
Ben Krasnow: Quickly tapping (threading) holes in plastic
12/2/2018· For plastic, I use lots of distilled water as coolant. If I am tapping a blind hole, I usually just fill it up with water. The nice thing about using distilled water is that it leaves no residue after being blown clean with compressed air. Tapping a hole with the hand drill works best for a certain range of sizes: In ABS, I would use the drill for any size #2 through 1/4" In …