Questions re: hole & thread on body

[robzr]

I'm trying to add holes and threads on some model parts.  I'm having trouble with two things -

1- I cannot seem to locate holes other than via snapping to grid, or turning that off and locating them by freehand.  Oddly enough they won't to a point or a plane, and when I moved to part so I could snap it to the origin it won't - it tries to snap it +/- .5 mm off the origin.  Really frustrating since you can't move a hole.  And my part is a rotated sketch so I can't sketch the the holes in.  

2- What sizing should I be making my holes in order to default or easily select the threading?  Ex: I'm trying to thread 1/8 NPT 1/4 NPT and 1 1/8-18 UNEF; what diameter should my intial holes be?  I've tried major, minor and the named diameters but nothing seems to consistently work.

Rob

[mcnurlin]

1 - When you learn the trick about dimensioning holes it works pretty good. When you have your hole placed click the edges you want dimensions to and they'll show up. I saw it one of the videos in help.

2 - When you add threads to a hole it doesn't matter what size the hole is. The thread dialog box will resize the hole to what's required.

[SallyYang]

The above answers are correct, thank you very much!

Attach the screenshot of dimensioning a hole, you need to click the center point to make it active and then select reference lines.

[Anonymous]

Is this method of accurately placing a hole available with curved bodies? When I place holes in cylinders, I don't see hole position input boxes. It would be very helpful if I could locate holes, for example, at a specified distance from the end of a cylinder. Tnx.

[robzr]

OK - so I can get that method to work with a box; but when I create a cylinder by sketching a profile and then rotating, it never lets me select and end of the cylinder.  I would think this is a pretty common operation, as rotating a sketch is mimicking anything turned on a lathe.  Is there a way to precisely locate a hole on the side of a cylindrical shape?

Rob

[SallyYang]

I am sorry that we have a limitation in this case. The workaround is a little complex with much more steps:

1. Create a tangent plane to cylinder

2. Project the cylinder edges to the tangent plane

3. Add a sketch point

4. Add you dimension between sketch point and projected lines

5. Add Hole by selecting the sketch point

I have reported this issue to development team to get a resolution. Hope it could be fixed in future releases.  

Many thanks for your post!