1. When the electric tapping machine is used for tapping, the hole opening of the threaded bottom hole on the workpiece should be chamfered first.
2. Workpiece positioning: Place the centerline of the threaded hole in a horizontal or vertical position, and ensure that the axis of the tap is perpendicular to the plane of the workpiece.
3. At the beginning of tapping, carefully check and calibrate the position of the tap. When cutting into 3-4 turns of thread, the position of the tap should be correct and no more pressure should be applied to the tap, otherwise the thread shape will be damaged.
4. When tapping the teeth with a tapping machine, try to use intermittent mode. After every 3 turns, reverse 1 turn to make it easier to discharge the broken chips and reduce the phenomenon of the cutting edge being stuck by the tap due to chip sticking.
5. When using an electric tapping machine to tap blind holes, it is necessary to frequently remove the tap to eliminate the chips in the hole. If the chips are not completely removed, it will affect the next tapping effect, and the tap may not move or break.
6. When tapping holes in plastic materials with a tapping machine, lubricating and cooling fluid should be added. For steel materials, oil or high concentration emulsions with higher requirements can be used, such as vegetable oil or molybdenum disulfide. For stainless steel, 30 # engine oil or sulfurized oil can be used.
7. After using the tapping machine, be sure to clean the tap thoroughly to prepare for the next tapping!

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