| | | | | Cutt | ing | Co | nditio | n | s | | Style of t | and he T | Desi ool | gn | Ins | Mac talla | hine tion | and of Tool |
| Tr | S F ouble | olutions actors | Cutting Speed Up Dow | Feed Rate n | Lower the Feed at Initial Entry | Lower the Feed when Exiting | Step Feed | Increase the Accuracy and the Depth of the Pre-hole | I Oil Rti | Cuttin Fluid ncrease ao Increase Volume | g s Increase Coolant Pressure | Large Small Chisel Width Honing Width Core Thickness | Shorten the Flute Length | Decrease the Lip Height | Use a Drill with Coolant Holes Change to a Drill with X Type Thinning | Tool Installation Accuracy | Shorten Tool Overhang | Flatten the Work Material Face | Work Material Installation Accuracy Machine Stability, Rigidity |
| Drill breakage | Lack of drill rigidity Improper cutting conditions Large deflection of the tool holder | | a | | | | | | | | a | a | | | a | | | a |
| | Work material face is inclined | | | | | | | | | | | | | | | | a | |
| ife | Large wear | Improper cutting conditions | a | | | | | | | | | | | | | | | | |
| l L | at the peripheral | Increase in temp. at cutting point | | | | | | | a | a | | | | | a | | | | |
| Too | cutting edge | Poor run-out accuracy | | | | | | | | | | | | | | a | | | |
| hort | Chipping of | lmproper cutting conditions l | | a | | | a | | | | | | | | | | | | |
| S | the peripheral | Large deflection of the tool holder | | | | | | | | | | | | | | a | | | a |
| cutting edge | Chattering, vibration | | | | | | | | | | a | | | | | a | | a a |
| | The chisel edge width is too large | | | | | | | | | | a | | | | | | | |
| Chisel edge chipping | Poor entry | | | a | | | | | | | | | | | | | | |
| | Chattering, vibration | | | | | | | | | | a | | | | | a | | a a |
| Hole diameter | Lack of drill rigidity | | | | | | | | | | a | a | | | | | | |
| increases | Improper drill geometry | | | | | | | | | | | | a | | | | | |
| Hole diameter | Increase in temp. at cutting point | | | | | | | a | a | | | | | a | | | | |
| cy | becomes | Improper cutting conditions | a | | | | | | | | | | | | | | | | |
| ura | smaller | Improper drill eometr | | | | | | | | | | | | a | | | | | |
| Acc | | gy Lack of drill rigidity | | | | | | | | | | a | a | | | | | | |
| Hole | Poor straightness | Large deflection of the tool holder | | | | | | | | | | | | | | a | | | a |
| or | | Poor guiding properties | | | | | | a | | | | | | | | | | | |
| Po | P hl | Lack of drill rigidity | | | | | | | | | | a | a | | | | | | |
| oor oe positioning | Poor entry | | | | | | | | | | | | | a | | | | |
| accuracy, roundness and i | Improper cutting conditions | | | a | | | | | | | | | | | | | | |
| surface finish | Large deflection of the tool holder | | | | | | | | | | | | | | a | | | a |
| urr | Burrs at the | Improper drill geometry | | | | | | | | | | a | | | | | | | |
| B | hole exit | Improper cutting conditions | | | | a | | | | | | | | | | | | | |
| rol | | Improper cutting conditions | | a | | | | a | | | | | | | | | | | |
| ont | Long chips | Poor chip disposal | | | | | | | | a | a | a | | | a | | | | |
| ip C | | Improper cutting conditions | a | a | | | | a | | | | | | | | | | | |
| Ch | Chip packing | Poor chip disposal | | | | | | | | a | a | a | | | a | | | | |