Compound Planetary Gearbox (38.75:1 or 50.4) No Bearings, No Hardware!

thingiverse

UPDATE, PLEASE READ: --------------------------------------------------------------------\n2/13/17- Despite initial success, rigorous load testing revealed that my decision to round off gear teeth for easier printing had disastrous consequences - excessive backlash and binding issues due to crooked gears. This experience has taught me valuable lessons for future projects.\nFor comprehensive instructions, refer to the larger version of this design, which shares similar steps except for planet gear arrangement as shown in the image above\nFind additional guidance at https://www.thingiverse.com/thing:2054378\n---------------------------------------------------------------------------------------------------------\nREQUIRED PARTS\nThe 18 Tooth Ring Gear is essential, along with the 19 Tooth Ring Gear and Planet Gears, such as The Less Backlash Gears or alternative options for fitment issues\nA NEMA 17 Mount is also required\nUsing both D-Shaft Sun Gears can cause issues unless the shaft is modified to accommodate them\nFor a 50.4:1 Ratio, pair the 5 Tooth D Shaft Sun Gear with the 6 Tooth Clearance Sun Gear; for a 38.75:1 Ratio, combine the 6 Tooth D Shaft Sun Gear and the 5 Tooth Clearance Sun Gear\n---------------------------------------------------------------------------------------------------------\nASSEMBLY INSTRUCTIONS\nEnsure proper alignment by locating the small circles on each gear - either inset or extruded marks - as shown in the images above\nVerify the flat spot on both Sun gear and D-Shaft before installation, then carefully insert the gear set into the housing with the D-Shaft Sun gear facing the motor.