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Black Oil

I just bought a 12 inch slab saw. On my fourth, or fifth, cut I slabbed an interesting "rock" I picked up along Willow Creek above Creed, Colorado. The piece had a black gritty looking cap. After slabbing my oil had turned black. The cap I now think, to the best of my knowledge, was laced heavily with native silver. So much so that the black cap half of the slab shone with large splotches of silver. My concern now is whether I should change the oil in the sump? It doesn't feel gritty. In fact, the tip of my finger dipped in shows fairly clean looking. The black grit has mostly settled out on the bottom. Will the saw pick up this grit and possibly damage the blade?

From John Gonzales-Lusk - February 04, 2008 at 19:25:26
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Message: 65946

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