Help cutting an O ring grove

[TomG]

Not exactly sure what you are cutting the O-Ring groove in, but if it's part of the barrel or chamber, you'll have to be careful not to compromise the strength. Al is also correct about the groove having to be square and allow enough room for the O-Ring to move. To seal, they need to move with the fluid they are being used to contain. You should also make sure to put a small radius in the corners to keep stress risers from forming, if it's in a stressed area. The Parker website used to have a lot of useful info on O-Rings.

Tom