I am having trouble understanding how to read the measurements from varies
brand router bits.

Below is for CMT

http://www.cmtusa.com/store/index1.ihtml?
x_page=store.ihtml&id=CID9581896837&step=2
&parentid=&menuinclude=leftnav_products.ihtml

Below is for Freud:

http://www.freudtools.com/woodworker...Bits/Rsd_Panel
/html/Rsd_Panel_1.html

And there's more, but for the sake to keep this short.

As much I understand raised panel routering, I look for the rail/stile
depth, that's it (for now). You know, it's either 3/8" or 7/16". But when I
look for that in their rail/stile set webpages, I can't locate those depth
measurements. I even sometime try arithmetic using other measurements
provided, IF ANY, then add or subtract, still doesn't give me the groove
depth. Example for CMT rail/stile (891.502.11), the "R" is 25/64", what is
that?

There's "overall diameter", "overall length", "large/small radius", and few
other terminology. Is there a link **with drawings** that can explain what
terminology means and how the measurements go about? Forgive me for not
google it before expressing in here...

Chuck