RobbJack staff possesses extraordinary expertise. Our top 20% of employees average 25 years with us, a combined 185 years of experience in the cutting tools industry. Application specialists take a consultative role from the initial sale to robust product support, delivering timely feedback and innovative solutions.
| Cause | Solution |
| RPM too high | Decrease RPM |
| Not enough coolant | Add coolant or increase pressure |
| Chip load per tooth too low | Increase table feedrate |
| Cutting edge too dull | Sharpen cutting edges or replace tool |
| Tool Wear | Change to a harder grade of carbide |
| Tool chipping | See causes for “Chipping” |
| Cause | Solution |
| Not enough coolant | Add coolant or increase pressure |
| Chip load per tooth too high | Decrease feedrate |
| RPM too high | Decrease RPM |
| Chipping | See “Chipping” causes |
| Poor floor finish | Add corner radius to tool |
| Cause | Solution |
| End mill deflection | Use stub tool |
| End mill deflection | Minimize tool overhang |
| Feed to fast | Reduce feedrate |
| Radial width too great | Reduce radial width of cut |
| Axial depth (Z) of cut too deep | Reduce axial (Z) depth of cut |
| Cause | Solution |
| Poor fixturing | Re-Fixture to increase rigidity of setup |
| Chatter | See causes for “Chatter” |
| Cutting edges too sharp | Use T-Process in ferrous materials |
| Corner of tool too sharp | Add corner radius to protect corner |
| Incorrect carbide grade or geometry | Call RobbJack for recommended tool |
| Chip load per tooth too high | Reduce feedrate |
| RPM too high | Reduce RPM |
| Cause | Solution |
| Not enough coolant | Add coolant or increase pressure |
| Cutting Direction | Climb mill part |
| Gummy material | Use Coated tools |
| Chip Packing | Too many flutes, reduce the number of flutes |
| Chip Load per tooth too low | Increase feedrate |
| Cause | Solution |
| Chatter in Aluminum | Use FM Series tool with patented Mirror Edge™ chatter reduction geometry and polished flute |
| Tool overhang too great | Select a necked stub tool |
| Tool length of cut too long | Use a stub tool or necked stub tool |
| Fixturing | Re-Fixture to increase rigidity |
| Tool cutting edges too sharp | Hone cutting edge or use T-Process tool |
| Feedrate too high | Reduce feedrate |
| Depth of cut too deep | Reduce depth of cut |
| Spindle or tool has runout | Re-indicate tool in holder |
| Cause | Solution |
| Not enough coolant. | Add coolant or increase pressure. |
| Incorrect geometry or carbide grade | Call RobbJack for recommended tool |
| Poor Fixturing. | Use sacrifice backing material. |
| T-Process | Use Sharp Tool |
| Gummy Material | Use Coated Tools |
| Chip Load per tooth too low | Increase Feedrate |
