04-20-2016, 08:55 AM
Mike, the 2mm inserts you have don't have the radial clearance needed for that small of a face groove. They are too tall.
I use Micro 100 (brand) solid carbide grooving tools. They are made for the task. Also, be careful with the depth. I don't know the material of the O-ring you have in mind but most are firm enough that only .005" to .007" squeeze is all you need. There are charts for the recommended squeeze on a given cross section size of the O-ring, I'll see if I can find one. The chart I use is a dog-eared card I have with the big box of O-rings I have at the shop... and I'm at home.
This site seems to be a cornucopia of O-ring information.
http://www.columbiaerd.com/seal_design.html
I use Micro 100 (brand) solid carbide grooving tools. They are made for the task. Also, be careful with the depth. I don't know the material of the O-ring you have in mind but most are firm enough that only .005" to .007" squeeze is all you need. There are charts for the recommended squeeze on a given cross section size of the O-ring, I'll see if I can find one. The chart I use is a dog-eared card I have with the big box of O-rings I have at the shop... and I'm at home.
This site seems to be a cornucopia of O-ring information.
http://www.columbiaerd.com/seal_design.html