[Dsg-rich] "Stiffening tool" assembling bolts

Brian Eng beng at jlab.org
Tue Jul 25 16:21:02 EDT 2017


Dario,

Can you add a column to your table of what thread pitch you are expecting to use for the bolts? If you don't have the exact number coarse or fine is good enough.

Bob Miller has confirmed that Grade 8 bolts are the US equivalent of ISO 10.9, but we must use the same pitch as your design called for.

Thanks

> On Jul 25, 2017, at 4:08 PM, <dario.orecchini at lnf.infn.it> <dario.orecchini at lnf.infn.it> wrote:
> 
> Hi Marc,
> Attached the excel file update with the correct length of the bolts.
> Some additional considerations ....
>  
> The added positions for the ISO standard bolts are now: Pos.16 / Pos.17 / Pos.18 / Pos.19,
> because we have to take in count also the washers.
>  
> This morning I could only check the depth of the M10 threated holes (25mm).
> On the M24 threated holes are mounted  the Swivel eyebolts and so it has not been possible to dismount them easily to check the depth of the holes.
>  
> I found the datasheet of the generic eyebolts M24 on the net in order to have the typical length of the threated stem. The information would be 38mm.
>  
> Anyway, if you have the datasheet, of the used eyebolts on the RICH, you could know their length and consequently we can know the depth of the holes.
> Remember, to fix the length of the Bolt M24 we have to consider also the thickness of the “Stiffening Tool Plate”, and those of the washer.
>  
> I hope I am been clear
> See you tomorrow morning
> Dario
>  
>  
> Sent from Mail for Windows 10
>  
> <Stiffening Tool_Assembly Bolts.xlsx>




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