SLIM PLANETERY GEARBOX FOR NEMA 17
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SLIM PLANETERY GEARBOX FOR NEMA 17
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Updated at source:
Model information
- Source
- Printables
- Category
- RC & Robotics
- License
- Creative Commons — Attribution — Noncommercial
A COMPACT (PLANETARY) GEARBOX DESIGNED TO MOUNT DIRECTLY ON TOP OF A NEMA 17 MOTOR TO INCREASE TORQUE AT THE EXPENSE OF SPEED. IN THIS CONFIGURATION, THE RATIO IS 1:4.36, MEANING THE OUTPUT SHAFT COMPLETES ONE FULL ROTATION FOR EVERY 4.36 ROTATIONS OF THE STEPPER MOTOR.
IT WAS DESIGNED TO REPLACE TWO LARGE GEARS THAT TOOK UP CONSIDERABLE SPACE AND WERE SUBOPTIMAL FOR MY PROJECT. THE GEARBOX CONSISTS OF A SUN GEAR WITH 11 TEETH, FOUR PLANET GEARS WITH 13 TEETH EACH, AND AN OUTER RING GEAR WITH 37 TEETH. ALL GEARS USE PRIME TOOTH COUNTS, WHICH HELPS REDUCE REPETITIVE TOOTH ENGAGEMENT AND MINIMIZES WEAR OVER TIME.
IF YOU ARE HAVING PROBLEMS FITTING THE PARTS TOGETHER, YOU MAY NEED TO CALIBRATE THE FLOW RATE AND PRESSURE ADVANCE (FLOW DYNAMICS) FOR YOUR FILAMENT. SOME FILAMENTS PRINTED PERFECTLY, WHILE OTHERS RESULTED IN PARTS THAT WERE SLIGHTLY TOO LARGE OR TOO SMALL.
NOTE: THE CARRIER SHOULD BE PRINTED SEPARATELY FROM THE OTHER PARTS; OTHERWISE, THE THIN POLES MAY NOT PRINT CORRECTLY.
PARTS FOR ASSEMBLY:
4× M3 × 20 MM SCREWS
8× MR63 OR 673 BEARINGS
1× MR128 BEARING – OPTIONAL