y OPERATIONAL GUIDANCE FOR THE MICRO-MWS DRILL (Φ.0200"-Φ.1200" & Φ0.50mm-Φ2.95mm) (L/D>10) Flat Face Drilling a Drilling a blind hole y 1. Drilling a Pilot Hole y 2. Initial Cutting with the Long Type Drill zUse the SB type drill. zPenetrate the pilot hole at a low revolution. (Revolution speed xUse a drill with the same diameter as the deep hole drill. 500-1000 min-1, feed rate .008-.012 IPR) cDrill depth : Approx 1DC. xStop the long type drill .020-.039 inch short of the pilot hole bottom. vEnsure a high precision hole is drilled for the guide pilot. y 3. Drill the Deep Hole y 4. Drill Retraction zStart cutting at the recommended speed and feed with a non-peck zAfter drilling, lower the cutting revolution about .020-.039 inch short of (continuous feed) cycle. the hole end. (Revolution speed of around 500-1000 min-1) 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 a Drilling and breaking through on irregular faces or angles y 1. Spot Facing y 2. Drilling a Pilot Hole zMachine a flat on the irregular face by using an MFE (flat bottom drill) or zUse a drill with the same or larger point angle than XB or DB type. The an end mill capable of spot facing. Make the spot face diameter the same MWS-SB type is recommended. size as the required deep hole diameter. xEnsure a high precision hole is drilled for the pilot. cDrill depth : Approx 1DC. y 3. Initial Cutting with the Long Type Drill y 4. Drill the Deep Hole zPenetrate the pilot hole at a low revolution. (Revolution speed zStart cutting at the recommended speed and feed with a non-peck M 500-1000 min-1, feed rate .008-.012 IPR) (continuous feed) cycle. xStop the long type drill .020-.039 inch short of the pilot hole bottom. y 5. Breaking Through y 6. Drill Retraction zWhen breaking through, the cutting edge can be damaged. zFinally clear the hole at a revolution speed of 500-1000 min-1. xFeed rate should be half the normal feed. xRetract the drill to the pilot hole depth starting point at a feed rate of 120 IPM. M097 DRILLING