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Kubotek Forum > KeyCreator & KeyCreator Viewer > Fasteners not to scale View modes: 
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Dana - 3/1/2021 7:48:10 AM
   
RE:Fasteners not to scale

Fasteners really should be created at the nominal size, it avoids a lot of confusion.  Two reasons for this, first, these types of fasteners, with the exception of dowel pins, rarely go into close toleranced holes, and second, until KC has a sophisticated automatic tolerance handling, users aren't using  the modeled bolt size to calculate a hole tolerance anyway.

Even for dowel pins, I'd rather model the pin and the hole nominal, and set the tolerance when dimensioning.  If you model an oversize dowel pin pressed into a nominal hole, the edge of the hole disappears in an isometric HLR or HLD drawing view, not what you want.


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jmccullough@kubotek3d.com - 3/4/2021 7:30:17 PM
   
RE:Fasteners not to scale
Thanks Dana. You've got a very good point about the pin larger than the interference fit hole that will obscure the top edge of the hole. No one wants that. 

Your post jogged my memory a little further. I'm pretty sure I've had this conversation before - it might have been years ago. I'll be sure to add these notes into the Jira issue so we don't lose them. I'm reaching the conclusion this new setting should be changed to use nominal diameter on fasteners by default. 

The part that has come back to me is that this issue comes down to operating in the traditional method in which labels, notes, or shop practice define clearance hole size.OR if the model-based definition method is in use and the hole geometry diameter has authority. Modeling fasteners at maximum diameter is only useful for the MBD minority who want to check the holes are OK by using a static interfernce test.  
John Wright McCullough
GM Marketing, Kubotek3D

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