Announcements
Attention for Customers without Multi-Factor Authentication or Single Sign-On - OTP Verification rolls out April 2025. Read all about it here.

Need advice on how to dimension angled holes

Anonymous

Need advice on how to dimension angled holes

Anonymous
Not applicable

Hi all,

I am having a complete mental block regarding dimensioning of the angled holes shown below. 

 

how.png

 

The four holes are to be machined at a 12 degree angle. My first thought was placing a true-position callout at the hole centre-point on the surface (top view). This seems like it would be tricky for a machinist to gauge, however, made worse by the hole profile being elliptical on this view.

 

What would be the best way to dimension something like this for machining? Many thanks in advance!

1 Like
Reply
Accepted solutions (1)
3,377 Views
8 Replies
Replies (8)

TheCADWhisperer
Consultant
Consultant

How did you model the part?

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

When I have something I think might be tricky - I use the same modeling technique as my machining technique.

0 Likes

Anonymous
Not applicable

Hi TheCADWhisperer,

 

Please find F3D attached. The holes were made by creating angled cylinders from surface sketches and then using them as cutting tools against the main body. Maybe not the most efficient way, but the only way I can think of.

 

The holes will be used to guide partially threaded rods at precise angles.

0 Likes

rushabhthakkar_910
Advisor
Advisor

Found a similar Topic in the Solidworks Forum.. Maybe it can help you... 

Thanks and Regards,


Rushabh Thakkar.


Please use the Accept Solution button to mark any posts that provide the answer or solution. 


Likes are always welcome.


LinkedIn | Instagram | Facebook.      


                        


 


 

0 Likes

g-andresen
Consultant
Consultant

Hi,

try this

diameter dimension.png

günther

0 Likes

Anonymous
Not applicable

Hi Guenther,

 

Thank you for the reply! Out of curiosity, what DFM benefit would this provide over a true position callout on the surface and a reference angle? How would you infer the angle from this solution?

 

 

@rushabhthakkar_910  Thank you for the link! I can see he's got a kind of section view at an angle, but I can't work out how to translate that to my design?
 
 
 
 
 
 
0 Likes

rushabhthakkar_910
Advisor
Advisor

For the angle part, maybe you can use the method that is maybe used to show a tapper Hole...

 

The usual method of dimensioning a taper is to give the amount of taper in a note, such as TAPER 0.167 ON DIA. And then give the diameter at one end, plus the length, or give the diameter at both ends and omit the length.

 

And for the Link, Actually I too was not able to make it as to how that Section View at an Angle was made... That's the reason I shared the link... Or else, I would not have shared the Solidworks Forum Link here.. And maybe helped you out with how to get that in your design...

Thanks and Regards,


Rushabh Thakkar.


Please use the Accept Solution button to mark any posts that provide the answer or solution. 


Likes are always welcome.


LinkedIn | Instagram | Facebook.      


                        


 


 

0 Likes

g-andresen
Consultant
Consultant

Hi,


@Anonymous wrote:

 

 

 How would you infer the angle from this solution?

 

 

this way

angular.png

 

günther

0 Likes

Anonymous
Not applicable
Accepted solution

Hi all,

 

Reviving a slightly old thread, but I have the answer from the (now chosen) subcontractor for this part. A true position call out referencing the centreline of the surface ellipse is correct. Depending on the size of the hole, they will fabricate a simple shaft gauge, which would sit in the hole and then measure it's true position at a given height. The alternative would be two true position callouts for both ellipses each side, but this is more time consuming to QC and can get messy in terms of inferred angles.

 

I hope this helps anyone who has this question in the future!

0 Likes