676 Каталог INGERSOLL 2011 Режущий инструмент и инструментальная оснастка Стр.678

Каталог INGERSOLL 2011 Инструмент и оснастка Стр. 678 0676 Lab2u

REPLACEABLE POINT DRILLS DRILL POINT REPLACEMENT INDICATIONS 1. Limit cutting edge wear to .008 to .012. (see Fig. 1) 2. Power consumption exceeds 125% of normal. (see Fig. 2) 3. Drilled hole diameter variation. (see Fig. 3) 4. Deterioration of surface finish of the drilled hole. (see Fig. 4) 5. Significant increase in noise or vibration. (see Fig. 5) Fig. 1: Wear Limit Fig. 3: Diameter Change 0 D nominal + .006' Fig. 5: Noise or vibration drastically increases RECOMMENDED COOLANT PRESSURE AND FLOW RATE 7 .63 .80 Drill Diameter D (inch) Drill Diameter D (inch) For proper chip evacuation the coolant must flow through the tool. If the machine is not equipped with coolant through the spindle we recommend using a coolant inducer. External coolant supply can be used if the hole depth is less than 1 xD and reduced cutting parameters are applied. Coolant Mix Recommended coolant concentration is 6% to 8%. When drilling stainless and high strength steels a 10% concentration is recommended. Dry Drilling It is possible to drill without coolant in cast iron. oil mist through the drill is required (2xD max hole depth). 678