Is it that when you order '.093' rings you get a different
product than when you order 3/32 rings?   What goes here?

BR, Dave McC

Yes you do.

Dave, As a backup to what Paul is saying I want to offer this to the group. Parker, The largest sales company for o-rings in the US lists the diameter of o-rings ordered by fractional sizes as follows:
1/16 "actual diameter" .070±.003 inches
3/32                   .103±.003 inches
1/8                    .139±.004 inches
3/16                   .210±.005 inches
1/4                    .275±.006 inches

Obviously these are all over the actual decimal figure for these sizes. These have been the "typical" o-ring sizes since I started in engineering almost 19 years ago. I don't know why the diameters are oversize, the biggest supplier gets to set the rules appearently.
Bill Jepson

 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.