PARAMETRIC · 3D · STEP
Internal Gear Generator
Enter module, number of teeth, outer diameter, and face width to generate a STEP file for an internal gear.
Pressure Angle
20°
Backlash
None
Tooth Form
Involute
🔍
View 3D Preview First
HOW-TO How to Generate an Internal Gear STEP File +
- Enter the module, number of teeth, outer diameter, and face width
- Calculated values update in real time as parameters change
- Click "Download STEP File" or "Preview STEP Model"
- If you selected "Download STEP File", the STEP file will be saved automatically
- If you selected "Preview STEP Model", check the 3D model, then click "Download STEP File" manually
SAMPLE
STATIC · DEFAULT-VALUE MODEL
CALCULATED · SPEC
AUTO-COMPUTED
D
80.00mm
Pitch Diameter
Da
76.00mm
Tip Diameter
Df
85.00mm
Root Diameter
t
7.50mm
Rim Thickness
PARAMETERS
Enter Dimensions
ABOUT · STEP
The STEP file (.step / .stp) is a standard 3D CAD format that retains dimensional and topology data. Compatible with major CAD software including Fusion 360, SolidWorks, and FreeCAD.
- Full-scale solid (mm units)
- Editable dimensions and post-processing in CAD
- Convertible with a slicer for 3D printing
FEEDBACK
BUG · REQUEST
0 / 500
- ↔️ Spur Gear Center Distance Calculator Calculate spur gear center distance and key dimensions from the module and two gear tooth counts
- 🪐 Planetary Gear Tooth Count & Assembly Calculator Calculate the ring gear tooth count and reduction ratio from the sun/planet tooth counts and number of planets, and check assembly conditions and interference (with CAD placement angles)
- ⚙️ Gear Ratio Calculator Calculate gear ratio, output speed, and torque from driver and driven tooth counts (multi-stage)