Troubleshooting guide for tapping Problem Torn and rough threads I You used improper tap for material and thread application You should use tap suitab

Troubleshooting guide for tapping Problem Torn and rough threads I You used improper tap for material and thread application. You should use tap suitable for the hole type and material being cutted according to the table from catalogue. Tap drill was too small. You should use correct size of drill. Please check recommended size drill in catalogue (note that there are different sizes for taps and for forming taps). If you have any problems contact our Technical Representative. The tap hole wasn't deep enough. You should check the actual drill depth (the drill could have slipped back into holder). Tap drill hole was missing. Please make sure that the tap drill hole is present (that's common problem in multiple spindle applications on transfer lines). Chips packing in flutes occured. Try to use tap with different flute geometry (angle). There could be necessity of using set of taps. Cold welding on the flanks of the tap (loading). You should use a new tap. You should use coated tap. You should use more coolant/lubrication. You should remove damaged teeth. Overload of the chamfer teeth occured. Use tap with longer chamfer. You should use tap with increased number of flutes to provide more chamfered teeth. Inorrect fixturing or positiong of part. You should use tap holders with axial and parallel compensation. Try presicely fix cutted element. The tap was hitting the bottom of the hole. You should use tap holders with length compensation and with torque overload system. Tapping hard or high tensile materials. You should check if yor tap is properly selected. High performance taps HSSE-PM and VHM may be more suitable than HSSE taps. Problem: Torn and rough threads 1 You used improper tap for material and thread application. You should use tap suitable for the hole type and material being cutted according to the table from catalogue. Cutting speed was too fast or too slow. Please select proper cutting speed. Improve coolant selection to assist the effects of tap speed. There was cold welding on the flanks of the tap. You should use a new tap. You should use coated tap. You should use more coolant/lubrication. You should remove damaged teeth. Chip packing in flutes occured. Try to use tap with different flute geometry (angle). There could be necessity of using set of taps. Grinding burr occured. Remove it with fiber brush. Tap drill was too small. You should use correct size of drill. Please check recommended size drill in catalogue (note that there are different sizes for taps and for forming taps). If you have any problems contact our Technical Representative. There wasn't proper cooling or lubrication while tapping. Select properly lubricant according to the notes from the catalogue Use adequate amounts of coolant/lubrication. Tool overloading occured due to coarse pitch, hard materials or short chamfers. There could be necessity of using set of taps. Q 290