Can a cylinder be split away from the rest of a body?

[jonYDM8U]

This model which I downloaded from McDiggity Dogg Carr (what's that name?) needs a slight adjustment to the inner diameter of the cylinder so it fits around a 1/2 PVC pipe with enough play to slip a thin rubber band to prevent slippage before tightening down.  But, I don't want to thin the wall of the clamp by offsetting the inside face without also expanding the outside face.  ( I realize that I could probably just scale the entire model to size which is probably what's going to happen anyway, but learning if this is possible will be helpful.)

I'm printing this with PLA, and it doesn't need to have a ton of structural integrity.  4 of these will be used to clamp PVC pipe in a dome shape over my baby's crib to hold a point and shoot time-lapse camera.

So, is it possible to split the model at the outside diameter of the clamp cylinder in order to scale just that part without affecting the rest of the model?  I suppose scaling the entire thing would mean adjusting for bolt hole diameters as well.

Thanks!

[jhackney1972]

You refer to a model, it is not attached so I do not think the forum users can answer your question.

[jonYDM8U]

Ooh...I see that offsetting the face still preserves the contours of the other parts of the model, so I might not need to do so many steps....but still would be nice to know how to do it.

[g-andresen]

Hi,

please follow the proposal of @jhackney1972  and:

Please share the file.

File > export > save as f3d locally  > attach it to the next post.

günther

[jonYDM8U]

Attached.

[g-andresen]

Hi,

try press/pull or offset face (Modify > Offset Face) of the desired area.

günther

[jhackney1972]

As @g-andresen mentioned Press Pull works on one end just fine but the other end has a fillet at the bottom of the bore that interferes.  I would use a simple extrusion to expand that bore.  I did not pay attention to the size the bores were expanded to in the Screencast. 

[jonYDM8U]

That is true.  I can adjust the face by 1/32" on one end on both the inside and outside diameter, but the other end gives me a chamfer interference error, so I'm not sure what to do other than creating a whole new body and then join it and hollow it out.

[jhackney1972]

Use the extrusion method to add/subtract material as shown in my Screencast.