Smallest to largest drill bit

[Fordman6442]

What is the smallest and what is the largest
drill bit you have seen or used. I have used a 1/64 standard and a 2" with morse taper shank.
Don from Canada

 

[TimV]

I've got drills down to #80 (0.0135"), but don't have the equipment to drill large holes--I've only got drills out to about 1.5".

 

[old]

Smallest was about the size of a pin the largest was over 5 inches but made for wood only

 

[rhouston]

how about longest. I've got one about 10 foot long. No clue what it was used for.

 

[Spook]

I've seen 6 in drills on big boring mills, usually spade bits. Small drills, a 1/64 = .015 english.

 

[buickanddeere]

Smallest located at Home Hardware was a 1/32". Used it to drill a metering orifice in the chicken water supply valves. That way if a float valve stuck open the flooding is limited to what a 1/32" hole can flow.
I did find a drill index at Princess Auto with little twerts right down to #60. I keep that box hidden so the wife and kids don't use or break them.

 

[guido]

Hello rhouston,
I think that size bit is used for alarm systems
installation.
Guido.

 

[guido]

Hello Fordman6442,
#60 drill bit .040. U.S
Hand vise bit .025. U.S.
Guido.

 

[Anonymous-0]

I'm confused. You tell everyone to buy a brand new expensive John Deere tractor and have all the latest safety gear yet you buy the cheap tools at Princess Auto and Home Hardware that if they fail could cause serious injury? Really makes a person go Hmmmmmmm? Not sure if water would even drip out of a 1/32" hole. I think the surface tension would stop any water from going through.

 

[Puddles]

1/16th to 10-foot. Not powered by the same motor tho! :lol:

 

[Harvey3]

How the h*** will a little bitty drill bit hurt you ??

 

[buickanddeere]

Harvey3

Don't worry about the person hiding behind the "confused" name. Some people like N series fords or pouring salt water into their tractors and dislike JD.
Confused is so lacking in the basic fundamentals of physics and hydraulics. That he can't imagine 40psi of pressure being able to push water through a 1/32 or 31thou orifice.

 

[Jim@concordfarms.]

We have a 2" taper shank standard 118 degree hss twist drill at work. Works best if used after a 1/2 inch drill as a pilot. Run at about 25 rpm. On the other hand, I have an index with sizes 61 thru 80. About the size of a matchbook. Have an 0-80 tap.. Fragile little thing. I'm almost afraid to touch it!

 

[Anonymous-0]

I have drilled holes as small as .010 (ten thousandths). Today I drilled a bunch of 1/32 (.031) holes in tool steel, using a high-speed Servo drill press. Very sensitive feed, and it will turn up to 20,000 rpm's.

 

[vjd]

Japan sent me a wire smaller then a red hair, I sent it back to them with ten hole drilled in it

 

[Anonymous-0]

personally have no. 8o (0.0135") thru 1-1/4" in home shop. have sharpened 2-11/16" in drill pointer machine as tool crib operator for former employer. plant was closed. machinery's hand book lists smallest twist drill as no.97 (0.0059") and largest as 3-1/2". interesting measurement in comparison is flute length, no. 97 is 1/16", 3-1/2" is 16-1/4" anything longer would be special order extra length. also checked catalog from 2003 cleveland brand usa made 3-1/2" was$1887.03. they also list import drills to 4". i know most will find this data boring but i still like to work with this type research of tooling as i enjoyed my former job for 25 years doing this type data research as well as ordering and sharpening tooling needed for various projects in manufacturing machine shop

 

[dieselpup]

I can't remember the exact size of the smallest, somewhere around 1/32" using a pin vise in a milling machine. (They also work good for drilling your fingernail after smashing it with a hammer)

3 1/2" largest - spade bit in 316l stainless.

 

[JML755]

How the heck do you clear the "plug" out of that hole saw? LOL.

 

[glennster]

i have bits up to 3-1/2 to 4 inch for my radial drill, have the adapters for #1 to #4 morse tapers. gotta get concrete poured in the barn one of these days. pay no attention to the dents on the back wall. dunno who backed the gravity wagon in to it. musta been some hoodlums!!!
heres the drill, cincinatti bickford, about 3 tons or so.
<a href="http://s121.photobucket.com/albums/o234/glennster_01/?action=view&current=DSCF1674.jpg" target="_blank">

</a>
Untitled URL Link

 

[CheeseHeadFred]

Smallest was a #80 - about.013" used to drill lots of holes handheld in aluminum with beeswax for a lube. Not good to have a lot of caffene in your system - too many broken bits!