Tool Name Needed (For Micro-drill bits)

[Ken Scharabok]

It is about 5" long. Extremely small drill fits fit in end, which then goes over the shank to clamp the drill bits. Rather like an extremely small chuck on the end of a 5/16" or so shank. The shank can then be put into a drill.

In my shop I need to drill .0330 holes in copper pipe. The one I'm using seems to have lost its ability to hold the drill bit as it keep sliding back into the chuck.

I need to know name so I can purchase a couple more.

Can send photo if required.

E-mail: scharabo@aol.com

[Ross]

Pin vise? Pg 45 Lee Valleys Sept09 catalog. I couldn't think of the name but I thought I saw it int he paper version. I like the online version almost as well

http://www.leevalley.com/home/OnlineCatalogs.aspx?c=1

[kaley3dex]

Its a tip cleaner for a cutting torch

[ace admirer]

collet,,,?

[greif]

will a pin vise work or do you need to hang it out? if you do need to hang it out i can look for the brochure from where we order them from at work tomorrow

use cobalt based drills not hss, lot longer life and tougher being small, should have 12,000-20,000 for that size in copper


peck every .010 so the copper does gum up the flutes

[agmantoo]

Mini Drill Chuck

You may want to read this http://www.btinternet.com/~two.mm/ar...ly/fonlydr.htm

A dremel tool and the above fixture would be a good means of using the small bits.

[Ken Scharabok]

I solved my problem essentially by mistake. I decided to try again to drill holes without breaking the small bits. Couldn't find the set punch I used (a small nail set ground to a point) to make the marker dimple. It was temporarily sucked up into the shop's resident black hole. (And, amazingly, the black hole spits it out exactly where I last put it down.)

I came across a VERY sharp awl. Dedided to try it to punch the dimple. Hummm, nice little deep hole. Couple of more taps and it was through. I then only had to use the drill to size the hole.

Thank you for the suggestions though.

I sell about 30-40 propane forges a year (60 holes required) so I don't have the need for specially designed tooling.

[ace admirer]

HMMM so you make forges?!?! how about a photo.....is it something poor boy could afford? poor as southern poor, not that rich northern kinda poor.

[WayneR]

A push drill should also work. It looks like a large screwdriver with a small chuck on the end and spiral cuts into the shaft. A small sleeve on the shaft rotates said shaft as it is pushed-pulled against the work.

For the bit sliding back into the chuck, a piece of stock slightly smaller than the drill diameter could be used as a 'backstop' preventing the bit from advancing into the chuck during use.

Drill bits made for use in drilling printed circuit boards have larger hex-shafts for rapid changing in machinery. These bits are available surplus.

[Ken Scharabok]

"HMMM so you make forges?!?! how about a photo.....is it something poor boy could afford? poor as southern poor, not that rich northern kinda poor."

Go to www.ebay.com. Advance Search. By Seller. Seller = scharabo. Then do a keyword search on forge.

"For the bit sliding back into the chuck, a piece of stock slightly smaller than the drill diameter could be used as a 'backstop' preventing the bit from advancing into the chuck during use."

I've tried that but the wire I have is either too small or too large. We're talking about a drill bit here about the size of the pins which come with a new shirt.

[WayneR]

Hi Ken,

Am aware of the size-that is why the PCB drill suggestion as an additional option.

[greif]

http://www.ritmar.com/html/mindril.html

this is the holders we use. we drill down to .015"

[pops550]

hi Ken, I think what you are looking for is called a pin chuck, ususal range is 0 to 1/8 inch,chucks up in a standard chuck. that small dia. drill run about 500rpm. A couple drops of turpentine or wd40 will lube the bit and keep it from loading up. Good luck, Carl