Differential Planetary Gearbox

A 12.4:1 planetary gearbox, specifically designed for use in extruders, in a 42mm x 42mm x 32mm package.

3D printer parts and enhancements

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Description

Sources are available at https://github.com/Lodran/differential_planetary_gearbox

- Companion extruder soon to be available at http://www.youmagine.com/designs/pocket-extruder

- Fits either a Nema 17 or Nema 14 motor.

Four variations are provided:

- gearbox_printed_sun_105.stl - Printed sun gear, 10mm (105ZZ) drive shaft bearing.

- gearbox_printed_sun_115.stl - Printed sun gear, 11mm (115ZZ) drive shaft bearing.

- gearbox_metal_sun_105.stl - Metal sun gear (See BOM), 10mm (105ZZ) drive shaft bearing.

- gearbox_metal_sun_115.stl - Metal sun gear (See BOM), 11mm (115ZZ) drive shaft bearing.

Note: Assembly is fairly configurable, so the BOM is more of a guideline than anything else.

Materials and methods

- PLA or other wear resistant plastic.
- 1x 105 Bearing - [Source: HobbyKing](http://www.hobbyking.com/hobbyking/store/__21549__Ball_Bearing_5x10x4mm_2pcs_bag_Turnigy_Trailblazer_1_8_XB_and_XT_1_5_.html) (Comes with a spare, which will be used in the extruder.)
- 1x 10T/5MM M1 Pinion - [Source: HobbyKing](http://www.hobbyking.com/hobbyking/store/__45522__10T_5mm_M1_Hardened_Steel_Pinion_Gear_1pc_.html) (Optional, see description)
- 3x M3x10 bolt
- 6x M3 Nylock nut
- 4x M3x30 bolt
- 1x M5x30 bolt
- 1x M5 Nylock nut

Documents

Issues

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Comments

C093bbd551052900e6efeb34bb81b533?default=blank&size=40Odacir Cristofolini added this to the Mechanicals collection ago
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3ae073b4815204de4d87f5ea83313c3c?default=blank&size=40benjabr added this to the Gearbox collection ago
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B46556bd70173ab67eab3674db900305?default=blank&size=40Riley Dyck added this to the Mechanisms collection ago
84b0705343d374c365e96cc471ebe4e2?default=blank&size=40Alexander added this to the Gears collection ago
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0a00702fec7aa8587ee24c9efdb7617c?default=blank&size=40TechnoNerdDad commented ago

For those who have printed this, I'm curious about backlash and it this gearbox would be suitable for driving Z axis leadscrews with 8mm thread-pitch? Thoughts?

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35f65c8b2331f6c1f3456bcdd48dc547?default=blank&size=40Ryan Wolfe added this to the gears collection ago
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76652674c3ddbb662044858c1baa3c79?default=blank&size=40dintid commented ago

What is the actual difference between the Printed and Metal versions? I can see different drive shaft bearings being listed, but the use is rather unclear?

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