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Rock Tumbler

by TrevM

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This is a very cheap rock tumbler.

You will need 4 skate board bearings, a motor, a power supply and some 1mm thick rubber sheet, all available off eBay.
Bearings I got here:
https://www.ebay.co.uk/itm/10pcs-Ball-Bearing-608ZZ-Bearing-Deep-Groove-Ball-Bearing-8mm-22mm-7mm-Useful/332464460888?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
£2.98 for 10, 29.8p each x 4 = £1.19
The rubber sheet I got here:
https://www.ebay.co.uk/itm/SOLID-RUBBER-SHEET-BLACK-1400MM-x-1MM-Leatheret

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