O/T ... Smallest Hole Of Course

[CAM-mando]

Lest we forget ... Smallest Drilled Hole ... PI tape not required

 

http://www.cpwest.com/microhole.html

 

[ 07-09-2003, 02:59 PM: Message edited by: CAMmando ]

[mayday]

.0015 but it wasn't a drill

micro hole edm in a prototype surgical needle

[Fig sign]

drill 0.5mm on h13 (0.0197``)

[cadcamjim]

.010 " carbide drill

[Müřlıń®]

I built a 16 cavity plastic injection mold back in '79 for a nasil spray tip. The part that goes in your nose.

 

The core pins in the inserts were ground out of a 3" headed pin that tapered off a radius into a .015" Dia pin.

The the oposing shut-off holes were in small inserts bout .1 in dia and 1/2" long. So I drilled the holes the blanks insertes and stuck a guage pin in them and indicated them in with a .0001 indicator, then groud the outside of the inserts consentric to the holes.

 

Murlin

[Guest]

I've done wire extrusion tooling that had a .010 hole in it. I drilled it with a HSS drill on and old Clausing manual lathe. Then we bored a taper down to the .010 hole using hand made tapered carbide boring bars. All this in Monel 400.

[Thad]

Boy, do I feel like a wuss. .032 is the smallest hole I've drilled. I thought the "pucker" factor was tight (pun intended) doing that.

 

Thad

 

[ 07-09-2003, 11:24 PM: Message edited by: Thad ]

[sbrooks]

.015 dia .08 deep in Hastelloy C276.

[mold100]

sbrooks-thats pretty good I used to cut haspalloy

cutter and coating technology has advanced since then but it still cant be fun.

 

.007 flush holes in graphite

[sbrooks]

It wasn't fun at all. I don't remember how many drills I went thought. At .015 in dia I didn't even try resharping them just throw it away and grap a new one.

[Keith Graydon]

.005 in brass, We used to do smaller stuff for electronics in the old days.

 

/shrug

[roy g. biv]

I've got a package of .005 drill just waiting to go through some 303SS. Now I just need the material.

[Paul McGarr]

I just finished 12 .012 dia drilled holes .350 deep. I was nervous I would break one, but I did not. Probably because I was drilling 6061 aluminum...no major challenge.

[Rekd™]

quote:

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Probably because I was drilling 6061 aluminum...no major challenge.

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Any time you're drilling almost 30 times the diameter you cant take it lightly. GJ

 

'Rekd