Gears and transmission
Helical Pinion Z22 m1 beta20 with Clamping Hub
- Bounding box
- 25.6 × 25.4 × 14.0 mm
- Engine
- Precision B-rep
- Parameters
- 13
- Published
- November 11, 2026
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The prompt
Технический промт (Engineering Specification) Technical CAD specification for a custom plastic gear: 1. Gear Type & Geometry: · Type: Helical gear (cylindrical). · Number of Teeth (Z): 22. · Normal Module (m): 1.0 mm (standard). · Helix Angle (β): 20° (right-hand or left-hand to match mating gear). · Pressure Angle (α): 20° (standard involute profile). · External Diameter (Da): Approximately 25.4 mm (calculated as (m × Z) / cos(β) + 2m). · Face Width (Gear thickness): 4.5 mm. 2. Central Hub (Boss) Design: · Hub Type: Extended cylindrical hub, protruding significantly above the gear face. · Total Hub Height: 14 mm (from the root of the gear teeth to the top of the hub). · Hub Outer Diameter: 8 mm. · Slit (Kerf): A single vertical slit cut completely through one side of the hub wall, width 0.8 mm, extending from the top of the hub down to the gear face (designed for radial clamping/flexibility). 3. Bore / Shaft Interface: · Bore Shape: Square hole (with slightly rounded corners). · Bore Dimensions: 4.5 mm × 4.5 mm. · Bore Depth: Through-hole (all the way through the hub and gear face). 4. Marking & Material: · Marking: A solid, flat yellow sector (wedge shape) painted or molded onto the top face of the gear wheel, spanning approximately 90 degrees of the face between the hub and the teeth. · Material: Polyoxymethylene (POM / Acetal) or Nylon (PA6), matte finish, suitable for injection molding. 5. Style of Output: · Orthographic projection (top, front, side views) or an isometric CAD render. Clean white background, technical drawing style with dimension lines and callouts. No artistic lighting, pure geometric representation.
Parameters
| Name | Value | Range |
|---|---|---|
| Normal Module | 1 mm | 0.4 – 3 |
| Number of Teeth (Z) | 22 | 8 – 60 |
| Helix Angle (beta) | 20 deg | 0 – 45 |
| Face Width | 4.5 mm | 1 – 20 |
| Hub Outer Diameter | 8 mm | 4 – 20 |
| Total Hub Height (from gear root) | 14 mm | 5 – 30 |
| Square Bore Side | 4.5 mm | 2 – 12 |
| Bore Corner Radius | 0.6 mm | 0.05 – 1.5 |
| Clamping Slit Width | 0.8 mm | 0.3 – 3 |
| Marking Outer Radius | 9.5 mm | 5 – 14 |
| Marking Thickness | 0.3 mm | 0.1 – 1.5 |
| Marking Start Angle | 45 deg | 0 – 355 |
| Marking Sector Angle | 90 deg | 10 – 180 |
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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