Tungsten Carbide Step Drill bits Ⅳ

In last part we know that tungsten carbide step drill bits are also ideal for electrical work, such as chassis and front panels, and can be used to debur holes, but may at the same time cause bur on the a hole’s back side. In this part we talk about how to use a tungsten carbide step drill bit.

To use a tungsten carbide step drill bit, it is suggested to following the below steps.

Step 1: put on appropriate eye protection (safety glasses or goggles).

Step 2: place the tip of the center punch on the metal to be drilled at the location of the desired hole. Hit the blunt end of the center punch with the hammer to leave an indentation (referred to as a center mark). This indentation will provide a place for the tungsten carbide step drill bit to "catch", so it doesn't drift to the wrong location on the work.

Step 3: secure the self-starting step drill bit into the chuck of the drill motor. Apply cutting and tapping fluid to the center mark and the step drill bit.

Step 4: align the tip of the self-starting step drill bit with the center mark on the metal's surface. Depress the drill's trigger to start drilling the hole. Run the small step drill bit completely through the metal. Apply additional cutting and tapping fluid as necessary to keep the step drill bit cool.

(To be continued. This article is divided into 5 parts. Here is part 4. For part 3, please refer to http://news.chinatungsten.com/en/tungsten-information/80509-ti-10402; for part 5, please refer to http://news.chinatungsten.com/en/tungsten-information/80511-ti-10405)

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