The PC6004EC Highway Grinder brings p roven and patented closed loop control to the field of highway diamond grinding. Custom designed and built at our Nampa, Idaho Facility. The revolutionary PC6000 is state-of-the-art in highway grinding efficiency. A full industrial computer acts as an operator interface for the machine allowing the operator ... Htg-C2 Concret Grinding Machine Diamond Head. Htg-C2 Concret Grinding Machine Diamond Head. Unit Price US $ 62.46 / pcs. Min. Order 9 pcs. Add to Inquiry Basket. Concrete Polishing Grinding Machine Diamond Head Htg-3y. Concrete Polishing Grinding Machine Diamond Head Htg-3y. Unit Price US $ 101.61 / pcs. grinding head, and turn on the grinder. As the head turns, water is pumped into the sponge, keeping it soaking wet. The wet sponge keeps the diamond surface clean and cool. never use the machine without first checking the water level and making certain the sponge is in place behind the grinding head. If you notice a white paste