Air hole??

[Waders41]

Looking to still out the air hole on my new cobra. What's the best way to do this. What sized/type of drill bit to use??


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[Krog]

Can't believe no one has commented on this yet and I have never done it but since the cobra is titanium its prolly best to use a titanium drill bit and start small. The stock air hole is 1mm I think so you should use the next size up in size for your bit and then gradually work your way up to the size your happy with just be careful because judging by all the WTB ads in the classifides its easy to destroy the cap.

 

[WillyB]

I use a small, cone diamond burr.

I run it under a little water in a drill, checking as I go along. It doesn't take much to change the draw.

New 20pc Diamond Burr Set 1 8" Shank 120 150 Grits Dremel Type | eBay

 

[dragonrage]

go to walmart or home depot or lowes and get a dremel drill bit set and us them smallest first till you get the air flow you want

 

[Jim532]

use a hard drill such as carbide. The cobra is made from hard metal. Its "not" made of Titanium. Its made of 6AL4V which is grade 5 Titanium "Alloy". So its very hard. I machine my atomisers in grade 2 Titanium which is considered commercially pure (CP). Pure Ti is softer than the Alloy grades but I still use carbide drills to put the air hole in it.
1 Pcs Carbide Micro Drill Bits CNC PCB Dremel from 0 1mm to 1 2mm | eBay
carbide drill | eBay