Rotating Gear Train

Category: Animation & Motion GraphicsLevel: IntermediateAnimation · 124,390 triangles

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A train of seven brass, steel and copper gears on an aluminium plate, driven by the pinion of a small electric motor. Every gear is linked with the correct tooth-count ratio through drivers, including two compound gears sharing an axle, and the 5-second clip loops seamlessly because every gear returns to its original tooth position.

Animation clip rendered in Blender from the project file.

Project info

CategoryAnimation & Motion Graphics
LevelIntermediate
ToolBlender 5.2.3 · Cycles
TypeAnimation
Price (one price)US$80

In the scene: Seven gears (36, 24/12, 36/18, 27, 12 teeth) + motor pinion, aluminium plate, axles, nuts, electric motor, cable, spare gears, nuts and washers on a concrete workbench

Project file (.blend) downloadable after payment

The real project file is available. It is not just the picture and clip on this page: you get the working Blender scene with its objects, materials, lights and camera, plus the animation keyframes. It can be downloaded after payment, and we send the download link by WhatsApp or email.

ZIP: .blend + render + MP4 clip + Python script

What is inside the file

The original Blender project file (.blend) with the whole scene: objects, materials, lights and camera, ready to open and edit
The animation keyframes inside the .blend and the rendered MP4 clip
The 1920x1080 render (PNG)
The Python script that generates the scene plus its helper library (cid_lib.py), since the scene is built procedurally
A BACA-DULU.txt file listing the contents, the Blender version and how to use it
All packed in one ZIP file

Project file: The actual .blend project file (not just the picture) is available to download once payment is complete; we send the download link by WhatsApp or email
Payment: One price per project, paid in full upfront; the file is sent once payment is received
Tax: Prices exclude 11% VAT
Customisation: Adapting the scene, colours or your own product can be ordered separately via WhatsApp

Techniques used

Procedural gears (bmesh): tooth profile, rim, spokes, hub
Rotation drivers: rotB = -rotA x NA/NB + phase, teeth interlock
Compound gears on one axle (copy-rotation driver)
Perfect loop: driver rotation is a multiple of every gear pitch
Bevel + Weighted Normal modifiers for metal edges
Metal shaders with noise tarnish and varying roughness
Cycles, interior HDRI + three area lights, DOF focused on gear B

How it was made

1Choose the module and tooth counts, compute centre distances r1 + r2
2Build tooth profile and rim with bmesh, add bevels
3Add ratio + phase drivers so teeth fill each other's gaps
4Compute the driver rotation so the clip loops without a jump
5Add plate, axles, nuts, motor and small props on the table
6Set area lights, 55 mm camera with DOF, render the Cycles clip

Scene statistics

Polygons (triangles)124,390
Objects58
Materials8
Lights3
Render engineCycles
Samples40
Render time5 min 38 s
Frames120 @ 24 fps (5.0 s)

Modifiers in the scene

Bevel
Weighted Normal

Figures are read from the scene by Blender 5.2.3 LTS; the render time is for the poster frame and the whole clip on one RTX 4060 GPU.

Price and ordering

US$80

One price for the whole project file, excl. 11% VAT

Order the file via WhatsApp

Frequently asked questions

Do I get the real .blend file?

Yes. The picture and clip on this page are only previews. After payment we send the download link of the real project file (a ZIP containing the .blend scene, the render, the MP4 clip, the Python script that generated it and a BACA-DULU.txt note) by WhatsApp or email.

Which Blender version do I need?

The file was made in Blender 5.2.3 LTS. Open it with Blender 5.2 or newer; no add-ons or external textures are needed.

How was the scene made?

The scene was built procedurally with a Python script in Blender (modelling, materials, lights and camera), then rendered in Cycles. The script is included in the ZIP, and the .blend already holds the finished scene, so you can edit it like any other Blender file.

Can you adapt it to my product or design?

Yes, as a separate order. Message us on WhatsApp with a short description of what you want changed.

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Images and clips are real Blender renders of the project files. Blender is a trademark of the Blender Foundation.

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Project file (.blend) downloadable after payment

ZIP: .blend + render + MP4 clip + Python script

What is inside the file

The original Blender project file (.blend) with the whole scene: objects, materials, lights and camera, ready to open and edit

The animation keyframes inside the .blend and the rendered MP4 clip

The 1920x1080 render (PNG)

The Python script that generates the scene plus its helper library (cid_lib.py), since the scene is built procedurally

A BACA-DULU.txt file listing the contents, the Blender version and how to use it

All packed in one ZIP file

Project file: The actual .blend project file (not just the picture) is available to download once payment is complete; we send the download link by WhatsApp or email

Payment: One price per project, paid in full upfront; the file is sent once payment is received

Tax: Prices exclude 11% VAT

Customisation: Adapting the scene, colours or your own product can be ordered separately via WhatsApp

Techniques used

Procedural gears (bmesh): tooth profile, rim, spokes, hub

Rotation drivers: rotB = -rotA x NA/NB + phase, teeth interlock

Compound gears on one axle (copy-rotation driver)

Perfect loop: driver rotation is a multiple of every gear pitch

Bevel + Weighted Normal modifiers for metal edges

Metal shaders with noise tarnish and varying roughness

Cycles, interior HDRI + three area lights, DOF focused on gear B

How it was made

1Choose the module and tooth counts, compute centre distances r1 + r2

2Build tooth profile and rim with bmesh, add bevels

3Add ratio + phase drivers so teeth fill each other's gaps

4Compute the driver rotation so the clip loops without a jump

5Add plate, axles, nuts, motor and small props on the table

6Set area lights, 55 mm camera with DOF, render the Cycles clip

Scene statistics

Polygons (triangles)124,390

Objects58

Materials8

Lights3

Render engineCycles

Samples40

Render time5 min 38 s

Frames120 @ 24 fps (5.0 s)

Modifiers in the scene

Bevel

Weighted Normal

Figures are read from the scene by Blender 5.2.3 LTS; the render time is for the poster frame and the whole clip on one RTX 4060 GPU.

Frequently asked questions

Do I get the real .blend file?

Which Blender version do I need?

The file was made in Blender 5.2.3 LTS. Open it with Blender 5.2 or newer; no add-ons or external textures are needed.

How was the scene made?

Can you adapt it to my product or design?

Yes, as a separate order. Message us on WhatsApp with a short description of what you want changed.

Rotating Gear Train

Project info

Project file (.blend) downloadable after payment

What is inside the file

Techniques used

How it was made

Scene statistics

Modifiers in the scene

Price and ordering

Frequently asked questions

Similar projects

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Bouncing Ball Squash & Stretch

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Rotating Gear Train

Project info

Project file (.blend) downloadable after payment

What is inside the file

Techniques used

How it was made

Scene statistics

Modifiers in the scene

Price and ordering

Frequently asked questions

Similar projects

Geometric Motion Graphics

Bouncing Ball Squash & Stretch

Newton's Cradle