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Smooth-O-Matic Parts Polisher and Rock Tumbler

3D model description

# #Tired of having to use a exact-o knife to clean off your 3d printed parts?

Well then, just throw you parts in a 1 quart paint can with some rocks, wait several hours and voilà! You have partially cleaned parts that still need to be deburred. err, well .... Maybe I did something wrong. I am sure you will have better luck.

This is a video of it working.

This is a great low cost DIY solution for those who don't want to pay an arm and a leg for a rock tumbler. I have had mine running now for a coupler hours. I don't know if the parts are getting cleaned but I do know that it seems to be functioning as expected. I will probably be selling the kits. I don't really know what to use as an abbrasive. I went with a bag of small gravel from home depot. The gravel doesn't seem to work at all for me. It might just need a lot more time. I think I will head to Harbour Frieght and get a bag of walnut shells tomorrow.

# #REV 2.0 Coming Soon

Improvements in version 2:

  • addition of a 3rd gear
  • a new frame
  • all new gears
  • Gear box cover
  • Electronics upgrade including Speed control*

*depends on if the parts come in before I am done

3D printing settings

REV 1.0

#Parts List:

# #Home Depot -

* 3/8" x 36" Round Rod - Aluminum

* 1 1/2" x 2' PVC Pipe Section

* 3M Safety Walk 2 in. x 15 ft. Step and Ladder Tread Tape

* 1 Roll of Duct Tape (if you don't already have some laying around. You won't need much)

* 2 x BEHR 1 Qt. Metal Paint Bucket and Lid

American Science & Surplus (ASS)

#Printing :

# #Settings : 2 shells, 20% infill, .3mm layers

# #Quantities :

* 1 x Frame_Front or Frame_Front_Half_Width (half width is shown)

* 1 x Frame_Back

* 4 x Roller_End_Cap

* 1 x Motor_Housing

* 4 x PVC_Bushing

* 1 x Motor_Gear

* 1 x Roller_Gear

* 4 x Can_Fins_Insert (2 per can)



  1. Cut 24" PVC Pipe into 2 equal pieces of 12" long
  2. Cut 2 x 16" lengths from 3/8" Aluminum Round Bar ( this will be a little long but will be trimmed after you dry fit everything)
  • 3D model format: STL and ZIP





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