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Drill User¡¯s Guide Endmill user¡¯s Guide Carbide grade Korea : cutting tools > Tech Information > Drill User¡¯s Guide Cupidrill Identification System Setting Coolant • Keep the T.I.R(Total Indicator reading) within 0.02mm when setting • Keep the declination between Drill center and work piece center within 0.02mm (ex) when a work piece is rotating • Water soluble coolant is recommendable and mixture ratio is 1:5~1:10 • Recommendable output pressure of coolant is 3~5k/§¨ and output amount is 2~5§¤/min. Machine Use machine with high rigidity and sufficient power, and CUOD, CUOL, CUTD and CUTL should be used in a machine with internal coolant supply system. Stability For longer tool life and finer finishing of hole, check spindle & clamping. Chipping and breakage of Drill might be caused by unstable clamping. Tool life Tool should be changed when wearing of cutting edge exceeds 0.2~0.3mm Trouble shooting Trouble Cause Solution Chipping on chsel Bad clamping Check clamping and chuck Improper cutting condition Reduce feed Deflection of tool Check clamping or change chuck Unsteady work piece Check fixture of work piece QUICK abrasion of cutting edge Bad clamping Check clamping and chuck Improper cutting condition increase cutting speed Insufficient coolant Check coolant, increase coolant pressure, Check coolant nozzle or increase coolant Quick abrasion of cutting edge on out Dia Insufficient coolant Check coolant, Increase coolant pressure, Check coolant nozzle or increase coolant Improper cutting condition Reduce cutting speed and increase feed Bad clamping Check clamping and chuck Chipping on land Unsteady work piece Check fixture of work piece Insufficient coolant Check coolant, Increase coolant pressure, Check coolant nozzle or increase coolant Badness of Drill Check a kind of Drill, depth, coolant system and work piece Improper cutting condition Increase feed, Reduce feed(Spot Drill) Under size hole In sufficient coolant Check coolant, Increase coolant pressure, Check coolant nozzle or increase coolant Improper cutting condition Reduce cutting speed, Increase feed Check out Dia of Drill Worn cutting edge Regrind tool Over size hole Improper cutting condition Increase cutting speed, Reduce feed Bad clamping Check clamping and chuck Abrasion of Drill center Keep concentricity within 0.02mm TIR Regrind tool Warp of hole Bad chip flow Apply packing cycle Bad clamping Keep concentricity within 0.02mm TIR Unsteady work piece Check fixture of work piece Abrasion of Drill center Grind tool Improper cutting condition   Drill breakage Bad clamping Check clamping and chuck Unsteady work piece Check fixture of work piece Badness of Drill Check a kind of dill, depth, coolant system and work piece Improper cutting condition Check kind of Drill, part and coolant fluid   Possibly reduce feed or grind tool Chipping of cutting edge on out Dia Bad clamping Check clamping and chuck   Check a kind of dill, depth, coolant system and work piece   Check fixture of work piece   Check coolant, Increase coolant pressure, Check coolant nozzle or increase coolant   Check kind of Drill, part and coolant fluid Badness of Drill Possibly reduce feed Cutting speed in accordance with Drill Dimension Vc m/mm Drill DIA ¥Õ3~5 ¥Õ5.1~8 ¥Õ8.1~12 ¥Õ12.1~16 ¥Õ16.1~20 80~120 0.10~0.18 0.15~0.25 0.2~0.30 0.20~0.35 0.25~0.40 80~110 0.10~0.18 0.15~0.25 0.2~0.30 0.20~0.35 0.25~0.40 70~100 0.10~0.20 0.15~0.28 0.2~0.35 0.20~0.38 0.25~0.42 70~90 0.10~0.18 0.15~0.25 0.2~0.30 0.20~0.35 0.25~0.40 60~80 0.10~0.18 0.15~0.25 0.2~0.30 0.20~0.35 0.25~0.40 50~70 0.10~0.20 0.15~0.28 0.2~0.35 0.20~0.38 0.25~0.42 60~80 0.10~0.20 0.15~0.28 0.18~0.35 0.20~0.38 0.25~0.42 50~70 0.10~0.15 0.12~0.20 0.14~0.25 0.16~0.30 0.18~0.32 25~75 0.04~0.10 0.05~0.15 0.05~0.18 0.08~0.20 0.10~0.20 85~105 0.15~0.25 0.20~0.35 0.25~0.45 0.30~0.50 0.35~0.55 75~90 0.15~0.25 0.20~0.35 0.25~0.45 0.30~0.50 0.35~0.55 65~80 0.12~0.20 0.15~0.25 0.20~0.35 0.25~0.40 0.30~0.45 70~300 0.10~0.25 0.15~0.35 0.25~0.45 0.30~0.50 0.35~0.55 70~200 0.10~0.25 0.15~0.35 0.25~0.45 0.30~0.50 0.35~0.55 70~300 0.07~0.18 0.12~0.25 0.20~0.35 0.25~0.45 0.30~0.50 15~35 0.02~0.07 0.04~0.10 0.06~0.12 0.08~0.15 0.08~0.18 40~70 0.06~0.10 0.08~0.12 0.10~0.14 0.12~0.16 0.14~0.18 Tolerance of Drill Dia mm ~Under3 Over3~Under6 Over6~Under10 Over10~Under18 Over18~Under30 Over30~Under50 Over50~Under80 Tolerance §­ h6 0 0 0 0 0 0 0 -6 -8 -9 -11 -13 -16 -19 h7 0 0 0 0 0 0 0 -10 -12 -15 -18 -21 -25 -30 h8 0 0 0 0 0 0 0 -14 -18 -22 -27 -33 -39 -46 k12 +100 +120 +150 +180 +210 +250 +300 0 0 0 0 0 0 0 m7 +12 +16 +21 +25 +29 +34 +41 +2 +4 +6 +7 +8 +9 +11