Grinding

{
  "id": "MLC-T-ENV-012615",
  "term": "Grinding",
  "field": "Environment",
  "definition": "1. Process performed on a workpiece to remove undesirable material from the surface or to remove burrs or sharp edges. Grinding is done using belts, disks, or wheels consisting of or covered with various abrasives.\n\n2. Removing stock from a part by using abrasive grains held by a rigid or semirigid binder. Grinding shapes or deburrs the part. The grinding tool usually is a disk (the basic shape of grinding wheels), but can also be a cylinder, ring, cup, stick, strip, or belt. The most commonly used abrasives are aluminum oxide, silicon carbide, and diamond. The process may use a grinding fluid to cool the part and remove debris or metal fines. Wastewater generated during grinding includes spent coolants and rinses. Metal-working fluids become spent for a number of reasons, including increased biological activity (i.e., the fluids become rancid) or decomposition of the coolant additives. Rinse waters typically are assimilated into the working fluid or treated on site.\n\n3. Process of removing stock from a workpiece by the use of a tool consisting of abrasive grains held by a rigid or semi-rigid grinder. Grinding includes surface finishing, sanding, and slicing.",
  "references": [
    "40 CFR 63.11522 (CFR 2013)",
    "40 CFR 438 Appendix B (CFR 2013)",
    "40 CFR 471.02 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/grinding/"
}