Каталог Iscar сверла со сменной режущей частью 2022 - страница 104

INDEXABLE DRILLS USER GUIDE Recommended Coolant Pressure and Flow Rate Coolant Flow Rate (liter/min) Drilling Limitations 30 flow rate 20 10 5 6.8 12 16 20 25 Drill Diameter D (mm) Regrinding of drill head is not recommended, Minimum Coolant Pressure (bar) it may cause drill malfunction. 15 12 8XD Centering Hole Data for DCM 8xD 5XD 10 We strongly recommend the use of DCN 1.5D drill of the 3XD same diameter to drill a centering pre-hole. The use of 8 the centering pre-hole improves hole location, accuracy, roundness, straightness and surface finish and reliability. 5 5 3 6.8 12 16 20 25 Drill Diameter D (mm) * For special drills more than 8xD, it is recommended to use higher coolant pressure 15–70 bar. To guarantee chip evacuation, the coolant must always flow through the tool. If the machine is not equipped Use internal coolant with at least 15 bar pressure. with coolant through the spindle, we recommend using a coolant inducer. External coolant supply can be used if hole depth is less than 1xD and reducedcutting data is applied. The diagram shows thePower/Force Requirements coolant flow rates for different drills and pressures. kw Net Power 8 Coolant Mix Recommended emulsion mix is 6-8%. 6 When drilling in stainless and high strengthsteels, a mix of 10% is recommended. 4 When using the IDI drilling head, high pressure oil or 2 7-15% mineral or vegetable based oil emulsion is highly recommended for drilling stainless steel and 0 high temperature alloys. 6 8 10 12 14 16 18 20 22 24 26 No. of Indexes Dry Drilling Material: SAE 4340 It is possible to drill without coolant in cast iron. Speed: 100 m/min Oil mist through the drill is then required (for 2xD max). Feed: 0.2 mm/rev Values change for different materials and drilling conditions. 102 ISCAR