Increase diameter of two (aligned) holes.

[andytn.a4]

Hello.  I need to increase the diameter of these holes increased about 0.2mm.  As you can tell, they're aligned for the passage of a metal pin - just need them a smidge larger.  Appreciate any help with workflow on this one.  Thanks!

[hfcandrew]

Create a cylinder (pin) to the dimensions you want, and place it where it would go IRL, then do a boolean subtraction.

[andytn.a4]

Is there any way, other than eyeballing it, to ensure it's centered? Thanks

[hfcandrew · Accepted solution]

Yep. Can you Edit>Generate Facegroups then drop a pivot, then align the cylinder to the pivot:

Or.... A second different method I just thought about is just selecting your target surface and using soft transform with snap step to make it 0.2mm wider:

There is always several different ways to accomplish the same thing.

[andytn.a4]

So I chose the first option and was able to figure out using a cylinder and boolean difference.  But I'm not sure what's going on here.....here's the cylinder, then after selecting my solid and cylinder and 'boolean difference, and then after clicking accept - it seems to obliterate the holes.    Where did I go wrong?  Thanks again.

[hfcandrew]

Booleans can be finicky. Try remeshing. Or if its co-planar it can cause issues, jsut play around with the sliders until you get a result that works.

[Anonymous · Accepted solution]

This may happen if Auto-ReduceResult is enabled and one object (guess it's the cylinder) is low-poly.

Simply disable AutoReduceResult and the result should look like it is on the Orange/Blue preview.

[andytn.a4]

Yes, that did the trick exactly. Thank you!