Gears and transmission
Dual-Stage Spur/Helical Gear Block
- Bounding box
- 14.0 × 14.0 × 6.0 mm
- Engine
- Precision B-rep
- Parameters
- 9
- Published
- August 27, 2026
Download
Free to download and use. See the terms.
The prompt
Create a 3D model of a dual-stage plastic spur/helical gear block (coaxial composite gear) for 3D printing. General dimensions: - Total height: 6.0 mm - Central bore diameter (inner hole): 2.15 mm (smooth tight-clearance fit for a 2.0 mm shaft) Stage 1 (Top small gear): - Type: Spur gear (straight teeth) - Number of teeth (Z1): 10T - Module (m): 0.5 - Outer diameter: 6.0 mm - Face width (height): 3.0 mm Stage 2 (Bottom large gear): - Type: Helical gear - Number of teeth (Z2): 33T - Normal Module (mn): 0.4 - Helix Angle (beta): 19.5 degrees - Helix Direction: Left-Hand (LH) - Outer diameter: 14.0 mm - Face width (height): 3.0 mm Design details: Both gears are perfectly coaxial and share the same central bore. Stage 1 sits directly on top of Stage 2. No chamfers or fillets on teeth edges. Output as a clean manifold STEP or STL file.
Parameters
| Name | Value | Range |
|---|---|---|
| Stage 1 teeth (Z1) | 10 | 5 – 30 |
| Stage 1 module | 0.5 mm | 0.2 – 2 |
| Stage 1 face width | 3 mm | 1 – 10 |
| Stage 2 teeth (Z2) | 33 | 10 – 60 |
| Stage 2 module | 0.4 mm | 0.2 – 2 |
| Stage 2 face width | 3 mm | 1 – 10 |
| Helix angle (negative = LH) | -19.5 deg | -45 – 45 |
| Pressure angle | 20 deg | 14.5 – 25 |
| Central bore diameter | 2.15 mm | 1 – 5 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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