**Multi-stage compound gearbox with sequential gear reduction.**

The input gear with a radius of **4.75 mm** drives the first compound gear with a radius of **14.75 mm** on one side.

**_Each intermediate gear is a single solid part with two different radius:_**
- 14.75 mm on one side (driven side)
- 4.75 mm on the opposite side (driving side)

The large side of each compound gear is driven by the previous stage, while the small side drives the next stage.

This principle is repeated through all intermediate stages of the gearbox.

The first gear is a single 4.75 mm input gear, and the final gear is a single 14.75 mm output gear, without a secondary driving section.

**_All Paid STL's in 1 subscription_** - [https://patreon.com/ro_qd](https://patreon.com/ro_qd)

This design provides step-by-step speed reduction and torque multiplication in a compact and mechanically rigid structure.

With **_each stage, rotational speed is reduced by approximately 3.1×_**, while output torque increases accordingly.

The final large gear transfers motion to the central output shaft.

The gearbox is designed for smooth operation, stable alignment, and reliable power transmission.

Optimized for FDM 3D printing and DIY mechanical projects.

⸻

**Technical Specifications**

**_Gear radius:_**
- Input gear: 4.75 mm
- 3 compound gears: 14.75 mm / 4.75 mm (single-pieces)
- Output gear: 14.75 mm

**_Single-stage ratio:_**
- ~3.1 : 1

**_Multi-stage ratio (4 stages):_**
- ~93 : 1

**Recommended use:**
Robotics, camera rigs, motorized sliders, experimental mechanisms, custom automation.

**My projects:**
[My projects](https://roqd.one)

**Follow me on social media:**
[YouTube](https://www.youtube.com/@ro_qd)
[TikTok](https://www.tiktok.com/@rob.qd)
[Instagram](https://www.instagram.com/rob.qd)
[X](https://x.com/rob_qd)

MULTI-STAGE COMPOUND GEARBOX 93:1 | HIGH TORQUE SPEED REDUCER

GearBox.stl

Sometimes we humans need to build machines with the sole purpose of demonstrating the effects of gravity on a steel sphere. This is a machine that happily fulfills that purpose.   Be mesmerized by the combination of engineering and physics resulting from the simple motion of turning a gear.  Watch as the steel ball bearings gain potential energy as they're being lifted by the big wheel, only to be converted to kinetic energy as they roll around the well and tumble back to the bottom.  Be amazed by the fact that this whole thing is 3D Printed.

This download includes all of the STL files needed to print your own Gravity Well desk sculpture and requires no additional tools for assembly. This piece will bring you some needed meditation reminding you that there is order in the universe after all.

You will need to purchase 1/2" ball bearings (or 12-12.5mm) which can be found here:
https://geni.us/halfinchBallBearings 


Recommended print settings:
Layer Height: 0.2mm (All Parts except Well) | 0.1mm for Well 
Nozzle: 0.4mm

The largest file size is the dish, which is 205mm x 205mm.  All the files have been pre-oriented to save you some set up time. 

The Gravity Well

Base.STL

This is a fully functioning 3D printed grandfather clock.  Using mainly 3D printed parts, this clock was specifically engineered to be assembled in minutes, and can run for over 6 days on a single winding. With a little bit of tuning, it can accurate keep time with that classic tick-tock sound.

The video below shows how easily this clock can be assembled 

**The STL File:**

Prints on all standard 3d printers without supports, requires the following additional parts to assemble:

- 21 M4x12| 11 M4x20 Screws (https://amzn.to/3zgQb8f)
- 23 M4 Washers (https://amzn.to/3E1crFU)
- 17 624Z 13mm OD/4mm ID Bearings (Like these https://amzn.to/3DtUUpH)
- 1mm Nylon String or Fishing Line (I used string from this set https://amzn.to/3DtUUpH)
- 5 pounds of weight - could be ball bearings or a dumbbell (I used one from this set https://amzn.to/3zfVKUy)

**Recommended print settings:**

Layer Height: 0.2mm
Nozzle: 0.4mm
Infill: 15-20% 
Material Required: ~650g (Printed in PLA)
Minimum Build Plate Required: 180x180mm


**All the files have been pre-oriented to save you some set up time! All you need to do is drop the parts into your slicer and hit print!

The 3D Printed Wall Clock

0 Entire Part Layout (For Planning).stl

A fully 3D printable version of The Toronto Strandbeest, inspired by the huge one I made for a Youtube video (See below).

Based off the original invention by Theo Jansen, the Strandbeest is a mechanical walking creature that harnesses the power of the wind.  This particular version uses a large 3D printed rotor at the back.  The power from the wind is transferred through a gear box and to the main shaft that drives each leg module.

The Toronto Strandbeest is capable of walking completely on its own.  It can also sit comfortably on its display stand (included in the STL package) so you can watch the walking mechanism do it's thing!

The STL File:
Prints on all standard 3d printers, requires no additional tools or assembly, and assembles in seconds.

