Bolt with nut

[c-wych]

Hi.  So I'm trying to make a dynamic bolt that has a nut on it that can move back and forth but is constrained to the max distance set by the bolt length.  I want one line type between the head of the bolt and a different line type between the end of the bolt and the nut.

Currently if I take my nut past the end of the bolt, the lines are all messed up?

Thoughts?

I'm new to dynamic blocks but liking them.  I hope my wish isn't greater then something possible.

[RockyBrown4134]

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@dcasciato wrote:

This is the type of drawing block I am looking for. A couple of things - this is still Metric. The question and what I am looking for is a ANSI (Imperial) drawing. Also looking at the properties you specify the "Grip" distance. How do we streach this bolt, i.e. change the grip dimension?

Thanks - DJC

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Take a look at this site to start:

www.boltcouncil.org 2009RCSCSpecification.pdf - Table C-2.2

I'll look for others.

[RockyBrown4134]

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@dcasciato wrote:
I like your block - couple of things. When opening the Block - I am told there are "Authoring Elements" and optioned to open in "Block Edit Mode".

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Insert the the block into a drawing file (.dwg). I uploaded the block instead of putting it in a drawing first. My appologies.

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@dcasciato wrote:
I like your block - couple of things. When opening the Block - I am told there are "Authoring Elements" and optioned to open in "Block Edit Mode".

On screen I see the definitions of dimension. Thinking this can be modified for my desired bolt diameter and grip thickness... can't understand how to change these elements.

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This was a simple structural bolt 3/4" A325 I did as an example, with two dynamic grips. You can get more creative and put parameters and constraints to change the size. You may just want to create a block for each size diameter that you use, as a starting point. (Example: 1/4", 3/8", 1/2", 5/8", 3/4", and 1" diameters). Then work from there. 

Search Youtube for "Autocad Dynamic Blocks", or try the following:

Autodesk search results - dynamic block tutorials

Autodesk University Online

www.cad-notes.com - AutoCAD-Dynamic-block-tutorial-series

www.ellenfinkelstein.com - Dynamic-blocks-tutorial/

www.caddigest.com

[calteq]

DJC

Yes an ANSI bolt can be produced quite simply however please remember that
the bolt is only a representation and not accurate, but good enough for
medium to heavy engineering.

In the case of the Metric sizes the bolt and nut has been drawn at M2 size
and scaled for the other sizes.
This is OK for the bolt size but the bolt head, the nut and washers actual
dimension do not increase proportionally, they are slightly less, (this is
also the case for ANSI Sizes) so for the larger bolts the bolt head and nut
are slightly larger than in reality.

If you stick to the recommended minimum bolt centres then the use of this
block is OK and will save a lot of drafting time.

If a more accurate representation of the bolt is required, say for
precision engineering, then the only way will be to draw it individually or
draw all the sizes you require accurately in a dwg create dynamic blocks of
each one to just stretch to suit your drawing.

Hope this helps.

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Best Regards

Geoff