How to make two holes a set distance apart and centered off both sides of an oval?

[SuzukiGS750EZ]

Hey guys!

I'm trying to make a block off plate which is in the shape of an oval. The hole itself thread to thread is 4.7mm wide. The center to center point of both holes is 44.6mm. The width of the oval is 59.3mm and the height is 27mm. I can make and extrude the oval via the sketch command and then extruding it. What i'm having an issue with is placing both holes equal distance off both sides of the oval (long ways) and making sure the center to center is exact.

Also, the hole diameter is 4.7mm so i assume if i make it 4.8mm it'll give some wiggle room. How do I create a countersink without having the hardware. Is all hardware set to the same countersink angle? Also, how do I know how deep the countersink should be?

[MRWakefield · Accepted solution]

Is this what you're after?

Not all countersunk screws have the same angle. Start by finding out what the thread is this will help you determine which standard to use for the countersunk hole.

Scroll through the timeline to see how I constructed the model.

Hope this helps.

PS. Like your user name. I used to have a GS750 then a GS1000 😁

[SuzukiGS750EZ]

Thank you! I will definitely look over your timeline. Yes, they are bullet proof bikes! My grandfather had a GS1100. Great bikes!

[MRWakefield]

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@SuzukiGS750EZ wrote:

Thank you! I will definitely look over your timeline. Yes, they are bullet proof bikes! My grandfather had a GS1100. Great bikes!

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Yes, great bikes but I did have a big end bearing go on the 750 and managed to twist the crank on the thou... twice!!. after my GS1000 I got a Yamaha FZR1000 Genesis (that's pre-Exup) and boy did that thing get a thrashing, every day for years 😁. That was over 30 years ago I got that bike!

[SuzukiGS750EZ]

I need to get another 750. I'm 36 so the bike i had (an 82) was actually older than me by 6 years! Thank you for your solution, i just downloaded it now and am going to review it. I'm VERY new to fusion 360, seems like i'll never be able to remember all of this.

[MRWakefield]

I've never had a bike older than me (except for a 1961 Triumph Tiger T110 that was a box of bits!). That was only 1 year older though so I'm due for my 62nd birthday this year! How on earth did I make it this far?!

Don't worry, it'll all be second nature before you know it 😉

[SuzukiGS750EZ]

I still don't quite see how you did the holes. I guess my biggest issue was getting them spread apart 44.6mm (i assume having them grouped together as a set would then allow me to get them offset from the edges equal distance?). I then don't understand how you got them set an equal distance from each edge? Also, how do you remember all of this?!

[MRWakefield]

Ok, no problem. If you take a look at Sketch1 you'll see I've drawn an ellipse with the specified dimensions that's centred on the origin. In this sketch I've also included two points for the hole positions the required distance apart which are coincident with the horizontal centreline of the ellipse and symmetrical about the vertical centreline.

I then extruded the ellipse 3mm (I don't think you specified a distance so I chose an arbitrary value). I then selected the 'Hole' tool, made Sketch1 visible again so I could pick the two points and set the hole parameters accordingly.

Hope this helps clarify things.

[SuzukiGS750EZ]

Ok, one thing i learned/realized is to make the points in the sketch BEFORE extrusion, so thank you. Now, from the origin point, how did you move each one 22.3mm away?

[TheCADWhisperer]

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@SuzukiGS750EZ wrote:

Now, from the origin point, how did you move each one 22.3mm away?

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@SuzukiGS750EZ 

Symmetry Constraint about the vertical line.

(You can also achieve this with Mirror.)

@SuzukiGS750EZ 

You should always Attach your progress file here so that the experts can diagnose any issues you might be getting yourself into.  @MRWakefield  provided you with information, you should likewise respond the same way.

[MRWakefield]

Make sure when you place the two points that they're on the horizontal centreline of the ellipse. Then use the 'Symmetry' constraint to ensure they're symmetrical about the vertical centreline. Lastly place a dimension between the two points to set the distance between them.

EDIT:

Haha! I see @TheCADWhisperer beat me to it 😀

[SuzukiGS750EZ]

GOT IT! Thank you. I kept right clicking thinking the menu would pop up and it was up top the whole time. I also tried "move" and placed the point on the origin and set the X axis to 22.3 and -22.3 but the point never moved.

[SuzukiGS750EZ]

Thank you and I apologize. I never saved it because i didn't get to the point i had wanted so i kept coming back and re-trying.

[MRWakefield · Accepted solution]

Ok, as promised in my reply to your private message just now, here's the screen capture video of how I went about it. Hopefully this will make it all clear 😉 It might take a while for the forum to process the video and for it to become available to view.

[SuzukiGS750EZ]

Ah! That explains it all. I did not do two of the steps you did. THANK YOU VERY MUCH!

[MRWakefield]

No problem, I'm glad it helped. Happy Fusioning!

[samronbaker]

So I have a similar situation.  First off, I'm brand new to Fusion, but have been trained on Pro-E, so I understand some CAD.  I need to create two symmetrical holes in a rectangular shape.  I tried using your steps above, but when I create the center rectangle, the centerlines are both diagonal from corner to corner rather than horizontal and vertical like those shown in your oval above.  It doesn't create a centerline for me to use in order to create symmetrical holes in the top.  Here's my drawing.  I was able to create the threaded single hole to hold the hall effect sensor, but I need two holes in the top for screws...simple holes 5.5mm in diameter for #10 machine screws.  I'm sure I'm missing something simple because this seems like a process that is done 1000 times a day. 

[samronbaker]

[TheCADWhisperer]

@samronbaker 

It probably would have been best to start a new discussion thread with a link back to this thread as reference.

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