This video below shows you how to assemble this beest!

Full Parts list is included in the read-me file to make it easier for you to organize your prints.

**Recommended print settings:**
Layer Height: 0.2mm
Nozzle: 0.4mm
Infill: 15-18% 
Total Material: ~300g
Min. Bed Size: 180x180mm

**All the files have been pre-oriented to save you some set up time! All you need to do is drop the parts into your slicer and hit print!


The Toronto Strandbeest

Crank Gear.STL

**_THE ACTUAL FILES ARE LOCATED IN THE ZIP FOLDERS. _**
This is the Gear Rhombo & Gear Rhombo Junior (Jr.) (the Spirit of Mini Gear Sphere). This is totally redesigned from the Gear Sphere by TNTBA. 
With this purchase you get:
1. 3MF and STL files for all parts (Gear Rhombo & Gear Rhombo Jr)
2. X1 Carbon & A1 Mini layouts
3. License to print and sell this model - Forever!

**For Gear Rhombo:**
UPDATE June 9th, 2024: New clips have been added to provide the option of having a tight gear Rhombo or a smooth gear Rhombo. The new clips allow for smoother manipulation and play with the gears which people may enjoy more. 
[TRY IT BEFORE YOU BUY IT](https://makerworld.com/models/523227)
Print time is approximately 6 hours. 
Approximate size of the Gear Rhombo is 122mm x 122mm x 116mm

Gears and Core can be printed in any material of your choice. 
Clips SHOULD be printed in PETG. 
Tool is not required for installation 

**For Gear Rhombo JR:**
UPDATE June 9th, 2024: New clip tool has been added to the file to allow for easier assembly. 
This Gear fidget toy is a lot of fun and is now portable. 
[TRY IT FOR FREE BEFORE YOU DECIDE TO BUY IT!](https://makerworld.com/en/models/502042#profileId-417207)
Approximate size of this design is: 50mmx50mmx50mm. 

The time to print and fully assemble is approximately 1 hour and 15-30 minutes. 

Gears and core may be printed in any material. 
Clips should be printed in PETG. 
Tool can be printed in PLA. 

Place the clip into the tool and use the tool to place the clips directly into the holes of the gears. Make sure you go directly into the hole to avoid splitting, breaking, or over-bending the clips. I would recommend that you print out additional clips to ensure you have extras when you mess up. 

Once the clips are installed, you can place the gears following the numbering located on each gear and core side.
[Still having issues? Please watch this assembly video!](https://youtu.be/2Pm82ce2iZk)

The mechanism to move this toy fidget was inspired by [RuvenBals' Gear Ball ](https://thangs.com/designer/RuvenBals/3d-model/Gear%20Ball-1069853) and [Emmett's Gear Cube](https://www.thingiverse.com/thing:10483). 

Enjoy!

Gear Rhombo & Gear Rhombo JR by TNTBA

Fully Assembly + Parts for viewing.3mf

Gear Rhombo v1 (VIEW ONLY - not for print).3mf

SMOOTH PETG clips.3mf

clip tool v2.3mf

This box was born as a special collaboration between me and [3D Printing World](https://thangs.com/designer/3dprintingworld), where I sculpted the Magnolia flower on top and he designed the mechanical box.

This box is an outcome of a special request for a marriage proposal of a great member of the 3D Printing Community.
**Caleb**, the producer and costar of [HotMakes](https://youtube.com/@HotMakesLive?si=8Z-TZeVbEQwuodcW) wanted a mechanical ring box that somehow incorporates his girlfriend (now fiancés) favorite flower, the magnolia.
- - -
This type of mechanism **3D Printing World** created is perfect for a magnolia since the number of petals on the flower line up perfectly with 60 degrees.
Each of the six petals on top are connected to an outside ring gear and an inside torsion loaded spring gear.
When you hold the box and rotate the ring gear the pedals open. When you let go of the gear, the spring loaded gear forces the pedals to come together.

_**The bottom of the box prints in place.**
Use a .4mm nozzle and .2mm layer heights or smaller. You will need to print three double pedals and three single pedals. You will also want to print the shim which will help to glue the pedals squarely onto the shafts. None of the parts require supports. **There is also 3MF files for dual color pedals.**_

_The top petals glue onto locators on the top of each shaft to glue it together.
Make sure you alternate between single and double pedals.
**See the assembly video for assembly instructions.**_
- - -
Much thanks to **3D Printing World** for creating this brilliant and magical mechanism that makes the box so unique, without which the magic would not have been possible.
You can also download these files from **3D Printing World**. Please support him [here](https://than.gs/u/35786?plans=true)
- - -

**If you have any questions or inquieries about the files, if you have any suggestions and requests, or anything else, please don't hesitate to let me know!**

- - -

Please don't be shy and upload your make!

