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How do I choose what size tumbler to purchase?
It depends on the size of the product you wish to tumble. 3A: 20mm x 30mm max rock size. 33B: 20mm x 30mm max rock size. 45C: 20mm x 40mm max rock size. QT66:25mm x 45mm max rock size. QT12: 30mm x 70mm max rock size.
I want to tumble river or beach pebbles, what media do I need?
Silicon Carbide grain - 100grit, 220grit and either 320, 400 or 600grit. Polishing Compounds - I recommend the use of Pre Polish and finally Pro Polish.
I want to tumble broken rock pieces.
Use the same method as for river or beach pebbles; you may need to prolong the 100grit process by a couple of days.
How do I get a high polish on my stones?
You can use Tin Oxide - this is expensive, however for good quality Greenstone it makes a brilliant difference.
Can I tumble glass or shell?
Yes, you can, however other tumbling media and methods are involved.
If I tumble stones, can I use the same barrel for tumbling metal findings or components?
No, it is strongly not recommended because of contamination from Silicon Carbide with the media used for polishing metal products.
Do I need a seprate barrel for Silicon Carbide and Polishing Compounds?
If you thoroughly clean your barrel between each step of tumbling you should be OK to use the same barrel; however after some time it is a good idea to purchase a seprate barrel as the rubber does become impregnated with the Silicon Carbide.
Why do some of my stones not polish up?
Some stones are very porous and will never polish up. I recommend you refer to the "Mohs' scale of hardness" in the Lortone manual.
Some of my stones appear to be still rough after the first tumble and others are smoother.
Separate out the smother stones ready for the next process and give the rougher ones more time in the first process.
Can I reuse Silicon Carbide grain?
I don't recommend it as it contain pieces of chipped off rock etc off the stones which will damage rather than grind the stones.
Can I use a Vibratory Tumbler for polishing my stones?
This is ideal when you have profile shaped stones, it retains the shape. You must use the correct media for the stone type.
Do I need to use plastic fillers when tumbling?
It is good to use when tumbling soft stones and when you don't have a full barrel load. Always have seprate plastic filler for the Silicon Carbide process and the Polishing to prevent contamination of the polish and having unsuccessful polishing. If tumbling Jade or Greenstone, Moonstone or Calcite (as the stones are easily damaged) use felt squares as a filler - again keep seprate for the Silicon Carbide and Polishing process.
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