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I feel like there are not many choices for a mini reciprocating sanders in the market, yet they all have something in common: being quite expensive. So I made a simple and cheap one with 4$ total.

Compound list:

+plastic gear with inner diameter 2.3mm; 57mm 2,5mm rod (cutting from 100mm); eccentric gear salvage from a mini pump.

+ Rs380 dc motor; dc female jack; 112D on-off switch.

+ dc power supply.

Note: you “shouldn't” print this if you can't find this particalar mini pump model. I tried to replicate the eccentric gear but it not working well with fmd printer. That being said everthing can be found on taobao.

Reciprocating sander

Reciprocating sander

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