Smooth-O-Matic Parts Polisher and Rock Tumbler
by 2n2r5, published
Well then, just throw you parts in a 1 quart paint can with some rocks, wait several hours and voilÃ ! 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
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Rock tumblers work because rocks are heavy... They bang and grind against each other.
So to polish plastic parts I think you will need a fine grit AND heavy rocks/things of some sort.
I've been looking at lapidary parts finishing for a while now, but haven't yet jumped in and spent money due to a lack of knowledge. From what I've gathered, I think a vibratory machine might be better suited to printed parts than a tumbler. Honestly I think a blasting chamber might be best but I can't have that amount of mess and dust in my shop. I'll be interested to hear your results with various media.
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##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)
* 45 RPM 6VDC Motor with 1/8" Shaft
* ZEBRA 6.5VDC SWITCHING POWER SUPPLY or equivilant
##Settings: 2 shells, 20% infill, .3mm layers
* 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)
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