Abnormal wearChipping and fracture GradeInsertExt. ToolholderInt. ToolholderThreadingGroovingMiniature toolMilling cutterEndmillDrilling toolTooling SystemUser's GuideIndex User’s Guide - Technical Reference A Drilling To o l s Tr o u b l e s h o o t i n g for indexable drills B Problem Cause Countermeasure Central ¡Increase the cutting speed by 10 % within standard conditions. cutting Relief surface Inappropriate cutting conditions edgePeripheralcuttingRelief surfaceInappropriate cutting conditionsedge¡Lower the feed by 10 %.¡Increase the cutting speed by 10 % within standard conditions.¡When the feed is extremely low or high, set up it within standard conditions.C ¡Confirm that the cutting fluid flow is higher than 7 liter/min. ¡The concentration of cutting fluid must be higher than 5 %. Varieties and supply of cutting fluid ¡Use the cutting fluid superior in lubricity.¡Change to internal cutting fluid supply from external one.¡Change to the machine with higher torque.D Relief surface Vibration in drilling ¡Change to the clamp method with rigidity. ¡Change the drill setting method. Unsuitable for selection of grade ¡Change the grade to high wear resistant.CommonLooseness of screws¡Tighten the screw. E ¡Change to internal cutting fluid supply from external one. ¡Increase the supply rate of the cutting fluid. (Higher than 10 liter/min.) Cutting heat is too high Crater ¡Lower the feed by 20 % within standard conditions.¡Lower the cutting speed by 20 % within standard conditions.¡Lower the feed by 20 % within standard conditions.F Excessive chip welding ¡Lower the cutting speed by 20 % within standard conditions. ¡Increase the cutting speed by 20% and lower the feed by 20% within standard conditions. Chipbreaker Chip packing ¡Raise the fluid pressure (for higher than 1.5 MPa).Misalignment for workpiece rotation¡Set the misalignment to 0 ~ 0.2 mm.G Large offset ¡Check the manual and use the tool in the allowable offset range. Central ¡Flatten the entry surface in pre-machining. cutting The rotation No flatness of machined surface ¡Set the feed for lower than 0.05 mm/rev in rough surface area.edgecenter of drillHigh feed¡Lower the feed by 20 ~ 50 % within standard conditions.H Using a chipping corner ¡Confirm the corner when exchanging inserts. ¡Exchange the corner or the insert before the nose wear Using inserts in excess of tool-life reaches 0.3 mm.Peripheral¡Flatten the entry surface in pre-machining.cuttingPeripheralNo flatness of machined surface¡Set the feed for lower than 0.05 mm/rev at rough surface area.I edge corner area The existence of interrupted area ¡Set the feed for lower than 0.05 mm/rev in interrupted area. Using a chipped cornerThe unusedcorner areaHigh hardness of workpiece¡Confirm the corner when exchanging inserts.¡Increase the cutting speed by 20 % and lower the feed by 20 % within standard conditions.J¡Raise the fluid pressure (for higher than 1.5 MPa). and cutting Chip packing ¡Lower the feed by 20 % within standard conditions. edge Machinery impact ¡Change to continuous feed in case of pick feeding.¡Exchange the corner or the insert before the nose wearUsing inserts in excess of tool-lifereaches 0.3 mm.K Contact ¡Change to the machine with higher rigidity. Common boundary Vibration in drilling ¡Change to the clamp method with rigidity. ¡Change the drill setting method.High hardness of workpiece¡Set the feed for lower than 0.05 mm/rev. L Flaking Thermal impact ¡Change to internal cutting fluid supply from external one. ¡Lower the feed by 20 % within standard conditions. Common Unsuitable for selection of grade ¡Change the grade to toughness.Looseness of screws¡Tighten the screw. M Tungaloy L079