Can you help me with these drill bits?

[Ksullivan]

Can anyone tell me what you would use a drill bit this small for?

 

[86k10]

Custom fill and drill carb re-jetting is one use.

 

[A_Pmech]

Many things, but especially orifices. I get a job sometimes that requires drilling #70 holes in brass.

Drills can be purchased in much smaller sizes than that. Carbide circuit board drills are available down to .005" or so.

 

[jerryW]

Very small holes.

Used in electronics and various applications. I have machined a vacuum plate wit holes that small in the past, used for screen printing on a very thin membrane. Holes were spaced at .100 and were .015 on diameter. Then machine the back side for the vacuum passages. Not fun!


jerry