[dsg-hallb_rich] [EXTERNAL] Re: Alternate possibility for RICH mirror springs

[Tyler Lemon]

Thanks, Brian. I did link the wrong one in my email.

-Tyler
________________________________
From: Brian Eng <beng at jlab.org>
Sent: Monday, September 27, 2021 10:17 AM
To: Marco Mirazita <Marco.Mirazita at lnf.infn.it>; Tyler Lemon <tlemon at jlab.org>
Cc: dsg-hallb_rich at jlab.org <dsg-hallb_rich at jlab.org>
Subject: Re: [dsg-hallb_rich] [EXTERNAL] Re: Alternate possibility for RICH mirror springs

I think maybe Tyler just linked to the wrong one for the second link?

Spring 1
OLD: https://dim.molle.com/dettagli.asp?id=1357
NEW: https://www.grainger.com/product/SPEC-Compression-Spring-Music-Wire-781KU9

Spring 2
OLD: https://dim.molle.com/dettagli.asp?id=1308
NEW: https://www.grainger.com/product/SPEC-Compression-Spring-Music-Wire-781KN0

Since everything seems to match up in the spec sheets Tyler's suggestion of just ordering them and then verifying once they arrive seems like the best course of action, especially considering the issues with the current PR.

________________________________
From: dsg-hallb_rich <dsg-hallb_rich-bounces at jlab.org> on behalf of Marco Mirazita <Marco.Mirazita at lnf.infn.it>
Sent: Monday, September 27, 2021 9:56 AM
To: Tyler Lemon <tlemon at jlab.org>
Cc: dsg-hallb_rich at jlab.org <dsg-hallb_rich at jlab.org>
Subject: [dsg-hallb_rich] [EXTERNAL] Re: Alternate possibility for RICH mirror springs

Hi Tyler,
maybe you can clarify the point by speaking with them?
There is also a problem with the dimensions of this one
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.grainger.com_product_SPEC-2DCompression-2DSpring-2DMusic-2DWire-2D781KD9&d=DwICAg&c=CJqEzB1piLOyyvZjb8YUQw&r=Ry65GV1L9CI4W-wouYF1Yh0O9PuhLc4ZWUkBi_Op2h8&m=s-ZV6-XoXWtIw0RlUIraomxwWiRnZNIQ-mCQ7iORX9o&s=KlvkgMkkkcNkru7XufKfFgB-ff5QTGxMz-RnwO4gLww&e=
that I guess should replace the D22550, the Grainger has wire diameter
half of the DIM.
Marco




Il 2021-09-27 15:28 Tyler Lemon ha scritto:
> Hello Marco Mirazita,
>
>  There has not been any progress on the procurement of the springs for
> the RICH spherical mirror support.
>
>  As a backup I started looking again at different websites for the
> springs and revisited the ones on Grainger.com that I initially sent
> you.
>
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.grainger.com_product_SPEC-2DCompression-2DSpring-2DMusic-2DWire-2D781KU9&d=DwICAg&c=CJqEzB1piLOyyvZjb8YUQw&r=Ry65GV1L9CI4W-wouYF1Yh0O9PuhLc4ZWUkBi_Op2h8&m=s-ZV6-XoXWtIw0RlUIraomxwWiRnZNIQ-mCQ7iORX9o&s=CC11-EAllr89v7foIk6AGiMrJmPDAsoB3o-V-_UzGqs&e=
>
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.grainger.com_product_SPEC-2DCompression-2DSpring-2DMusic-2DWire-2D781KD9&d=DwICAg&c=CJqEzB1piLOyyvZjb8YUQw&r=Ry65GV1L9CI4W-wouYF1Yh0O9PuhLc4ZWUkBi_Op2h8&m=s-ZV6-XoXWtIw0RlUIraomxwWiRnZNIQ-mCQ7iORX9o&s=KlvkgMkkkcNkru7XufKfFgB-ff5QTGxMz-RnwO4gLww&e=
>
>  I am somewhat confident that these springs are the same as the ones
> from dim.molle.com. In the attached screenshot from Grainger, the
> manufacturer model number is the same as dim.molle.com's and the ends
> of the springs are specified to be squared and ground. The photo shown
> on Grainger seems to be a generic spring picture since all springs in
> the "alternate products" section on the site have the same photo.
>
>  My suggestion is to submit another PR for the springs we need from
> Grainger. From my past orders from Grainger, they are pretty quick
> about delivering items and items usually arrive within one week. If
> the springs we get from Grainger are what is needed, then we are done
> and we cancel the original procurement. If the springs from Grainger
> do not have the flattened ends, then we can return them for a refund
> and wait on the original procurement.
>
>  -Tyler
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> dsg-hallb_rich at jlab.org
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