Asymmetric tapered hole

[earthcare]

Hi
I have a real challenge: I cam't even work out where to start.

I have a flat surface which is at 45 degrees to the Y and X axes. In that surface I need to form a tapered hole, but one that it not circular. A 2D drawing of the hole is attached.

I presume I can create the item, and position/align it to the existing drawing, then subtract one from the other, but:

• I have absolutely no idea how to draw this item!

• I have never positioned something that is at 45 degrees to one the standard axes.

I could probably work out the second (eventually) but the first baffles me completely.

Can anyone help?

[microelly2]

for your parts you have a placement property.
you can change the direction by the rotation attribute
if you switch to euler angle representation of the rotation it is easy to rotate along the main axes.

[meme2704]

Do you vant something like that?

[HarryGeier]

You can do that easilyy with a loft in Part Design WB

2018-05-16 15_09_26-FreeCAD.png (44.4 KiB) Viewed 826 times

If you want to sketch on slanted planes.. datum planes are the magic word
See in this video:

https://www.youtube.com/watch?v=dw9EDlYfE14&t=74s

[earthcare]

microelly2, thanks for the tip.

meme2704, that's almost it, thank you. The circle at the bottom of the hole is centred in the hole, rather than off-set, though, and the hole is perpendicular to a face that is at 45 degrees to the main axes of the drawing - sorry if I misled you in that regard.

HarryGeier, I'll have a look at datum planes, thanks.