Tungsten Carbide Step Drill bits Ⅴ

In last part we know that to start drilling with a smaller tungsten carbide step drill bit, it’s necessary to prepare a center mark on workpiece and apply cooling fluid. In this part we go on explain how to use a tungsten carbide step drill bit.

Step 5: release the chuck of the drill motor to remove the small tungsten carbide step drill bit. Secure the large step drill bit into the chuck of the drill motor. Insert the small tip of the large step drill bit into the hole you created in the metal. Apply cutting and tapping fluid onto the large step drill bit and around the hole in the metal.

Step 6: depress the trigger of the drill motor to run the large-diameter step drill bit into the hole. Stop drilling frequently to apply additional cutting and tapping fluid to the drill bit. Stop drilling when the hole has reached the desired diameter.

Step 7: remove the large tungsten carbide step drill bit from the drill motor. Clean both step drill bits with a rag to remove metal shavings from the bits. Clean the metal shavings from around the hole that you drilled in the metal. Store the drill bits in a tool box or drill bit container to avoid dropping them or otherwise damaging them.

(The end-This article is divided into 5 parts. Here is part 5. For part 4, please refer to http://news.chinatungsten.com/en/tungsten-information/80510-ti-10404)

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