I keep seeing folks using wet tumblers and got to thinking about making it big time. I've also been reading on some folks that have had high lead levels in their blood linked to the dust from dry tumbling. But I'm having trouble justifying $150-200+ for a glorified rock tumbler - why not grab a 1.25 ft^3 cement mixer for about the same price and use that? The only downside I can think of is size if storage is an issue.
Harbor freight has one for $150 that holds 1.25 cubic feet, and if my math is right that's over 180 pounds of concrete, so it should do fine for pins and brass. They sell a larger 3.5 cubic foot one for $210 that will do over 320 pounds of concrete. Both have wheels and handle to move around, belts so it should be a bit quieter than a direct drive, and are beyond overkill so should last. RPM's are about 35.
So what am I missing here? For not much money I can tumble a lot more brass, and tilt the mouth down a bit to drain directly into a seperator for the pins. The only downside I can come up with is internally rusting the mixing drum, which can be addressed if it becomes an issue.http://www.harborfreight.com/1-14-cubic-ft-cement-mixer-61931.html
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