Accessorize the light switches at your home or office with this intriguing mechanism that utilizes a planetary gear!

All parts can be 3D printed (no supports are required), and the design is fully snap together - so no glue is needed. I printed the five gears as a unit (using the attached “Planetary Gears.stl” file), which shows their proper orientation for assembly. But, if you'd rather print the gears independently (or are worried that a roughly .2 mm gap tolerance between the gears may cause an issue on your printer), then an individual STL is provided for each gear as well.

I designed this model from scratch for the “Office Accessories” here on Printables, but I want to call out “Engineer Dog” who showed off a similar idea several years ago. Some notes on assembly follow:

Step #1:

Place the gears on the base plate in the orientation shown below, and note that the “planet gears” do have a right-side-up (due to the use of a double-helix gear style, which is part of what helps the entire piece hold together without needing additional brackets):

Step #2:

Place the rocker arm over its pivot point, with the long part of the arm facing towards the bottom of the plate:

Step #3:

Swing the rocker arm around and gently lift it over the top of the actuator peg on the sun gear:

Step #4:

Press the three gear nuts through the planetary gears until they snap into the other side of the base plate:

Step #5:

Unscrew your original light switch plate cover, and then attach your new planetary gear light switch cover using the same screws from the original:

Planetary Gear Light Switch Cover

by squinn · original on Printables ↗

Household / Other House Equipment

♥ 837⬇ 2.2k🖨 16 prints

License: Creative Commons — Attribution ↗walllightswitchlightslightswitchplanetaryplanetarygearlightswitchcoverswitchplateswitchplatecoverplanetarygearslightswitchplateplanetarygearholder

Print profiles

Rocker Arm.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
Gear Nut.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
Sun Gear.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
Ring Gear.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
Planetary Gears.stlDEFAULT
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
Planet Gear.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
Base Plate.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
Planetary Gears Wall Switch.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print