| Problems | Observation | Causes | Solutions |
| Low thread precision. | Threads do not mesh with each other. | Incorrect tool installation. | Set the insert center height at 0mm. |
| Check holder inclination (Lateral). | |||
| Shallow thread. | Incorrect depth of cut. | Modify the depth of cut. | |
| Lack of insert wear or plastic deformation resistance. | Refer to "Quickly generated flank wear." and "Large plastic deformation." below. | ||
| Poor surface finish. | Surface damage. | Chips wrap around or clog the workpieces. | Change to flank infeed and control the chip discharge direction. |
| Change to an M-class insert with a 3-D chip breaker. | |||
| The side of the insert cutting edge interferes with the workpiece. | Check the lead angle and select an appropriate shim. | ||
| Surface tears. | Built-up edge (Welding). | Increase cutting speed. | |
| Increase coolant pressure and volume. | |||
| Cutting resistance too high. | Decrease depth of cut per pass. | ||
| Surface vibrations. | Cutting speed too high. | Decrease the cutting speed. | |
| Insufficient work piece or tool clamping. | Re-check work piece and tool clamping. (Chuck pressure, clamping allowance) | ||
| Incorrect tool installation. | Set the insert center height at 0mm. | ||
| Short tool life. generated. | Flank wear quickly generated. | Cutting speed too high. | Decrease the cutting speed. |
| Too many passes causes abrasive wear. | Reduce the number of passes. | ||
| Small depth of cut for the finishing pass. | Do not re-cut at 0mm depth of cut, larger than 0.05mm depth of cut is recommended. | ||
| Non-uniform wear of the right and left sides of the cutting edge. | The work piece lead angle and the tool lead angle do not match. | Check the work piece lead angle and select an appropriate shim. | |
| Chipping and fracture. | Cutting speed too low. | Increase cutting speed. | |
| Cutting resistance too high. | Increase the number of passes and decrease the cutting resistance per pass. | ||
| Unstable clamping. | Check work piece deflection. | ||
| Shorten tool overhang. | |||
| Recheck work piece and tool clamping. (Chuck pressure, clamping allowance) | |||
| Chip packing. | Increase coolant pressure to blow away chips. | ||
| Change the tool pass to control chips. (Lengthen each pass to allow the coolant to clear the chips. | |||
| Change from standard internal cutting to back turning to prevent chip jamming. | |||
| Non-chamfered work pieces causes high resistance at the start of each pass. | Chamfer the workpiece entry and exit faces. | ||
| Large plastic deformation. | High cutting speed and large heat generation. | Decrease the cutting speed. | |
| Lack of coolant supply. | Check coolant is supply is sufficient. | ||
| Increase coolant pressure and volume. | |||
| Cutting resistance too high. | Increase the number of passes and decrease the cutting resistance per pass. |