For each material, bore diameter, tool speed, and for through boring or blind boring, Grundfos can provide exactly the required pressure and flow. For large bore diameters, where high flow and low pressure are needed to coo the tool and material, the Grundfos MTA and SPK ranges are perfect. For deep blind holes, where internal tool cooling is needed to flush the chips back and out of the bore, medium to high pressure is needed and Grundfos' CRK pump is a good choice. For high pressure (up to 35 bar), Grundfos can provide a speed-controlled CRKE pump. The integrated frequency converter on the motor will regulate the speed of the pump to give the required high pressure.