Precautions when using electric tapping machine
1. When the electric tapping machine is tapping, the hole of the threaded bottom hole on the workpiece must be chamfered first.
2. Position the workpiece so that the center line of the threaded hole is placed in a horizontal or vertical position, and the axis of the tap is perpendicular to the plane of the workpiece.
3. At the beginning of tapping, carefully check and correct the position of the tap. Generally, when cutting 3-4 turns of thread, the position of the tap should be correct, and pressure should not be applied to the tap, otherwise the thread profile will be damaged.
4. Try to use the intermittent mode when tapping the tapping machine. It should be reversed one turn every 3 turns, so that the chips can be easily discharged after breaking, and it can reduce the phenomenon of the cutting edge that the tap is stuck due to sticky chips.
5. When the electric tapping machine taps blind holes, it is necessary to withdraw the tap frequently to remove the chips in the hole. If the cutting is not clean, it will affect the next tapping effect, and the tap will not move or the tap will be broken.
6. When tapping the screw holes of plastic materials, the tapping machine should add lubricating coolant. For steel materials, generally use motor oil or emulsions with a higher concentration can be used rape oil or molybdenum disulfide. For stainless steel, 30# engine oil or vulcanized oil can be used.
7. After the tapping machine is used, be sure to clean the taps and get ready for the next tapping!