(_If you share it on your socials, please be sure to tag : @randomizy.3d [FB / IG] ; @randomizy3d [Twitter / Tik Tok] so that I can see it!_)

- - -
**Check out the amazing 3D Printing World profile here**: https://than.gs/u/35786
- - -

**INSTAGRAM:** https://www.instagram.com/randomizy.3d/

**TWITTER:** https://twitter.com/Randomizy3D

**FACEBOOK:** https://www.facebook.com/randomizy.3D

**Check More Here:** https://linktr.ee/Randomizy

- - -
_If you like my work and would like to support me so that I can bring you new content, receive exclusive benefits and you're interested in having a commercial license for selling 3D Printed items (not files) of my works, please do consider joining my Membership here:_ https://than.gs/u/296962?plans=true

Magnolia Box

TOP-2.stl

Magnolia Box (3 colors) (2 plates).3mf

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_Thank you for visiting my page! If you can, please consider supporting my art with a [subscription](https://than.gs/u/1514642?plans=true). Members will unlock ALL of my designs as well as the commercial rights to sell physical prints for as long as they are members._

_I also invite you to join my Discord channel, whether you're a reseller or a fan. You'll find a dedicated space where you can communicate directly with me and other members:
https://discord.gg/pUW67mEFrb_

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The Skeleton Version of the automata tapping hand, just for members

Video tutorial: https://www.youtube.com/watch?v=lFiVCcCdTiI 

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**REMEMBER THAT ALL MY FILES ARE PROTECTED BY A CC LICENSE AND ARE NOT INTENDED FOR COMMERCIAL PURPOSES UNLESS YOU HAVE [SUBSCRIBED TO A MEMBERSHIP PLAN ON THANGS](https://than.gs/u/1514642?plans=true) - IF YOU USE MY 3D FILES FOR COMMERCIAL PURPOSES, YOU HARM MY WORK AND MY COLLABORATORS - DON'T DO IT!**

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3D Model done with Rhino8: https://www.rhino3d.com/ 

_How do I take such high-quality photographs?
Here's my equipment:_

_Camera: https://amzn.to/3RPDj2c_
_Lightbox: https://amzn.to/4btNvV0_
_Tripod: https://amzn.to/3L51fuT_

Tappin Hand Skeleton Version (Members only)

Human_Base.stl

Some may call it the trippiest thing to come off of a 3D Printer since the conception of 3D printing. The Exploding Circle, previously existing only as a 3D rendering in the world of the YouTube, has been brought to the real (simulated) world.  After repeatedly kicking the behind of its creator, the gears have aligned. Once every 2pi radians, the segments of the circle come together, only to re-explode as the crank keeps spinning.

The Exploding Circle engineered kinetic sculpture is a mesmerizing example of how you can use spur gears, bevel gears, and planetary gears to create interesting motion.

This download includes all of the STL files needed to 3D print your own Exploding Circle sculpture and requires no additional tools for assembly. WD-40 or another type of lubricant is recommended for smooth operation.

This Video shows you how easy it is to assemble!

Recommended print settings:

Layer Height: 0.2mm
Nozzle: 0.4mm
Infill: 15-18% 
Total Filament: ~0.47 kg
Largest Part Size on Bed: 200x200mm
Tallest Part: 106mm

**All the files have been pre-oriented to save you some set up time! All you need to do is drop the parts into your slicer and hit print!  This download includes pre-arranged layouts for 205x205 (or larger) beds for easier printing!

The Exploding Circle

Build 1.stl

This is one of my all time favourites- instead of a pendulum, this escapement uses a ball bearing rolling along a track to keep time.  At the end of the track, the escapement hits a trigger which causes the track to slant the other way, starting the cycle again.

The video below shows how easily this mechanism can be assembled!

**The STL File:**

Prints on all standard 3d printers without supports, requires the following additional parts to assemble:

- 4 M4x12| 2 M4x20 Screws (https://amzn.to/3zgQb8f)
- 8 M4 Washers (https://amzn.to/3SApQsQ)
- 6 624Z 13mm OD/4mm ID Bearings (Like these https://amzn.to/3DtUUpH)
- 1mm Nylon String or Fishing Line (I used string from this set https://amzn.to/3DtUUpH)
- 7 Ball Bearings (https://amzn.to/3stFWKd)

Recommended print settings:

Layer Height: 0.2mm
Nozzle: 0.4mm
Infill: 15-18% 
Total Filament Required: ~200g
Minimum Build Plate Required: 205x205mm

**All the files have been pre-oriented to save you some set up time! All you need to do is drop the parts into your slicer and hit print!

Gears

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MULTI-STAGE COMPOUND GEARBOX 93:1 | HIGH TORQUE SPEED REDUCER

The Gravity Well

The 3D Printed Wall Clock

The Toronto Strandbeest

Gear Rhombo & Gear Rhombo JR by TNTBA

Magnolia Box

Tappin Hand Skeleton Version (Members only)

The Exploding Circle

The Rolling Ball Escapement