• ISO 6336
  • AGMA 2001-D04
  • DIN 3990

Precision Gear Design. ISO 6336 Native.

Calculated to standard.

Desktop software for spur and helical gear design. Full ISO 6336 strength rating. Designed by the engineer who signs the inspection report.
ISO 6336-1/2/3
AGMA 2001-D04
DIN 3990
Cylindrical gears
Spur · Helical
GUM uncertainty
PyQt6 desktop
free trial 30 days
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TECHNICAL FOUNDATION

ISO 6336

Pitting resistance Tooth bending strength

AGMA 2001

Comparative output on every calculation

10⁻⁴ mm

Metric precision GUM uncertainty model

DIN 3990

Reference standard normative context

PyQt6 desktop

Windows · Linux

60 Hz live mesh

Real-time kinematics

Local execution

Activation via secure server

Validated

Against normative examples

Spur · Helical

Cylindrical gears

The problem with current tools

KISSsoft costs €12,000/year.
Excel has no normative backbone.
There was no middle ground.

Individual mechanical engineers and consultants are priced out of enterprise software — and forced to rely on spreadsheets with no normative context. One wrong $K_A$ propagates silently through every result.

Cost barrier

KISSsoft, MASTA, and Romax are priced for OEM procurement budgets — €12,000 to €40,000 per seat per year. An independent engineer or small consultancy cannot justify that cost.

€12k+/year → out of reach

No normative rigor

Spreadsheets carry no normative context object. A single incorrect $K_A$ or $Z_E$ propagates silently through every downstream result — with no audit trail and no standard to reference.

Silent errors → no audit trail

Iteration speed

Manual ISO 6336 iteration — adjusting x₁, x₂, β, $K_A$ across a full factor chain — takes hours per design cycle. QEVORK closes the loop in seconds, with full coefficient visibility.

Hours of iteration → seconds

Join the waitlist

$59/mo after trial · Cancel anytime

What Qevork does

Every calculation. Every factor. No shortcuts.

From basic geometry to full ISO 6336 strength rating and real-time mesh kinematics — in a single desktop application.

TIER 1 — METROLOGY

Full ISO 6336 geometry

Complete involute geometry for spur and helical gears — diameters, contact ratio, active profile, tip relief geometry, and ISO 1328 quality grades.

$m_n$

z

β

x

$α_n$

$ε_α$

d

$d_a$

$d_b$

$d_f$

TIER 1 — METROLOGY

$S_H$ and $S_F$ strength rating

Pitting resistance and tooth bending strength per ISO 6336-2 and -3. Full factor chain — no lumped coefficients, no hidden assumptions.

$Z_H$

$Z_E$

$Z_ε$

$Z_β$

$K_A$

$K_v$

$K_Hβ$

$K_Hα$

TIER 1 — METROLOGY

60 Hz real-time mesh visualization

Live involute tooth profile and gear mesh rendered at 60 Hz. Hobbing simulation, active contact zone, and profile deviation diagrams — updated on every input change.

Involute

Contact patch

Hob simulation

$f_Hα$ · $f_Hβ$

TIER 2 — DESIGN

AGMA 2001-D04 comparative report

Side-by-side ISO 6336 and AGMA 2001-D04 output on every mating pair calculation. Normative context object enforced — no coefficient cross-contamination between standards.
 

$Z_W$ · $C_H$

$Y_J$ · J

$S_H$ · $S_F$

PDF export

TIER 3 — DYNAMICS

TCA and Transmission Error analysis

Tooth Contact Analysis with 3D contact patch map and Transmission Error spectrum. Identify loaded contact shift, edge loading, and TE harmonics before the gear is cut.
 

TCA 3D

TE spectrum

$K_Hβ$ loaded

Edge load factor

TIER 3 — DYNAMICS

Profile shift optimizer and CAD export

Automated x₁/x₂ optimization for target S_H/S_F balance. Tip relief Ca/Cf calculation. Full geometry export to STEP, IGES, DXF, and PDF manufacturing drawing.
 

x₁ · x₂

Ca · Cf · Cβ

STEP · IGES

DXF · PDF

How It Works

STEP 01

Download

Install the desktop app.

STEP 02

Input gear data

$m_n$, z, β, x, material, $K_a$.

STEP 03

Calculate

Full ISO 6336 strength.
Instant results.

STEP 04

Visualize

Tooth profile, hobbing plot, safety factors.

Three tiers. Zero overlap. Priced to the physics you need.

Tier 1 - T1

METROLOGY

Single-gear geometry, simplified strength analysis, dimensional tolerancing, reverse engineering via CMM, and manufacturing data sheet — the complete deterministic foundation for anyone measuring and specifying an isolated gear.

  • Single gear calculation
  • Spur + helical gears
  • ISO 6336 simplified strength
  • Manufacturing data sheet (dimensions over pins/balls, span measurement)
  • ISO 1328-1 tolerance grading

US$59

/mo

US$ 708 / year

Coming soon
Tier 2 - T2

DESIGN

Everything in T1 + gear pair, helical gears, full ISO 6336, micropitting, wear, power loss/efficiency, multi-stage gearbox, PDF report, and technical drawing — the complete design engine.

  • Everything in METROLOGY
  • Mating pair calculation
  • ISO 6336 full strength analysis
  • AGMA 2001-D04 comparative report
  • PDF report

US$249

/mo

US$ 2.490 / year

2 months free

Notify at Launch

Coming soon

Tier 3 - T3

DYNAMICS

Everything in T2 + real-time multibody dynamic simulation, 3D loaded TCA, transmission error, tip relief, Campbell diagram, and numerical/2D export — the only tier with dynamic contact physics.

  • Everything in DESIGN
  • TCA + TE
  • Tip Relief optimizer
  • Mating pair
  • STEP / DXF / JSON

US$499

/mo

US$ 4.990 / year

2 months free

Notify at Launch

Coming soon

Check out all the features

Payment can be made in up to 12 installments.

From the builder

BUILT BY A PRACTITIONER

"I designed gears professionally and inspected them to ISO standards. I built Qevork because the tools available were either too expensive or too imprecise. Every calculation in this software is validated against normative examples."

Latest from the blog

21/08/2026
Time 21 min read

ISO 6336 vs AGMA 2001-D04: Why the Same Gear Returns Different Safety Factors

The same gear pair calculated under ISO 6336-2:2019 and AGMA 2001-D04 returns different $S_H$ values. A factor-by-factor comparison showing where and why the two standards diverge — and by how much.
READ MORE

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07/07/2026
Time 31 min read

ISO 6336 Tooth Bending Strength: The Complete $S_F$​ Calculation Walkthrough

A complete derivation of the ISO 6336-3:2019 tooth bending safety factor $S_F$ — including $Y_F$ from tooth root geometry, $Y_S$ stress correction, $Y_ST$ = 2.0 and why it exists, $Y_B$ rim thickness, $Y_DT$ double tip loading, and the five errors that corrupt bending calculations in practice. Method B, external cylindrical gears.
READ MORE

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07/07/2026
Time 26 min read

ISO 6336 Pitting Resistance: The Complete $S_H​$ Calculation Walkthrough

A complete, factor-by-factor derivation of the ISO 6336-2:2019 contact safety factor $S_H$ — including $Z_B$/$Z_D$, $Z_NT$ for long life, the $Z_W$ asymmetry, and the three calculation errors that appear in practice. Method B, external cylindrical gears.
READ MORE

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EARLY ACCESS · FREE TRIAL

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Tier 1 — Metrology · 14-day free trial

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