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-   -   Small Drill Bits - Where to find them? (http://www.hotrodders.com/forum/small-drill-bits-where-find-them-219793.html)

75gmck25 05-25-2012 06:16 AM

Small Drill Bits - Where to find them?
 
I'm working on tuning my Quadrajet (using the Ruggles book), and I need to be able to measure and resize various holes in the carburetor. I need a set of small drill bits in sizes about #52 through #80, and they are hard to find locally.

I found a pin vise set at Hobby Lobby that includes 12 bits, but they don't even list the drill sizes. I would have to buy a micrometer to figure out what I had.

I've also found the pin vise and drill bits online, but would like to find a local source so that I can just pick them up. Anyone have an idea of who might carry them? I'm in San Antonio, so we have most of the common chain stores.

Thanks,

Bruce

cranky1 05-25-2012 06:32 AM

Drago Supply or Grainger? And it's a good idea to have something to measure them to verify they are as marked. It doesn't happen often but I have found mismarked before....

35WINDOW 05-25-2012 06:40 AM

Here's another:

http://www.mcmaster.com/#standard-drill-bits/=hor0h6

timothale 05-25-2012 06:41 AM

carb drills
 
I've always been told to use several drill bits , working your way up to the final size you need

bentwings 05-25-2012 07:22 AM

You will need a micrometer to keep up with the sizes as a "very near" caliper will only do that....get you near the size. haha

I got a set of 61 to 80 drills from Tower Hobbies. I think it was $14 or so works for me. I don't plan on drilling anything out with them...just check sizes of purchased Feed Restrictions.

Keep in mind that drilling a .020 dia hole is a pretty precision project for the home builder to do accurately.

cranky1 05-25-2012 11:04 AM

Quote:

Originally Posted by timothale
I've always been told to use several drill bits , working your way up to the final size you need

Well, it's more accurate to use a reamer instead of a drill bit....

Kevin45 05-30-2012 02:33 PM

Quote:

Originally Posted by cranky1
Well, it's more accurate to use a reamer instead of a drill bit....

Exactly. If you want a smooth bore to your hole, use a reamer. BUT #61 to #80 isn't going to be an easy find.

For drill bits, just buy them online. MSC, Travers, J&L Industrial are good places to order with fast delivery.

And get a set of 0-1 mics. #61 thru #80 bits are only a thou or so different from each other. Chances of getting 20 from anywhere in all the correct sizes is a crapshoot. Get a 61 to 80 drill index to keep the smallest in


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