| Question No. | Problem description |
| 1 | Aperture Ultra Difference |
| 2 | Horn Hole |
| 3 | Hole Roundness Is Not Good |
| 4 | Poor Surface Quality of Holes |
| 5 | Burr At The Exit of The Hole |
| 6 | Chipping |
| 7 | Back of Drill Bit Blocked Chips |
| 8 | Bit Breaking |
| 9 | Blocked Chips |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Solutions |
| ● | ● | ● | ● | ● | ● | Reduce tool nose run out | |||
| ● | ● | increase Inverted cone | |||||||
| ● | ● | ● | ● | ● | ● | ● | Reducing blade height difference | ||
| ● | ● | ● | ● | ● | Improving tool symmetry | ||||
| ● | ● | ● | Improving cutting edge type | ||||||
| ● | ● | Improving blade treatment | |||||||
| ● | ● | Increase point angle | |||||||
| ● | ● | ● | ● | ● | ● | Tool length reduction | |||
| ● | Select and use coating | ||||||||
| ● | ● | ● | Increasing internal cooling pressure | ||||||
| ● | ● | ● | ● | Cutting speed reduction | |||||
| Improving cutting speed | |||||||||
| ● | ● | ● | ● | ● | ● | Reduce feed | |||
| ● | Raise feed |
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