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rjmax (Mechanical) (OP)
21 Feb 07 17:27
Is there an easy way to insert a bolt circle and maybe tie the dimension of the bolt circle to a bolt pattern?

Mechanical Engineer
Colmek Systems Engineering
Salt Lake City, UT
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Heckler (Mechanical)
21 Feb 07 17:47
Open a sketch > draw a circle then go to Tools > Sketch Tools > Circular Pattern

Sr. Mechanical Engineer
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fcsuper (Mechanical)
21 Feb 07 18:12
I would use the cicular array sketch function within the Hole Wizard feature, and not an array of sketch circles.  This way, the bolt pattern can be used to drive a part pattern at the assembly level.

CAD Engineer/ECN Analyst
Silicon Valley, CA

alolesen (Mechanical)
21 Feb 07 21:27
I like to use a circumscribed polygon, make it construction geometry and put a hole at each vertex.
CorBlimeyLimey (Mechanical)
21 Feb 07 21:37
alolesen ... what do you do when the hole qty changes?


Eltron (Mechanical)
22 Feb 07 9:31
Use the hole wizard to place the holes.  It's simple to modify the sketch, and you get the proper hole callout on your drawings.


alolesen (Mechanical)
22 Feb 07 23:27
Like Eltron says, use Hole Wizard. Then to change the number of holes, right click on the polygon and choose "edit polygon" from the menu.
rjmax (Mechanical) (OP)
26 Feb 07 8:39
So, when I go to detail the drawing how do I reference a Bolt Circle (B.C.) in the hole callout?

Mechanical Engineer
Colmek Systems Engineering
Salt Lake City, UT
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Eltron (Mechanical)
26 Feb 07 9:50
There are several ways to call out your bolt circle diameter.  
1. You can show the hole wizard sketch and dimension it.  I always add the text "BCD" to the dimension.
2. You can also just create a circle sketch in the drawing and dimension in the same way.
3. Otherwise you can click on the hole callout and add the text and symbols to the the Dimension Text window.

Hope that helps.  


CorBlimeyLimey (Mechanical)
26 Feb 07 9:58
SW doesn't have an "automatic" BCD in a Hole Callout.

When positioning the points on the HW sketch, use a construction circle, and add "BCD" to the diameter dimension. Then when using Insert > Model Items to place the dims, the BCD dimension will be seen. To complete the picture, RMB select the positioning sketch from the drawing view in the View Manager and select Show.


rjmax (Mechanical) (OP)
26 Feb 07 9:59
Eltron, that is what I have basically been doing.  I add it usually to the hole callout as text but I was wondering how to link the dimension of the B.C. so that if it changed it would automatically update.

Mechanical Engineer
Colmek Systems Engineering
Salt Lake City, UT
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     l__l      l__l

Eltron (Mechanical)
26 Feb 07 10:09
The only way it will update automatically is if you dimension the BCD sepatately from the hole callout.


alolesen (Mechanical)
26 Feb 07 10:44
I put a circular center mark on the hole pattern, this puts in a center line circle to represent the bolt circle. Then I dimension the resulting bolt circle. The only thing is that this dimension comes in as a radius, you have to go into its properties and change it to a diameter dimension.

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