Gears and transmission
Vertical Double Rack and Pinion Lift (Exploded Assembly)
- Bounding box
- 1032.2 × 80.0 × 128.5 mm
- Engine
- Precision B-rep
- Parameters
- 34
- Published
- November 4, 2026
Download
Free to download and use. See the terms.
The prompt
Create a functional 3D-printable vertical Double Rack and Pinion mechanism controlled by an ESP32 and one SG90 180° servo motor. **Main specifications:** - Two parallel vertical rack gears. - Two identical pinion gears. - Both racks must move UP and DOWN simultaneously in the SAME direction and at the same speed. - Maximum travel: 50 mm. - Payload: 5 grams. - Base: 140 × 80 × 6 mm. - Rack length: 110 mm. - Gear module: 0.5, pressure angle: 20°. - Pinions: 72 teeth, 36 mm pitch diameter, 5 mm thickness. - One common horizontal shaft connecting both pinions. - Two linear guides. - One moving platform: 60 × 35 × 4 mm. - SG90 servo mounting bracket. **Mechanical design:** Mount both pinions on the same shaft, each engaging its own rack. Connect both racks to one rigid moving platform to guarantee synchronized vertical movement. Support the shaft with bearings and connect the servo through a suitable coupling or transmission. **Motion:** Design for approximately 50 mm vertical travel, with upper and lower mechanical stops. Verify actual servo rotation and gear geometry before manufacturing. **CAD assembly:** Create separate editable components, realistic mechanical joints, an exploded view, front/side/top views and a motion simulation. **Deliverables:** Complete editable 3D assembly, individual STL parts for 3D printing, STEP file and dimensioned technical drawings. Ensure correct gear meshing, synchronized movement in the same direction, no collisions and practical 3D-printing clearances. Generate a mechanically functional design, not just a decorative model.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Length | 140 mm | 80 – 220 |
| Base Width | 80 mm | 50 – 140 |
| Base Thickness | 6 mm | 3 – 12 |
| Mounting Hole Dia | 3.2 mm | 2 – 5 |
| Gear Module | 0.5 mm | 0.3 – 1.5 |
| Pressure Angle | 20 deg | 14.5 – 25 |
| Rack Length | 110 mm | 70 – 180 |
| Rack Face Width | 5 mm | 3 – 12 |
| Rack Body Depth | 3 mm | 1.5 – 8 |
| Rack Tooth Height | 1.1 mm | 0.6 – 3 |
| Rack Tooth Count | 32 teeth | 10 – 60 |
| Printed Backlash | 0.2 mm | 0 – 0.4 |
| Pinion Teeth | 72 teeth | 20 – 100 |
| Pinion Face Width | 5 mm | 3 – 15 |
| Shaft Bore Diameter | 6 mm | 3 – 12 |
| Shaft Diameter | 6 mm | 3 – 12 |
| Shaft Length | 100 mm | 50 – 180 |
| Coupling Length | 15 mm | 8 – 30 |
| Coupling Outside Dia | 12 mm | 8 – 25 |
| Bearing Block Size | 12 mm | 8 – 25 |
| Bearing Block Height | 10 mm | 6 – 20 |
| Linear Guide Length | 110 mm | 70 – 180 |
| Linear Guide Width | 12 mm | 6 – 25 |
| Linear Guide Depth | 8 mm | 4 – 18 |
| Platform Length | 60 mm | 40 – 120 |
| Platform Width | 35 mm | 20 – 80 |
| Platform Thickness | 4 mm | 2 – 10 |
| Servo Body Length | 23 mm | 15 – 40 |
| Servo Body Width | 12 mm | 8 – 25 |
| Servo Body Height | 29 mm | 18 – 45 |
| Bracket Length | 35 mm | 22 – 60 |
| Bracket Width | 20 mm | 12 – 40 |
| Bracket Height | 30 mm | 18 – 50 |
| Explode Gap | 45 mm | 10 – 120 |
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.
More models
Browse the full gallery →Spur Gearbox
design gearbox
Involute Spur Gear with Keyway
Precision Involute Spur Gear with Hub and Keyway: Module (m) of 2.0 mm, 40 teeth (z), Pitch Circle Diameter (d) of 80.00 mm, 20° pressure angle (\alpha), 15.00 mm face width (b), a
Parametric Helical Gear
Create a parametric helical gear with the following specifications: 32 teeth, normal module of 3 mm, right-hand helix, total face width of 80 mm, and a central bore hole with a dia
Rod with Spur Gear
Metal rod diameter is 20 mm and length is 100 mm and right side attach a gear and their OD is 50 mm
Spur Gear (12 Teeth)
Built a gear with 12 teeth
Two-Stage Spur Gear Reduction Assembly
Design a 2-stage spur gear reduction set for 3D printing with an overall 10:1 ratio. Stage 1: A 12-tooth pinion driving a 36-tooth gear (3:1). Stage 2: A 12-tooth pinion coupled