Общий каталог Mitsubishi 2020 - 2021 - страница 1611

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DRILLING (SOLID CARBIDE) MNSaaaDB y OPERATIONAL GUIDANCE FOR THE MNS...DB DRILL Flat Face Drilling aDrilling a blind hole y 1. Drilling a Pilot Hole y 2. Initial Cutting with the Long Type Drill z Use a drill with the same or larger point angle than the MNS...DB type. zPenetrate the pilot hole at a low revolution. (Cutting speed 65-100 Mitsubishi type MNS-LB, MAE-MB or MAS-MB drill is recommended. SFM, feed rate .008-.012 IPR) x Ensure a high precision hole is drilled for the pilot. xStop the long type drill .039-.118 inch short of the pilot hole bottom. c Drill depth : Approx 1DC or deeper. (Adjust the pilot hole depth according to the length of the MNS...DB type.) y 3. Drill the Deep Hole y 4. Drill Retraction z Start cutting at the recommended speed and feed with a non-peck z After drilling, lower the cutting revolution about .039-.079 inch short of (continuous feed) cycle. the hole end. (Cutting speed of around 65-100 SFM) xRetract the drill to the pilot hole depth starting point at a feed rate of 120 inch/min. cFinally clear the hole at a cutting speed of 65-100 SFM and feed rate of .008-.012 IPR. Irregular Face Drilling aDrilling and breaking through on irregular faces or angles y 1. Spot Facing y 2. Drilling a Pilot Hole z Machine a flat on the irregular face by using an MFE (flat bottom zUse a drill with the same or larger point angle than the super long type. drill) or an end mill capable of spot facing. Make the spot face Mitsubishi type MNS-LB, MAE-MB or MAS-MB drill is recommended. diameter the same size as the required deep hole diameter. xEnsure a high precision hole is drilled for the pilot. c Drill depth : Approx 1DC or deeper. (Adjust the pilot hole depth according to the length of the super long type.) y 3. Initial Cutting with the Long Type Drill y 4. Drill the Deep Hole M z Penetrate the pilot hole at a low revolution. (Cutting speed 65-100 zStart cutting at the recommended speed and feed with a non-peck SFM, feed rate .008-.012 IPR) (continuous feed) cycle. x Stop the long type drill .039-.118 inch short of the pilot hole bottom. y 5. Breaking Through y 6. Drill Retraction z When breaking through, the cutting edge can be damaged. z Finally clear the hole at a cutting speed of 65-100 SFM. x A feed rate of .002-.004 IPR is recommended. xRetract the drill to the pilot hole depth starting point at a feed rate of 120 IPM. M138 DRILLING