where to find 1\4-28 threaded shank carbide burrs

[531blackbanshee]

i have a rockwell ninety degree die grinder.instead of a collet it use's threaded shank cutting tools.does anyone know where to find carbide burrs that are threaded?i have googled it ,to no avail.tia
leon

[MFolks]

The aerospace workers use a 1/4"-28 collet that accepts 1/4" regular burrs.

Hre are some website for suppliers:
1. www.aircraft-tool.com
2. www.browntool.com
3. www.cleavelandtoolstore.com
4. www.ustool.com

Look for drilling accessories at these websites.

[531blackbanshee]

thanks for the reply mfolks,i looked through those sites and was unable to locate any carbide burrs that were threaded.
does anyone know if i can heat the hardened shanks of carbide burrs that i have and take the temper out enough to thread them?
i tried on one last night and the tungsten made in japan die that i have just made it shiney.

[Just Bob Again]

You'll have a hard time finding them, if they exist. No, you can't anneal and thread carbide. Has to be ground with diamond or similar.

http://www.browntool.com/productsele...?ProductID=443

Here's an adapter for three bucks that lets you use a straight-shank burr in your machine.

[531blackbanshee]

the shanks that i am talking about are not carbide,they are hardened steel,(as far as i can find out).i have solid carbide and the ones with the carbide heads soldered on.it is the ones with the soldered on carbide heads that i am curious about annealing and threading.
mfolks just read where you said collet,i am going inside small 2-cycle cylinders and a collet gets in the way.
i just ordered the armature for my cc-specialty grinder that i have the ninety degree attachment and 1/8 shank carbides for,so i will be back up and running.
but i had the rockwell ninety degree that i was trying to "rig up"thanks for the replies.