresses, solid length, buckling, hook stresses, initial tension and fatigue.
Hertzian contact Two bodies pressed together: the contact ellipse or line, the pressure, the approach and stiffness, and the stresses below the surface, with live sliders, stress maps and a 3D view.
Reports and export The calculation report: its pages as they print, the parts and modules it contains, its look and header, PDF and print; and export the shaft as STEP or DXF and gears as STEP, from the app or the command line.