O ring design

[Karl_T]

I am building a spider to go inside my lathe spindle bore. It needs to feed coolant to the part that is being deep hole drilled. Need to seal the coolant to not spray out the back of the part.

the only given here is the bore on the part - 10mm.

I want to fit a metal tube inside this bore with an O ring to seal it. Started reading machinery handbook and just got hopelessly confused. looks like I need to solve for D, G, and B/2 for an OD sealing O ring. AND then pick out which O ring to purchase.

See page 2602 from my handbook below.

 

[Firstram]

Rotate around an extension tube that seals to the bore of the part. More room to work and you don't run the risk of damaging the bore.

 

[Weldingrod1]

Parker O-ring handbook. Or Parker sealing handbook.
You start by seeing which cross section of O-ring fits your design. Then look up the gland dimensions. There is an extrusion gap between the parts that depends on pressure rating.

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[Karl_T]

I see Mcmaster only sells these two sizes that might fit. Think I should go with the #107??


Guess I am over thinking this, I'll just try a groove and see if it works, then go from there.