Association and precaution of using thread tools Operating Equipment Precautions Stable tapping machine spindle lead (tap pitch), suitable for high precision tapping: special purpose machine\CNC lathes\CNC machine center. Unstable drilling machine spindle lead (tap pitch) table, not suitable for high precision tapping: vertical drilling machines\ gauge lathes.
In process inspection: 1. Check if the deviation of the main spindle is stable (suggested deviation under 0.01 mm). 2. Spindle is connected to the tap screw chuck. Check whether the tape screw chuck rotation deviation is stable (suggested deviation is under 0.01 mm). 3. Check whether the rotation deviation of tap screw spindle mounted with chuck is stable (suggested deviation is under 0.01 mm). 4. Check whether the axis of the hole location before tapping process is on the same axis as the tap screw axis to prevent repeated tilting, shaking, and collapse of tap screw. 5. Check whether the bottom hole dimension is appropriate before tapping. If the bottom hole is too small, the resistance of tapping process will be too high and cause damage to the thread tap. 6. For issues related to tap screw and cutting tools, the suppliers should guarantee the precision of dimensions for the screws and tools. For abnormal situations during the use processes, please have the user check the above items to make improvements. Recommendations for using super hard tungsten carbide taps: ● Please use tapping machine of stable pitches. ● Please use the greasy cutting compound,when cuts the oil emulsions to be most suitable. ● According to the material of work piece and the size of thread change the tapping speed.
