Bore holes on a tapered cylindrical part

[GoSS190]

I've been scratching my head with this all day and am in need of help. I need to figure out a way in Solidworks to bore large hole around already existing hole on a tapered cylindrical part in order to seat O-rings. I have made several attemps at this but cannot figure out a way to get the hole to conform to the rounded shape and the tapered angle to get the O-ring to seat at a level depth along the taper. Does anyone know how I could do this. I know that it would be incredible hard to machine (need a 4-axis machine) but how do I solve the issue in Solidworks to atleast get it drawn up?
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Edited by: GoSS190

 

[solidmonkey]

Try making an Offset Surface from the tapered face, then make your cut Up To that surface.

 

[jimshaw]

GoSS190,

There's also an option in the extrude menu that offers "offset surface" so it can be accomplished in a cingle feature (if that's your kind of thing).

Let us know how this works out for you,

Jim Shaw
http://www.linkedin.com/in/shawengineering