How to drill gems?

[lucan07]

Have a friend into jewellry not sure where she buys her drills but what you are looking for are "bonded diamond drill bits" if I can get hold of her I will try and find out her european suppliers and PM you the details, but I know she also imports a lot from from the States because its cheaper.

[komatias]

google is your friend https://www.youtube.com/watch?v=itMhq8js8qc

[Boyan Silyavski]

Have a friend into jewellry not sure where she buys her drills but what you are looking for are "bonded diamond drill bits" if I can get hold of her I will try and find out her european suppliers and PM you the details, but I know she also imports a lot from from the States because its cheaper.

Great, it would be good to know what she is using exactly. So " bonded" is "METAL BOND (SINTERED) " right?

google is your friend https://www.youtube.com/watch?v=itMhq8js8qc

Thanks. I googled but as i said so many China crap which confuses me. And the above are 50$ per bit . So i would like to know what really works well . This one seems interesting as he says on ebay listing that this is the one that China factories use for bead drilling. They are cheap enough to try. Allright i will buy them. He sells 1.5mm and 2mm.

That still leaves to find the micro drills 0.8-1mm

I also saw some diamond micro twist drills?

[phill05]

Have a look here http://www.ukam.com/micro_core_drills.htm

Phill

[Boyan Silyavski]

i saw that at their page : Recommended Feed Rate: down or side feed: .010" per minute.

[Clive S]

And 35,000 to 150,000 RPM that's some spnidle

[lucan07]

Found a receipt with some drills I got from her last year and on that occasion she had purchased from covington-engineering.com in the states I know she travels to california regularly so a place to start they seem to stock most things related.