Pcb drill bit "vise"

[Rick L]

Coolants such as soap, wax or even water help prolong the life of cutting tools, especially when using power drills on plastic. All cutting tools get dull eventually and higher speeds of turning can create galling of the hole.

20 hours ago, Big Messer said:

... and don't forget to lube them. I use soap or wax.

[customline]

On 9/30/2025 at 3:18 AM, Bugatti Fan said:

Remember though it using PCB board drill bits that they are made from tungsten carbide and the slightest side pressure can break them.

Yup. That's a fact. 😟