The screw tap
The screw tap can be sharpened 2-3 times, especially the large diameter screw tap. The grinding of the screw tap mainly depends on its cost. The screw tap is usually uncoated after grinding.
The screw tap
The screw tap can be sharpened 2-3 times, especially the large diameter screw tap. The grinding of the screw tap mainly depends on its cost. The screw tap is usually uncoated after grinding.
