I'm designing a direct chill tilt-pour casting mold. Fused silica will be used for part of the mold. I have found a supplier of machine grade fused silica. I personally have never machined a ceramic and our machine shop also has close to nil experience. What is the extent of the lubrication that is required. Is spraying a continuous stream okay or should flooding be used? The manufacture says use 'lots' of lubrication or risk chipping the part. Thanks for any input. The raw material isn't cheap and I would hate to ruin a part for lack of proper lubrication. Thanks.
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