Общий каталог Mitsubishi 2020 - 2021 - страница 1546

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Adjusting Screw A DCx1 DRILLING y OPERATIONAL GUIDANCE Drill Holding Drill Length Drill Installation Installation Tolerance NG DC Thrust bearing type collet chuck holds the drill securely. A > DC x 1.5(DC×over .079" for DC<.118") Do not clamp on the flutes. Run-out < .0012 inch Thin Work Material Interrupted Cutting Stepped Holes Burring and Work Material Chipping One Process Support OK the Work Material zLower the feed OK when drilling theinterrupted part. Requires Prior Machining zDivide the two processes. zLower the feed rate by 50% at If Bending xDrill the larger hole first. the end of through cutting. OccursNG zSpot face withan end mill priorto drilling.*A tool for machining both chamfer and spot face can beproduced to order.xAdd a 45°chamfer.cChange the point angle. Coolant Method (MVE) Through Coolant Type (MVS) Coolant Handling Drill Installation Spindles Revolving Through Coolant Coolant Type Machine Type zSmall chip particles can jam in the oil hole of small diameter drills. Always use a fine mesh filter as a preventative measure. xDirt and dust particles adhere to the oil in old coolant and prevent an efficient flow. Regular coolant exchange is recommended. zDrill a prepared hole about DCx1 using the shortest flute length of MVS. (DC=drill diameter) xUse the prepared hole as a guide when using a drill with Two coolant positions, at the end Less than ø.118 inch : 225PSI-1000PSIand at the center are ideal.More than ø.118 inch : 75PSI-1000PSI an oil hole. Depending on thecutting conditions, peck feed isM More than 450PSI is recommended. recommended. y CAUTIONS FOR USE (For DC<.118") Please use a fine mesh filter (5 microns or less) for coolant to prevent chips from jamming in the coolant hole. For deep drilling with the long type drill, machining a pilot hole is recommended. (Otherwise, centrifugal forces may cause drill breakage.) M073