Heavy Duty 2-Stage Planetary Gearbox | 36:1 Reduction | 100 Kg Load Tested
This project presents a dual-stage high-torque planetary gearbox, fully engineered and manufactured using precision FDM technology.

Designed with structural strength priority and printed at 100% solid density in PETG, this gearbox is capable of rotating up to 100 Kg load under controlled conditions.

🎥 Full Working Video:
[https://youtu.be/UQAriS6rcrk](https://youtu.be/UQAriS6rcrk)

⚙️ Gear Specification (Per Stage)

• Module: 1
• Ring Gear: 120 Teeth
• Planet Gear: 48 Teeth
• Sun Gear: 24 Teeth
• Configuration: Ring Fixed, Sun Input, Carrier Output
• Both stages identical

🔢 Gear Ratio Calculation

Single Stage Ratio:

GR = 1 + (Ring / Sun)
GR = 1 + (120 / 24)
GR = 6 : 1

Total for Two Stages:

6 × 6 = 36 : 1 Reduction

This provides significant torque multiplication suitable for heavy rotary applications.

🛠 Manufacturing Details

• Printer: Bambu Lab P1S
• Material: PETG
• Infill: 100%
• Motor Used: NEMA 24
• Strength-focused print strategy

🏋 Performance

✔ Tested with 100 Kg rotational load
✔ Smooth torque transmission
✔ Compact dual-stage design
✔ Suitable for industrial prototype applications