... engraving machineMachine's rotating speed5, 000rpm - 30, 000rpmMachining precision tolerance0.005 - 0.01mmRoughness valueRa 0.8Minimum cutting tool0 ... you paid for.5. What are your main products?Precision casting parts, sand casting parts, machining parts, surface ... of carbon steels is critical for shops making complex precision engineered parts in high volumes. Chemistry, microstructure and mechanical ...